init

app/build.gradle

@@ -0,0 +1,111 @@
+plugins {
+    id 'com.android.application' version '9.2.1'
+    id 'org.jetbrains.kotlin.plugin.serialization' version '2.3.21'
+    id 'org.jetbrains.kotlin.plugin.compose' version '2.3.21'
+}
+
+android {
+    namespace = 'net.helcel.cowspent'
+    compileSdk = 37
+
+    defaultConfig {
+        buildConfigField("String", "APP_NAME", "\"Cowspent\"")
+        manifestPlaceholders["APP_NAME"] = "Cowspent"
+        applicationId "net.helcel.cowspent"
+        minSdk = 26
+        targetSdk = 37
+        versionName "1.0"
+        versionCode project.hasProperty('VERSION_CODE') ? project.property('VERSION_CODE').toInteger() : 1
+    }
+
+    signingConfigs {
+        register("release") {
+            try {
+                def keystorePropertiesFile = rootProject.file("app/keystore.properties")
+                def keystoreProperties = new Properties()
+                keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+
+                keyAlias keystoreProperties['keyAlias']
+                keyPassword keystoreProperties['keyPassword']
+                storeFile file(keystoreProperties['storeFile'])
+                storePassword keystoreProperties['storePassword']
+            } catch (FileNotFoundException e) {
+                println("File not found: ${e.message}")
+            }
+        }
+    }
+
+    buildTypes {
+        debug {
+            debuggable true
+            initWith(buildTypes.release)
+            signingConfig = signingConfigs.debug
+        }
+        release {
+            minifyEnabled true
+            shrinkResources = true
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+        signedRelease {
+            minifyEnabled true
+            shrinkResources = true
+            initWith(buildTypes.release)
+            matchingFallbacks = ['release']
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+            signingConfig = signingConfigs.getByName("release")
+        }
+    }
+
+    compileOptions {
+        coreLibraryDesugaringEnabled = true
+        sourceCompatibility JavaVersion.VERSION_21
+        targetCompatibility JavaVersion.VERSION_21
+        encoding = 'utf-8'
+    }
+
+    buildFeatures {
+        viewBinding = true
+        buildConfig = true
+        compose = true
+    }
+
+    kotlin {
+        jvmToolchain(21)
+    }
+
+    lint {
+        abortOnError = false
+        disable 'MissingTranslation'
+        disable 'UsingMaterialAndMaterial3Libraries'
+    }
+
+    androidResources {
+        generateLocaleConfig = true
+    }
+}
+
+dependencies {
+    implementation 'androidx.compose.foundation:foundation:1.11.2'
+    implementation 'androidx.compose.runtime:runtime:1.11.2'
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.1.5'
+
+    implementation 'androidx.preference:preference-ktx:1.2.1'
+    implementation 'androidx.work:work-runtime-ktx:2.11.2'
+
+    implementation 'com.google.zxing:core:3.5.4'
+    implementation 'androidx.camera:camera-camera2:1.6.1'
+    implementation 'androidx.camera:camera-lifecycle:1.6.1'
+    implementation 'androidx.camera:camera-view:1.6.1'
+    implementation 'com.github.nextcloud:Android-SingleSignOn:1.1.0'
+    implementation 'com.opencsv:opencsv:5.12.0'
+
+    implementation platform('androidx.compose:compose-bom:2026.05.01')
+    implementation 'androidx.compose.ui:ui'
+    implementation 'androidx.compose.material:material'
+    implementation 'androidx.compose.material:material-icons-extended'
+    implementation 'androidx.compose.ui:ui-tooling-preview'
+    debugImplementation 'androidx.compose.ui:ui-tooling'
+    implementation 'androidx.activity:activity-compose:1.13.0'
+    implementation 'androidx.activity:activity-ktx:1.13.0'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-compose:2.10.0'
+}

app/proguard-rules.pro

@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in C:\Users\stnieder\AppData\Local\Android\sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,126 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    android:installLocation="preferExternal">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false"/>
+    <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
+
+    <application
+        android:name="net.helcel.cowspent.util.Cowspent"
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:label="@string/app_name"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+
+        <activity android:name="net.helcel.cowspent.android.currencies.ManageCurrenciesActivity" />
+
+        <activity
+            android:name="net.helcel.cowspent.android.main.BillsListViewActivity"
+            android:theme="@style/AppTheme.NoActionBar"
+            android:exported="true">
+
+            <intent-filter>
+                <action android:name="android.intent.action.SEARCH" />
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.app.searchable"
+                android:resource="@xml/searchable" />
+            <meta-data
+                android:name="android.app.default_searchable"
+                android:value="net.helcel.cowspent.android.main.BillsListViewActivity" />
+        </activity>
+
+        <activity
+            android:name="net.helcel.cowspent.android.account.AccountActivity"
+            android:label="@string/settings_server_settings"
+            android:parentActivityName="net.helcel.cowspent.android.settings.PreferencesActivity"
+            android:windowSoftInputMode="stateVisible"
+            android:launchMode="standard"
+            />
+
+        <activity
+            android:name="net.helcel.cowspent.android.settings.PreferencesActivity"
+            android:label="@string/action_settings"
+            android:parentActivityName="net.helcel.cowspent.android.main.BillsListViewActivity"
+            android:windowSoftInputMode="stateHidden" />
+
+        <activity
+            android:name="net.helcel.cowspent.android.helper.QrCodeScannerActivity"
+            android:label="@string/action_scan_qrcode"
+            android:parentActivityName="net.helcel.cowspent.android.main.BillsListViewActivity"
+            android:windowSoftInputMode="stateHidden"
+            />
+
+        <activity
+            android:name="net.helcel.cowspent.android.project.create.NewProjectActivity"
+            android:label="@string/simple_add_project"
+            android:parentActivityName="net.helcel.cowspent.android.main.BillsListViewActivity"
+            android:windowSoftInputMode="stateHidden"
+            android:launchMode="standard"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data android:scheme="cospend" />
+                <data android:scheme="cowspent" />
+                <data android:host="*" />
+                <data android:pathPrefix="/" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data android:scheme="cospend+http" />
+                <data android:scheme="cowspent+http" />
+                <data android:host="*" />
+                <data android:pathPrefix="/" />
+            </intent-filter>
+        </activity>
+
+        <activity
+            android:name="net.helcel.cowspent.android.project.edit.EditProjectActivity"
+            android:label="@string/simple_edit_project"
+            android:parentActivityName="net.helcel.cowspent.android.main.BillsListViewActivity"
+            android:windowSoftInputMode="stateHidden"
+            android:launchMode="standard">
+        </activity>
+
+        <activity
+            android:name="net.helcel.cowspent.android.bill_edit.EditBillActivity"
+            android:label="@string/simple_edit_bill"
+            android:parentActivityName="net.helcel.cowspent.android.main.BillsListViewActivity"
+            android:windowSoftInputMode="stateHidden"
+            android:launchMode="standard">
+        </activity>
+
+        <activity
+            android:name="net.helcel.cowspent.android.about.AboutActivity"
+            android:label="@string/simple_about"
+            android:parentActivityName="net.helcel.cowspent.android.main.BillsListViewActivity" />
+
+        <activity
+            android:name="net.helcel.cowspent.android.statistics.ProjectStatisticsActivity"
+            android:label="@string/statistic_title"
+            android:parentActivityName="net.helcel.cowspent.android.main.BillsListViewActivity"
+            android:theme="@style/AppTheme.NoActionBar" />
+
+        <activity
+            android:name="net.helcel.cowspent.android.bill_label.LabelBillsActivity"
+            android:label="@string/label_bills_title"
+            android:parentActivityName="net.helcel.cowspent.android.main.BillsListViewActivity"
+            android:theme="@style/AppTheme.NoActionBar" />
+
+    </application>
+</manifest>

app/src/main/java/net/helcel/cowspent/android/about/AboutActivity.kt

@@ -0,0 +1,21 @@
+package net.helcel.cowspent.android.about
+
+import android.os.Bundle
+import androidx.activity.compose.setContent
+import androidx.appcompat.app.AppCompatActivity
+import net.helcel.cowspent.theme.ThemeUtils
+
+class AboutActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setContent {
+            ThemeUtils.CowspentTheme {
+                AboutScreen(
+                    onBack = { finish() }
+                )
+            }
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/about/AboutScreen.kt

@@ -0,0 +1,153 @@
+package net.helcel.cowspent.android.about
+
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.Icon
+import androidx.compose.material.IconButton
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Scaffold
+import androidx.compose.material.Text
+import androidx.compose.material.TopAppBar
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.LocalUriHandler
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextDecoration
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import net.helcel.cowspent.BuildConfig
+import net.helcel.cowspent.R
+import net.helcel.cowspent.theme.ThemeUtils
+
+@Composable
+fun AboutScreen(
+    onBack: () -> Unit
+) {
+    val uriHandler = LocalUriHandler.current
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.simple_about)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.primary,
+                elevation = 0.dp
+            )
+        }
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .padding(padding)
+                .fillMaxSize()
+                .verticalScroll(rememberScrollState())
+                .padding(24.dp),
+            horizontalAlignment = Alignment.CenterHorizontally
+        ) {
+            Image(
+                painter = painterResource(id = R.drawable.ic_launcher_foreground),
+                contentDescription = null,
+                modifier = Modifier
+                    .size(156.dp)
+                    .clip(CircleShape)
+            )
+
+            Spacer(modifier = Modifier.height(16.dp))
+
+            Text(
+                text = stringResource(id = R.string.app_name),
+                style = MaterialTheme.typography.h4,
+                fontWeight = FontWeight.Bold
+            )
+
+            Text(
+                text = stringResource(R.string.about_version, BuildConfig.VERSION_NAME),
+                style = MaterialTheme.typography.body2,
+                fontWeight = FontWeight.Bold
+            )
+
+            Spacer(modifier = Modifier.height(48.dp))
+
+            AboutItem(
+                title = stringResource(R.string.about_maintainer_title),
+                content = stringResource(R.string.about_maintainer)
+            )
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            AboutItem(
+                title = stringResource(R.string.about_license_title),
+                content = stringResource(R.string.about_license)
+            )
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            val sourceUrl = stringResource(R.string.about_source)
+            AboutItem(
+                title = stringResource(R.string.about_source_title),
+                content = sourceUrl,
+                onClick = { uriHandler.openUri(sourceUrl) }
+            )
+        }
+    }
+}
+
+@Composable
+fun AboutItem(
+    title: String,
+    content: String,
+    modifier: Modifier = Modifier,
+    onClick: (() -> Unit)? = null
+) {
+    var itemModifier = modifier.fillMaxWidth()
+    if (onClick != null) {
+        itemModifier = itemModifier.clickable(onClick = onClick)
+    }
+
+    Column(
+        modifier = itemModifier,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text(
+            text = title.uppercase(),
+            style = MaterialTheme.typography.caption,
+            color = MaterialTheme.colors.primary,
+            fontWeight = FontWeight.Bold
+        )
+        Text(
+            text = content,
+            style = MaterialTheme.typography.body1,
+            textAlign = TextAlign.Center,
+            color = if (onClick != null) MaterialTheme.colors.primary else MaterialTheme.typography.body1.color,
+            textDecoration = if (onClick != null) TextDecoration.Underline else null
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun AboutScreenPreview() {
+    ThemeUtils.CowspentTheme {
+        AboutScreen(onBack = {})
+    }
+}

app/src/main/java/net/helcel/cowspent/android/account/AccountActivity.kt

@@ -0,0 +1,339 @@
+package net.helcel.cowspent.android.account
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.content.Intent
+import android.content.SharedPreferences
+import android.os.Build
+import android.os.Bundle
+import android.util.Log
+import android.webkit.CookieManager
+import android.webkit.WebResourceRequest
+import android.webkit.WebView
+import android.webkit.WebViewClient
+import android.widget.Toast
+import androidx.activity.OnBackPressedCallback
+import androidx.activity.compose.setContent
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material.CircularProgressIndicator
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.viewinterop.AndroidView
+import androidx.core.content.edit
+import androidx.lifecycle.lifecycleScope
+import androidx.preference.PreferenceManager
+import com.nextcloud.android.sso.AccountImporter
+import com.nextcloud.android.sso.helper.SingleAccountHelper
+import com.nextcloud.android.sso.model.SingleSignOnAccount
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.main.MainConstants
+import net.helcel.cowspent.theme.ThemeUtils
+import net.helcel.cowspent.util.CospendClientUtil
+import net.helcel.cowspent.util.CospendClientUtil.LoginStatus
+import java.net.URLDecoder
+import java.util.Locale
+
+
+class AccountActivity : AppCompatActivity() {
+
+    private val viewModel: AccountViewModel by viewModels()
+
+    companion object {
+        private val TAG = AccountActivity::class.java.simpleName
+
+        const val SETTINGS_USE_SSO = "settingsUseSSO"
+        const val SETTINGS_SSO_URL = "settingsSSOUrl"
+        const val SETTINGS_SSO_USERNAME = "settingsSSOUsername"
+        const val SETTINGS_URL = "settingsUrl"
+        const val SETTINGS_USERNAME = "settingsUsername"
+        const val SETTINGS_PASSWORD = "settingsPassword"
+        const val SETTINGS_KEY_ETAG = "sessions_last_etag"
+        const val SETTINGS_KEY_LAST_MODIFIED = "sessions_last_modified"
+        const val DEFAULT_SETTINGS = ""
+        const val CREDENTIALS_CHANGED = 3
+
+        const val LOGIN_URL_DATA_KEY_VALUE_SEPARATOR = ":"
+        const val WEBDAV_PATH_4_0_AND_LATER = "/remote.php/webdav"
+    }
+
+    private lateinit var preferences: SharedPreferences
+    private var oldPassword = ""
+    private var useWebLogin = true
+    private var showLoginDialog by mutableStateOf(false)
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        preferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+
+        onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                if (viewModel.showWebView) {
+                    viewModel.showWebView = false
+                } else {
+                    finish()
+                }
+            }
+        })
+
+        setContent {
+            ThemeUtils.CowspentTheme {
+                if (viewModel.showWebView) {
+                    val serverUrl = CospendClientUtil.formatURL(viewModel.serverUrl)
+                    WebLoginScreen(
+                        url = normalizeUrlSuffix(serverUrl) + "index.php/login/flow",
+                        onLoginUrlDetected = { parseAndLoginFromWebView(it) }
+                    )
+                } else {
+                    AccountScreen(
+                        viewModel = viewModel,
+                        onBack = { finish() },
+                        onConnect = { login() },
+                        onSsoClick = { isChecked ->
+                            if (isChecked) {
+                                showLoginDialog = true
+                            } else {
+                                viewModel.useSso = false
+                                preferences.edit { putBoolean(SETTINGS_USE_SSO, false) }
+                            }
+                        },
+                        onLogout = { viewModel.logout() }
+                    )
+                }
+
+                LoginDialog(
+                    showDialog = showLoginDialog,
+                    onDismissRequest = { showLoginDialog = false },
+                    onInitiateSsoLogin = {
+                        showLoginDialog = false
+                        try {
+                            AccountImporter.pickNewAccount(this@AccountActivity)
+                        } catch (e: Exception) {
+                            Log.e(TAG, "Failed to initiate SSO login", e)
+                            Toast.makeText(this@AccountActivity, "SSO login failed: ${e.message}", Toast.LENGTH_SHORT).show()
+                        }
+                    }
+                )
+            }
+        }
+        
+        oldPassword = preferences.getString(SETTINGS_PASSWORD, DEFAULT_SETTINGS) ?: ""
+        viewModel.validateUrl()
+    }
+
+    @SuppressLint("SetJavaScriptEnabled")
+    @Composable
+    private fun WebLoginScreen(url: String, onLoginUrlDetected: (String) -> Unit) {
+        var isLoading by remember { mutableStateOf(true) }
+        
+        Box(modifier = Modifier.fillMaxSize()) {
+            AndroidView(
+                factory = { context ->
+                    WebView(context).apply {
+                        CookieManager.getInstance().setAcceptCookie(true)
+                        CookieManager.getInstance().setAcceptThirdPartyCookies(this, true)
+
+                        settings.apply {
+                            allowFileAccess = false
+                            javaScriptEnabled = true
+                            domStorageEnabled = true
+                            userAgentString = getWebLoginUserAgent(context)
+                        }
+                        webViewClient = object : WebViewClient() {
+                            @Deprecated("Deprecated in Java")
+                            override fun shouldOverrideUrlLoading(view: WebView?, url: String?): Boolean {
+                                if (url?.startsWith("nc://login/") == true) {
+                                    onLoginUrlDetected(url)
+                                    return true
+                                }
+                                return false
+                            }
+
+                            override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?): Boolean {
+                                val url = request?.url?.toString()
+                                if (url?.startsWith("nc://login/") == true) {
+                                    onLoginUrlDetected(url)
+                                    return true
+                                }
+                                return false
+                            }
+
+                            override fun onPageFinished(view: WebView?, url: String?) {
+                                super.onPageFinished(view, url)
+                                isLoading = false
+                            }
+                        }
+                        
+                        val headers = HashMap<String, String>()
+                        headers["OCS-APIREQUEST"] = "true"
+                        loadUrl(url, headers)
+                    }
+                },
+                modifier = Modifier.fillMaxSize()
+            )
+            
+            if (isLoading) {
+                CircularProgressIndicator(modifier = Modifier.align(Alignment.Center))
+            }
+        }
+    }
+
+    @Deprecated("Deprecated in Java")
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        try {
+            AccountImporter.onActivityResult(requestCode, resultCode, data, this
+            ) { ssoAccount ->
+                lifecycleScope.launch {
+                    SingleAccountHelper.commitCurrentAccount(applicationContext, ssoAccount.name)
+
+                    preferences.edit {
+                        putBoolean(SETTINGS_USE_SSO, true)
+                        putString(SETTINGS_SSO_URL, ssoAccount.url)
+                        putString(SETTINGS_SSO_USERNAME, ssoAccount.userId)
+                    }
+
+                    viewModel.useSso = true
+                    viewModel.serverUrl = ssoAccount.url
+                    viewModel.username = ssoAccount.userId
+
+                    val resultData = Intent()
+                    resultData.putExtra(MainConstants.CREDENTIALS_CHANGED, CREDENTIALS_CHANGED)
+                    setResult(RESULT_OK, resultData)
+                    finish()
+                }
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "SSO account selection failed", e)
+        }
+    }
+
+    private fun legacyLogin() {
+        val url = CospendClientUtil.formatURL(viewModel.serverUrl.trim())
+        val username = viewModel.username
+        var password = viewModel.password
+
+        if (password.isEmpty()) {
+            password = oldPassword
+        }
+
+        performLogin(url, username, password)
+    }
+
+    private fun login() {
+        if (useWebLogin) {
+            viewModel.showWebView = true
+        } else {
+            legacyLogin()
+        }
+    }
+
+    private fun getWebLoginUserAgent(context: Context): String {
+        val defaultUA = try {
+            android.webkit.WebSettings.getDefaultUserAgent(context)
+        } catch (_: Exception) {
+            Build.MANUFACTURER + " " + Build.MODEL
+        }
+        return "$defaultUA Cowspent/Android"
+    }
+
+    private fun parseAndLoginFromWebView(dataString: String) {
+        try {
+            val loginUrlInfo = parseLoginDataUrl(dataString)
+            val url = normalizeUrlSuffix(loginUrlInfo.serverAddress)
+            performLogin(url, loginUrlInfo.username, loginUrlInfo.password)
+        } catch (e: IllegalArgumentException) {
+            Log.e(TAG, "Invalid login URL", e)
+        }
+    }
+
+    private fun parseLoginDataUrl(dataString: String): LoginUrlInfo {
+        val prefix = "nc://login/"
+        if (dataString.length < prefix.length) {
+            throw IllegalArgumentException("Invalid login URL detected")
+        }
+        val loginUrlInfo = LoginUrlInfo()
+        val data = dataString.substring(prefix.length)
+        val values = data.split("&")
+
+        if (values.size !in 1..3) {
+            throw IllegalArgumentException("Illegal number of login URL elements detected: ${values.size}")
+        }
+
+        for (value in values) {
+            when {
+                value.startsWith("user$LOGIN_URL_DATA_KEY_VALUE_SEPARATOR") -> {
+                    loginUrlInfo.username = URLDecoder.decode(value.substring(("user$LOGIN_URL_DATA_KEY_VALUE_SEPARATOR").length), "UTF-8")
+                }
+                value.startsWith("password$LOGIN_URL_DATA_KEY_VALUE_SEPARATOR") -> {
+                    loginUrlInfo.password = URLDecoder.decode(value.substring(("password$LOGIN_URL_DATA_KEY_VALUE_SEPARATOR").length), "UTF-8")
+                }
+                value.startsWith("server$LOGIN_URL_DATA_KEY_VALUE_SEPARATOR") -> {
+                    loginUrlInfo.serverAddress = URLDecoder.decode(value.substring(("server$LOGIN_URL_DATA_KEY_VALUE_SEPARATOR").length), "UTF-8")
+                }
+                else -> throw IllegalArgumentException("Illegal magic login URL element detected: $value")
+            }
+        }
+        return loginUrlInfo
+    }
+
+    private fun normalizeUrlSuffix(url: String): String {
+        return when {
+            url.lowercase(Locale.ROOT).endsWith(WEBDAV_PATH_4_0_AND_LATER) -> {
+                url.substring(0, url.length - WEBDAV_PATH_4_0_AND_LATER.length)
+            }
+            !url.endsWith("/") -> "$url/"
+            else -> url
+        }
+    }
+
+
+    private fun performLogin(url: String, username: String, password: String) {
+        viewModel.isSubmitting = true
+        viewModel.showWebView = false
+
+        lifecycleScope.launch {
+            val status = withContext(Dispatchers.IO) {
+                CospendClientUtil.isValidLogin(url, username, password)
+            }
+
+            if (status == LoginStatus.OK) {
+                preferences.edit {
+                    putString(SETTINGS_URL, url)
+                    putString(SETTINGS_USERNAME, username)
+                    putString(SETTINGS_PASSWORD, password)
+                    remove(SETTINGS_KEY_ETAG)
+                    remove(SETTINGS_KEY_LAST_MODIFIED)
+                }
+
+                val data = Intent()
+                data.putExtra(MainConstants.CREDENTIALS_CHANGED, CREDENTIALS_CHANGED)
+                setResult(RESULT_OK, data)
+                finish()
+            } else {
+                Log.e("Cowspent", "invalid login")
+                viewModel.isSubmitting = false
+                Toast.makeText(applicationContext, getString(R.string.error_invalid_login, getString(status.str)), Toast.LENGTH_LONG).show()
+            }
+        }
+    }
+
+
+    class LoginUrlInfo {
+        var serverAddress: String = ""
+        var username: String = ""
+        var password: String = ""
+    }
+
+}

app/src/main/java/net/helcel/cowspent/android/account/AccountScreen.kt

@@ -0,0 +1,266 @@
+@file:Suppress("SameParameterValue", "SameParameterValue", "SameParameterValue",
+    "SameParameterValue", "SameParameterValue", "SameParameterValue"
+)
+
+package net.helcel.cowspent.android.account
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.Button
+import androidx.compose.material.CircularProgressIndicator
+import androidx.compose.material.Icon
+import androidx.compose.material.IconButton
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.OutlinedTextField
+import androidx.compose.material.Scaffold
+import androidx.compose.material.Switch
+import androidx.compose.material.SwitchDefaults
+import androidx.compose.material.Text
+import androidx.compose.material.TopAppBar
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Check
+import androidx.compose.material.icons.filled.Link
+import androidx.compose.material.icons.filled.Lock
+import androidx.compose.material.icons.filled.Person
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.theme.ThemeUtils
+
+@Composable
+fun AccountScreen(
+    viewModel: AccountViewModel,
+    onBack: () -> Unit,
+    onConnect: () -> Unit,
+    onSsoClick: (Boolean) -> Unit,
+    onLogout: () -> Unit
+) {
+    AccountScreenContent(
+        isLoggedIn = viewModel.isLoggedIn,
+        isValidatingLogin = viewModel.isValidatingLogin,
+        useSso = viewModel.useSso,
+        serverUrl = viewModel.serverUrl,
+        username = viewModel.username,
+        password = viewModel.password,
+        isUrlValid = viewModel.isUrlValid,
+        showUrlWarning = viewModel.showUrlWarning,
+        isSubmitting = viewModel.isSubmitting,
+        isFormValid = viewModel.isFormValid,
+        onServerUrlChange = {
+            viewModel.serverUrl = it
+            viewModel.validateUrl()
+        },
+        onUsernameChange = { viewModel.username = it },
+        onPasswordChange = { viewModel.password = it },
+        onBack = onBack,
+        onConnect = onConnect,
+        onSsoClick = onSsoClick,
+        onLogout = onLogout
+    )
+}
+
+@Composable
+fun AccountScreenContent(
+    isLoggedIn: Boolean,
+    isValidatingLogin: Boolean,
+    useSso: Boolean,
+    serverUrl: String,
+    username: String,
+    password: String,
+    isUrlValid: Boolean,
+    showUrlWarning: Boolean,
+    isSubmitting: Boolean,
+    isFormValid: Boolean,
+    onServerUrlChange: (String) -> Unit,
+    onUsernameChange: (String) -> Unit,
+    onPasswordChange: (String) -> Unit,
+    onBack: () -> Unit,
+    onConnect: () -> Unit,
+    onSsoClick: (Boolean) -> Unit,
+    onLogout: () -> Unit
+) {
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.settings_server_settings)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.primary,
+                elevation = 0.dp
+            )
+        }
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .padding(padding)
+                .padding(16.dp)
+                .verticalScroll(rememberScrollState())
+                .fillMaxSize()
+        ) {
+            if (isValidatingLogin) {
+                Box(modifier = Modifier.fillMaxWidth().padding(vertical = 32.dp), contentAlignment = Alignment.Center) {
+                    CircularProgressIndicator()
+                }
+            } else if (isLoggedIn) {
+                Text(
+                    text = stringResource(R.string.account_logged_in_as, username),
+                    style = MaterialTheme.typography.h6
+                )
+                Text(
+                    text = serverUrl,
+                    style = MaterialTheme.typography.body2,
+                    color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f)
+                )
+                Spacer(modifier = Modifier.height(16.dp))
+                Button(
+                    onClick = onLogout,
+                    modifier = Modifier.fillMaxWidth()
+                ) {
+                    Text(stringResource(R.string.account_logout))
+                }
+                Spacer(modifier = Modifier.height(24.dp))
+            }
+
+            if (!isValidatingLogin) {
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    modifier = Modifier.padding(vertical = 8.dp)
+                ) {
+                    Text(stringResource(R.string.use_sso_toggle), modifier = Modifier.weight(1f))
+                    Switch(
+                        checked = useSso,
+                        onCheckedChange = { onSsoClick(it) },
+                        colors = SwitchDefaults.colors(
+                            uncheckedThumbColor = MaterialTheme.colors.onSurface.copy(alpha = 0.6f),
+                            uncheckedTrackColor = MaterialTheme.colors.onSurface.copy(alpha = 0.3f)
+                        )
+                    )
+                }
+
+                if (!useSso) {
+                    Spacer(modifier = Modifier.height(16.dp))
+
+                    OutlinedTextField(
+                        value = serverUrl,
+                        onValueChange = onServerUrlChange,
+                        label = { Text(stringResource(R.string.settings_url)) },
+                        modifier = Modifier.fillMaxWidth(),
+                        leadingIcon = { Icon(Icons.Default.Link, contentDescription = null) },
+                        trailingIcon = {
+                            if (isUrlValid) {
+                                Icon(
+                                    Icons.Default.Check,
+                                    contentDescription = null,
+                                    tint = Color.Green
+                                )
+                            }
+                        },
+                        singleLine = true
+                    )
+
+                    if (showUrlWarning) {
+                        Text(
+                            stringResource(R.string.settings_url_warn_http),
+                            color = MaterialTheme.colors.error,
+                            style = MaterialTheme.typography.caption,
+                            modifier = Modifier.padding(start = 16.dp, top = 4.dp)
+                        )
+                    }
+
+                    Spacer(modifier = Modifier.height(8.dp))
+
+                    OutlinedTextField(
+                        value = username,
+                        onValueChange = onUsernameChange,
+                        label = { Text(stringResource(R.string.settings_username)) },
+                        modifier = Modifier.fillMaxWidth(),
+                        leadingIcon = { Icon(Icons.Default.Person, contentDescription = null) },
+                        singleLine = true
+                    )
+
+                    Spacer(modifier = Modifier.height(8.dp))
+
+                    @Suppress("DEPRECATION")
+                    OutlinedTextField(
+                        value = password,
+                        onValueChange = onPasswordChange,
+                        label = { Text(stringResource(R.string.settings_password)) },
+                        modifier = Modifier.fillMaxWidth(),
+                        leadingIcon = { Icon(Icons.Default.Lock, contentDescription = null) },
+                        visualTransformation = PasswordVisualTransformation(),
+                        singleLine = true
+                    )
+
+                    Spacer(modifier = Modifier.height(24.dp))
+
+                    Button(
+                        onClick = onConnect,
+                        modifier = Modifier.fillMaxWidth(),
+                        enabled = isFormValid && !isSubmitting
+                    ) {
+                        if (isSubmitting) {
+                            CustomCircularProgressIndicator(size = 24.dp, color = Color.White)
+                        } else {
+                            Text(stringResource(R.string.settings_submit))
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun CustomCircularProgressIndicator(size: Dp, color: Color) {
+    CircularProgressIndicator(
+        modifier = Modifier.size(size),
+        color = color,
+        strokeWidth = 2.dp
+    )
+}
+
+@Preview(showBackground = true)
+@Composable
+fun AccountScreenPreview() {
+    ThemeUtils.CowspentTheme {
+        AccountScreenContent(
+            isLoggedIn = false,
+            isValidatingLogin = false,
+            useSso = false,
+            serverUrl = "https://nextcloud.example.com",
+            username = "user",
+            password = "",
+            isUrlValid = true,
+            showUrlWarning = false,
+            isSubmitting = false,
+            isFormValid = true,
+            onServerUrlChange = {},
+            onUsernameChange = {},
+            onPasswordChange = {},
+            onBack = {},
+            onConnect = {},
+            onSsoClick = {},
+            onLogout = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/account/AccountViewModel.kt

@@ -0,0 +1,122 @@
+package net.helcel.cowspent.android.account
+
+import android.app.Application
+import android.content.SharedPreferences
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.core.content.edit
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.preference.PreferenceManager
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.util.CospendClientUtil
+
+class AccountViewModel(application: Application) : AndroidViewModel(application) {
+    private val preferences: SharedPreferences = PreferenceManager.getDefaultSharedPreferences(application)
+
+    var useSso by mutableStateOf(preferences.getBoolean(AccountActivity.SETTINGS_USE_SSO, false))
+    var serverUrl by mutableStateOf(
+        if (preferences.getBoolean(AccountActivity.SETTINGS_USE_SSO, false)) {
+            preferences.getString(AccountActivity.SETTINGS_SSO_URL, "") ?: ""
+        } else {
+            preferences.getString(AccountActivity.SETTINGS_URL, "") ?: ""
+        }
+    )
+    var username by mutableStateOf(
+        if (preferences.getBoolean(AccountActivity.SETTINGS_USE_SSO, false)) {
+            preferences.getString(AccountActivity.SETTINGS_SSO_USERNAME, "") ?: ""
+        } else {
+            preferences.getString(AccountActivity.SETTINGS_USERNAME, "") ?: ""
+        }
+    )
+    var password by mutableStateOf("")
+
+    var isUrlValid by mutableStateOf(false)
+    var isSubmitting by mutableStateOf(false)
+    var showUrlWarning by mutableStateOf(false)
+    var showWebView by mutableStateOf(false)
+
+    var isLoggedIn by mutableStateOf(false)
+        private set
+
+    var isValidatingLogin by mutableStateOf(false)
+        private set
+
+    init {
+        checkLoginStatus()
+    }
+
+    private fun checkLoginStatus() {
+        val url = if (useSso) {
+            preferences.getString(AccountActivity.SETTINGS_SSO_URL, "")
+        } else {
+            preferences.getString(AccountActivity.SETTINGS_URL, "")
+        }
+        val username = if (useSso) {
+            preferences.getString(AccountActivity.SETTINGS_SSO_USERNAME, "")
+        } else {
+            preferences.getString(AccountActivity.SETTINGS_USERNAME, "")
+        }
+        val password = if (useSso) {
+            ""
+        } else {
+            preferences.getString(AccountActivity.SETTINGS_PASSWORD, "")
+        }
+
+        if (!url.isNullOrEmpty() && !username.isNullOrEmpty()) {
+            viewModelScope.launch {
+                isValidatingLogin = true
+                isLoggedIn = withContext(Dispatchers.IO) {
+                    if (useSso) {
+                        true
+                    } else {
+                        !password.isNullOrEmpty() &&
+                                CospendClientUtil.isValidLogin(
+                                    url,
+                                    username,
+                                    password
+                                ) == CospendClientUtil.LoginStatus.OK
+                    }
+                }
+                isValidatingLogin = false
+            }
+        }
+    }
+
+    fun logout() {
+        preferences.edit {
+            remove(AccountActivity.SETTINGS_USE_SSO)
+            remove(AccountActivity.SETTINGS_SSO_URL)
+            remove(AccountActivity.SETTINGS_SSO_USERNAME)
+            remove(AccountActivity.SETTINGS_URL)
+            remove(AccountActivity.SETTINGS_USERNAME)
+            remove(AccountActivity.SETTINGS_PASSWORD)
+            remove(AccountActivity.SETTINGS_KEY_ETAG)
+            remove(AccountActivity.SETTINGS_KEY_LAST_MODIFIED)
+        }
+
+        useSso = false
+        serverUrl = ""
+        username = ""
+        password = ""
+        isLoggedIn = false
+    }
+
+    fun validateUrl() {
+        val formattedUrl = CospendClientUtil.formatURL(serverUrl)
+        showUrlWarning = CospendClientUtil.isHttp(formattedUrl) && !useSso
+
+        viewModelScope.launch {
+            val valid = withContext(Dispatchers.IO) {
+                CospendClientUtil.isValidURL(formattedUrl)
+            }
+            isUrlValid = valid
+        }
+    }
+
+    val isFormValid: Boolean
+        get() = useSso || (isUrlValid && username.isNotEmpty())
+}

app/src/main/java/net/helcel/cowspent/android/account/LoginDialog.kt

@@ -0,0 +1,117 @@
+package net.helcel.cowspent.android.account
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.AlertDialog
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Surface
+import androidx.compose.material.Text
+import androidx.compose.material.TextButton
+import androidx.compose.material.contentColorFor
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun LoginDialog(
+    showDialog: Boolean,
+    onDismissRequest: () -> Unit,
+    onInitiateSsoLogin: () -> Unit,
+    errorMessage: String? = null
+) {
+    if (showDialog) {
+        AlertDialog(
+            onDismissRequest = onDismissRequest,
+            shape = MaterialTheme.shapes.large,
+            title = { Text("Login") },
+            text = {
+                if (errorMessage != null) {
+                    Text(text = errorMessage)
+                } else {
+                    Text(text = "Please choose a login method.")
+                }
+            },
+            confirmButton = {
+                TextButton(onClick = onInitiateSsoLogin) {
+                    Text("Login with Nextcloud SSO")
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = onDismissRequest) {
+                    Text("Cancel")
+                }
+            },
+            modifier = Modifier
+        )
+    }
+}
+
+@Composable
+fun LoginDialogContent(
+    onInitiateSsoLogin: () -> Unit,
+    onDismissRequest: () -> Unit,
+    errorMessage: String? = null
+) {
+    Surface(
+        shape = MaterialTheme.shapes.large,
+        color = MaterialTheme.colors.surface,
+        contentColor = contentColorFor(MaterialTheme.colors.surface)
+    ) {
+        Column(modifier = Modifier.padding(24.dp)) {
+            Text(
+                text = "Login",
+                style = MaterialTheme.typography.h6,
+                modifier = Modifier.padding(bottom = 16.dp)
+            )
+
+            if (errorMessage != null) {
+                Text(text = errorMessage)
+            } else {
+                Text(text = "Please choose a login method.")
+            }
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.End
+            ) {
+                TextButton(onClick = onDismissRequest) {
+                    Text("Cancel")
+                }
+                TextButton(onClick = onInitiateSsoLogin) {
+                    Text("Login with Nextcloud SSO")
+                }
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun LoginDialogPreview() {
+    MaterialTheme {
+        LoginDialogContent(
+            onDismissRequest = {},
+            onInitiateSsoLogin = {}
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun LoginDialogErrorPreview() {
+    MaterialTheme {
+        LoginDialogContent(
+            onDismissRequest = {},
+            onInitiateSsoLogin = {},
+            errorMessage = "Invalid credentials. Please try again."
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/bill_edit/EditBillActivity.kt

@@ -0,0 +1,462 @@
+package net.helcel.cowspent.android.bill_edit
+
+import android.app.DatePickerDialog
+import android.app.TimePickerDialog
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
+import androidx.activity.compose.setContent
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.runtime.remember
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.QrCodeScannerActivity
+import net.helcel.cowspent.android.helper.showToast
+import net.helcel.cowspent.android.main.MainConstants
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBBillOwer
+import net.helcel.cowspent.model.DBProject
+import net.helcel.cowspent.model.ProjectType
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.theme.ThemeUtils
+import net.helcel.cowspent.util.BillParser
+import net.helcel.cowspent.util.CategoryUtils
+import java.text.ParseException
+import java.time.ZoneId
+import java.util.Calendar
+
+class EditBillActivity : AppCompatActivity() {
+
+    private val viewModel: EditBillViewModel by viewModels()
+    private lateinit var db: CowspentSQLiteOpenHelper
+    private lateinit var bill: DBBill
+    private var projectType: ProjectType = ProjectType.LOCAL
+    private val calendar = Calendar.getInstance()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        db = CowspentSQLiteOpenHelper.getInstance(this)
+
+        lifecycleScope.launch {
+            initBill()
+
+            setContent {
+                ThemeUtils.CowspentTheme {
+
+                    val categories = remember {
+                        val syncedCategories = db.getCategories(bill.projectId)
+                        val defaultCategories = CategoryUtils.getDefaultCategories(this@EditBillActivity, bill.projectId)
+                        val hardcoded = if (projectType == ProjectType.LOCAL) {
+                            defaultCategories
+                        } else {
+                            listOfNotNull(defaultCategories.find { it.remoteId.toInt() == DBBill.CATEGORY_REIMBURSEMENT })
+                        }
+                        syncedCategories + hardcoded
+                    }
+                    val paymentModes = remember {
+                        val syncedPaymentModes = db.getPaymentModes(bill.projectId)
+                        val defaultPaymentModes = CategoryUtils.getDefaultPaymentModes(this@EditBillActivity, bill.projectId)
+                        if (projectType == ProjectType.LOCAL) {
+                            syncedPaymentModes + defaultPaymentModes
+                        } else {
+                            syncedPaymentModes.ifEmpty { defaultPaymentModes }
+                        }
+                    }
+
+                    EditBillScreen(
+                        viewModel = viewModel,
+                        categories = categories,
+                        paymentModes = paymentModes,
+                        onSave = { saveBillAsked() },
+                        onBack = { onBack() },
+                        onDateClick = {
+                            DatePickerDialog(
+                                this@EditBillActivity,
+                                { _, year, month, day ->
+                                    calendar[Calendar.YEAR] = year
+                                    calendar[Calendar.MONTH] = month
+                                    calendar[Calendar.DAY_OF_MONTH] = day
+                                    viewModel.timestamp = calendar.timeInMillis / 1000
+                                },
+                                calendar[Calendar.YEAR],
+                                calendar[Calendar.MONTH],
+                                calendar[Calendar.DAY_OF_MONTH]
+                            ).show()
+                        },
+                        onTimeClick = {
+                            TimePickerDialog(
+                                this@EditBillActivity,
+                                { _, hour, minute ->
+                                    calendar[Calendar.HOUR_OF_DAY] = hour
+                                    calendar[Calendar.MINUTE] = minute
+                                    viewModel.timestamp = calendar.timeInMillis / 1000
+                                },
+                                calendar[Calendar.HOUR_OF_DAY],
+                                calendar[Calendar.MINUTE],
+                                true
+                            ).show()
+                        },
+                        onScan = {
+                            val createIntent = Intent(this@EditBillActivity, QrCodeScannerActivity::class.java)
+                            scanQRCodeLauncher.launch(createIntent)
+                        },
+                        onDelete = if (bill.id > 0) { { deleteBillAsked() } } else null,
+                        accessLevel = db.getProject(bill.projectId)?.myAccessLevel ?: DBProject.ACCESS_LEVEL_ADMIN
+                    )
+                }
+            }
+        }
+
+        onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                onBack()
+            }
+        })
+    }
+
+    private suspend fun initBill() {
+        val billId = intent.getLongExtra(PARAM_BILL_ID, 0)
+        val groupedBillIds = intent.getLongArrayExtra(PARAM_GROUPED_BILL_IDS)
+        val projectId = intent.getLongExtra(PARAM_PROJECT_ID, 0)
+        val projectTypeStr = intent.getStringExtra(PARAM_PROJECT_TYPE)
+        projectType = if (!projectTypeStr.isNullOrEmpty()) {
+            ProjectType.getTypeById(projectTypeStr) ?: ProjectType.LOCAL
+        } else {
+            ProjectType.LOCAL
+        }
+
+        withContext(Dispatchers.IO) {
+            var customSplits: Map<Long, Double>? = null
+            if (groupedBillIds != null && groupedBillIds.isNotEmpty()) {
+                val sourceBills: List<DBBill> = groupedBillIds.map { db.getBill(it) }.filterNotNull()
+                if (sourceBills.isNotEmpty()) {
+                    val first = sourceBills[0]
+                    val totalAmount = sourceBills.sumOf { it.amount }
+                    bill = DBBill(
+                        first.id, 0, first.projectId, first.payerId, totalAmount,
+                        first.timestamp, first.what, first.state, first.repeat,
+                        first.paymentMode, first.categoryRemoteId, first.comment, first.paymentModeRemoteId
+                    )
+                    
+                    val splits = mutableMapOf<Long, Double>()
+                    for (b in sourceBills) {
+                        val owersCount = b.billOwers.size
+                        if (owersCount > 0) {
+                            val part = b.amount / owersCount
+                            for (ower in b.billOwers) {
+                                splits[ower.memberId] = (splits[ower.memberId] ?: 0.0) + part
+                            }
+                        }
+                    }
+                    customSplits = splits
+                }
+            } else if (billId > 0) {
+                bill = db.getBill(billId)!!
+            } else {
+                val billIdToDuplicate = intent.getLongExtra(PARAM_BILL_ID_TO_DUPLICATE, 0)
+                val timeNowSeconds = System.currentTimeMillis() / 1000
+                if (billIdToDuplicate == 0L) {
+                    bill = DBBill(
+                        0, 0, projectId, 0, 0.0, timeNowSeconds,
+                        "", DBBill.STATE_ADDED, DBBill.NON_REPEATED,
+                        DBBill.PAYMODE_NONE, DBBill.CATEGORY_NONE, "", DBBill.PAYMODE_ID_NONE
+                    )
+                } else {
+                    val btd = db.getBill(billIdToDuplicate)!!
+                    bill = DBBill(
+                        0, 0, projectId, btd.payerId, btd.amount,
+                        timeNowSeconds, btd.what, DBBill.STATE_ADDED,
+                        btd.repeat, btd.paymentMode, btd.categoryRemoteId,
+                        btd.comment, btd.paymentModeRemoteId
+                    )
+                    val btdOwers = btd.billOwers
+                    val newBillOwers = btdOwers.filter {
+                        val m = db.getMember(it.memberId)
+                        m != null && m.isActivated
+                    }
+                    bill.billOwers = newBillOwers
+                }
+            }
+            calendar.timeInMillis = bill.timestamp * 1000
+            val members = db.getMembersOfProject(bill.projectId, null)
+            val project = db.getProject(bill.projectId)
+            val currencies = db.getCurrencies(bill.projectId)
+            withContext(Dispatchers.Main) {
+                viewModel.currencies = currencies
+                viewModel.mainCurrencyName = project?.currencyName ?: ""
+                viewModel.initFromBill(bill, members, customSplits)
+            }
+        }
+    }
+
+    private val scanQRCodeLauncher =
+        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+            if (result.resultCode == RESULT_OK && result.data != null) {
+                val scannedBill = result.data?.getStringExtra(MainConstants.KEY_QR_CODE)
+                if (scannedBill != null) {
+                    try {
+                        val austrianBill = BillParser.parseAustrianBillFromQrCode(scannedBill)
+                        calendar.timeInMillis = austrianBill.date.time
+                        viewModel.timestamp = calendar.timeInMillis / 1000
+                        viewModel.amount = austrianBill.amount.toString()
+                        return@registerForActivityResult
+                    } catch (_: ParseException) {
+                    }
+                    try {
+                        val croatianBill = BillParser.parseCroatianBillFromQrCode(scannedBill)
+                        if (croatianBill.date != null) {
+                            calendar.timeInMillis =
+                                croatianBill.date.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli()
+                            viewModel.timestamp = calendar.timeInMillis / 1000
+                        }
+                        viewModel.amount = croatianBill.amount.toString()
+                        return@registerForActivityResult
+                    } catch (_: ParseException) {
+                    }
+                    showToast(this, getString(R.string.error_scanning_bill_qr_code))
+                }
+            }
+        }
+
+    private fun onBack() {
+        if (!valuesHaveChanged()) {
+            finish()
+            return
+        }
+        viewModel.showDialog(
+            title = getString(R.string.save_or_discard_bill_dialog_title),
+            message = getString(R.string.save_or_discard_bill_dialog_message),
+            positiveText = getString(R.string.save_or_discard_bill_dialog_save),
+            onConfirm = { saveBillAsked() },
+            negativeText = getString(R.string.save_or_discard_bill_dialog_discard),
+            onCancel = { finish() }
+        )
+    }
+
+    private fun saveBillAsked() {
+        val validationError = viewModel.getValidationError(
+            getString(R.string.error_invalid_bill_what),
+            getString(R.string.error_invalid_bill_date),
+            getString(R.string.error_invalid_bill_payerid),
+            getString(R.string.error_invalid_bill_owers),
+            getString(R.string.simple_error)
+        )
+
+        if (validationError != null) {
+            showToast(this, validationError)
+        } else {
+            lifecycleScope.launch {
+                val savedBillId = withContext(Dispatchers.IO) { saveBill() }
+                val data = Intent()
+                data.putExtra(MainConstants.SAVED_BILL_ID, savedBillId)
+                setResult(RESULT_OK, data)
+                finish()
+            }
+        }
+    }
+
+    private fun deleteBillAsked() {
+        viewModel.showDialog(
+            title = getString(R.string.confirm_remove_project_dialog_title),
+            message = bill.what,
+            positiveText = getString(R.string.action_delete),
+            onConfirm = {
+                lifecycleScope.launch {
+                    withContext(Dispatchers.IO) {
+                        val groupedBillIds = intent.getLongArrayExtra(PARAM_GROUPED_BILL_IDS)
+                        if (groupedBillIds != null && groupedBillIds.isNotEmpty()) {
+                            for (id in groupedBillIds) {
+                                db.setBillState(id, DBBill.STATE_DELETED)
+                            }
+                        } else if (bill.id > 0) {
+                            db.setBillState(bill.id, DBBill.STATE_DELETED)
+                        }
+                        val proj = db.getProject(bill.projectId)
+                        if (proj != null) db.syncIfRemote(proj)
+                    }
+                    val data = Intent()
+                    data.putExtra(MainConstants.DELETED_BILL, bill.id)
+                    setResult(RESULT_OK, data)
+                    finish()
+                }
+            },
+            negativeText = getString(R.string.simple_cancel)
+        )
+    }
+
+    private fun valuesHaveChanged(): Boolean {
+        val newOwersIds = viewModel.getOwersIds().toSet()
+        val billOwersIds = bill.billOwersIds.toSet()
+        val owersChanged = newOwersIds != billOwersIds
+
+        return !(bill.what == viewModel.what &&
+                bill.timestamp == viewModel.timestamp &&
+                bill.amount == viewModel.amountAsDouble &&
+                bill.payerId == viewModel.payerId &&
+                bill.comment == viewModel.comment &&
+                bill.repeat == viewModel.repeat &&
+                bill.categoryRemoteId == viewModel.categoryRemoteId &&
+                bill.paymentModeRemoteId == viewModel.paymentModeRemoteId &&
+                !owersChanged)
+    }
+
+    private suspend fun saveBill(): Long = withContext(Dispatchers.IO) {
+        val groupedBillIds = intent.getLongArrayExtra(PARAM_GROUPED_BILL_IDS)
+        val isCustomSplit = viewModel.isCustomSplit
+
+        if (isCustomSplit) {
+            val splits = viewModel.owersCustomSplit.filter { (id, amount) ->
+                viewModel.owersSelection[id] == true && (amount.replace(',', '.').toDoubleOrNull()
+                    ?: 0.0) > 0
+            }.mapValues { it.value.replace(',', '.').toDoubleOrNull() ?: 0.0 }
+
+            if (splits.isEmpty()) return@withContext 0L
+
+            val splitEntries = splits.entries.toList()
+
+            // Pool of existing bills in this group that we can potentially reuse
+            val billsToPool = mutableListOf<Long>()
+            if (bill.id != 0L) billsToPool.add(bill.id)
+            groupedBillIds?.forEach { if (it != bill.id) billsToPool.add(it) }
+
+            val processedBillIds = mutableSetOf<Long>()
+            var firstSavedId = 0L
+
+            for (entry in splitEntries) {
+                val memberId = entry.key
+                val amount = entry.value
+
+                // Try to find a bill in the pool that already exists for this exact member
+                var billToUseId = billsToPool.find { id ->
+                    val b = db.getBill(id)
+                    b?.billOwers?.size == 1 && b.billOwers[0].memberId == memberId
+                }
+
+                // Fallback: just take any available bill from the pool
+                if (billToUseId == null) {
+                    billToUseId = billsToPool.firstOrNull()
+                }
+
+                if (billToUseId != null) {
+                    billsToPool.remove(billToUseId)
+                    processedBillIds.add(billToUseId)
+
+                    val existingBill = db.getBill(billToUseId)!!
+                    db.updateBillAndSync(
+                        existingBill,
+                        viewModel.payerId,
+                        amount,
+                        viewModel.timestamp,
+                        viewModel.what,
+                        listOf(memberId),
+                        viewModel.repeat,
+                        existingBill.paymentMode,
+                        viewModel.paymentModeRemoteId,
+                        viewModel.categoryRemoteId,
+                        viewModel.comment
+                    )
+                    if (firstSavedId == 0L) firstSavedId = billToUseId
+                } else {
+                    // Create a new bill for this payee
+                    val newBill = DBBill(
+                        0, 0, bill.projectId, viewModel.payerId, amount,
+                        viewModel.timestamp, viewModel.what, DBBill.STATE_ADDED, viewModel.repeat,
+                        bill.paymentMode, viewModel.categoryRemoteId, viewModel.comment, viewModel.paymentModeRemoteId
+                    )
+                    newBill.billOwers = listOf(DBBillOwer(0, 0, memberId))
+                    val newId = db.addBill(newBill)
+                    if (firstSavedId == 0L) firstSavedId = newId
+                }
+            }
+
+            // Mark any remaining bills in the original group as deleted
+            for (id in billsToPool) {
+                db.setBillState(id, DBBill.STATE_DELETED)
+            }
+
+            val proj = db.getProject(bill.projectId)
+            if (proj != null) db.syncIfRemote(proj)
+            db.updateProject(
+                bill.projectId,
+                null,
+                null,
+                null,
+                viewModel.payerId,
+                null,
+                null,
+                null,
+                null,
+                null
+            )
+
+            return@withContext firstSavedId
+        } else {
+            val newAmount = viewModel.amountAsDouble
+            val newOwersIds = viewModel.getOwersIds()
+
+            if (bill.id != 0L) {
+                if (valuesHaveChanged()) {
+                    db.updateBillAndSync(
+                        bill,
+                        viewModel.payerId,
+                        newAmount,
+                        viewModel.timestamp,
+                        viewModel.what,
+                        newOwersIds,
+                        viewModel.repeat,
+                        bill.paymentMode,
+                        viewModel.paymentModeRemoteId,
+                        viewModel.categoryRemoteId,
+                        viewModel.comment
+                    )
+                    if (groupedBillIds != null) {
+                        for (id in groupedBillIds) {
+                            if (id != bill.id) {
+                                db.setBillState(id, DBBill.STATE_DELETED)
+                            }
+                        }
+                        val proj = db.getProject(bill.projectId)
+                        if (proj != null) db.syncIfRemote(proj)
+                    }
+                }
+                return@withContext bill.id
+            } else {
+                val newBill = DBBill(
+                    0, 0, bill.projectId, viewModel.payerId, newAmount,
+                    viewModel.timestamp, viewModel.what, DBBill.STATE_ADDED, viewModel.repeat,
+                    bill.paymentMode, viewModel.categoryRemoteId, viewModel.comment, viewModel.paymentModeRemoteId
+                )
+                newOwersIds.forEach { newBill.billOwers += DBBillOwer(0, 0, it) }
+                val newBillId = db.addBill(newBill)
+                db.updateProject(
+                    bill.projectId,
+                    null,
+                    null,
+                    null,
+                    viewModel.payerId,
+                    null,
+                    null,
+                    null,
+                    null,
+                    null
+                )
+                val proj = db.getProject(bill.projectId)
+                if (proj != null) db.syncIfRemote(proj)
+                return@withContext newBillId
+            }
+        }
+    }
+
+    companion object {
+        const val PARAM_BILL_ID = "billId"
+        const val PARAM_GROUPED_BILL_IDS = "grouped_bill_ids"
+        const val PARAM_PROJECT_ID = "projectId"
+        const val PARAM_PROJECT_TYPE = "projectType"
+        const val PARAM_BILL_ID_TO_DUPLICATE = "billToDuplicate"
+    }
+}

app/src/main/java/net/helcel/cowspent/android/bill_edit/EditBillScreen.kt

@@ -0,0 +1,604 @@
+package net.helcel.cowspent.android.bill_edit
+
+import android.annotation.SuppressLint
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.BasicTextField
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.automirrored.filled.Comment
+import androidx.compose.material.icons.filled.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.scale
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.SolidColor
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.VisualTransformation
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.*
+import net.helcel.cowspent.model.*
+import net.helcel.cowspent.util.SupportUtil
+import java.util.Date
+import kotlin.math.abs
+
+@OptIn(ExperimentalMaterialApi::class)
+@Composable
+fun EditBillScreen(
+    viewModel: EditBillViewModel,
+    categories: List<DBCategory>,
+    paymentModes: List<DBPaymentMode>,
+    onSave: () -> Unit,
+    onBack: () -> Unit,
+    onDateClick: () -> Unit,
+    onTimeClick: () -> Unit,
+    onScan: () -> Unit,
+    onDelete: (() -> Unit)? = null,
+    accessLevel: Int = DBProject.ACCESS_LEVEL_ADMIN
+) {
+    val canEdit = accessLevel == DBProject.ACCESS_LEVEL_UNKNOWN || accessLevel >= DBProject.ACCESS_LEVEL_PARTICIPANT
+    val context = LocalContext.current
+
+    StatefulAlertDialog(
+        state = viewModel.dialogState,
+        onDismissRequest = { viewModel.dismissDialog() }
+    )
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(if (viewModel.what.isEmpty()) R.string.simple_new_bill else R.string.simple_edit_bill)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                actions = {
+                    if (canEdit) {
+                        IconButton(onClick = onScan) {
+                            Icon(Icons.Default.QrCodeScanner, contentDescription = null)
+                        }
+                        if (onDelete != null) {
+                            IconButton(onClick = onDelete) {
+                                Icon(Icons.Default.Delete, contentDescription = stringResource(R.string.action_delete))
+                            }
+                        }
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.primary,
+                elevation = 0.dp
+            )
+        },
+        floatingActionButton = {
+            if (canEdit) {
+                val errorWhat = stringResource(R.string.error_invalid_bill_what)
+                val errorDate = stringResource(R.string.error_invalid_bill_date)
+                val errorPayer = stringResource(R.string.error_invalid_bill_payerid)
+                val errorOwers = stringResource(R.string.error_invalid_bill_owers)
+                val errorInvalidForm = stringResource(R.string.simple_error)
+
+                FloatingActionButton(onClick = {
+                    val validationError = viewModel.getValidationError(
+                        errorWhat, errorDate, errorPayer, errorOwers, errorInvalidForm
+                    )
+                    if (validationError == null) {
+                        onSave()
+                    } else {
+                        showToast(context, validationError)
+                    }
+                }) {
+                    Icon(
+                        Icons.Default.Done,
+                        contentDescription = stringResource(R.string.action_save_bill)
+                    )
+                }
+            }
+        }
+    ) { padding ->
+        val scrollState = rememberScrollState()
+        Column(
+            modifier = Modifier
+                .padding(padding)
+                .padding(16.dp)
+                .fillMaxSize()
+                .verticalScroll(scrollState)
+        ) {
+            BillBasicInfoSection(
+                viewModel = viewModel,
+                canEdit = canEdit,
+                onDateClick = onDateClick,
+                onTimeClick = onTimeClick
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            PayerSection(
+                viewModel = viewModel,
+                canEdit = canEdit
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            OwerSelectionSection(
+                viewModel = viewModel,
+                canEdit = canEdit
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            BillAdditionalDetailsSection(
+                viewModel = viewModel,
+                categories = categories,
+                paymentModes = paymentModes,
+                canEdit = canEdit
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+        }
+    }
+}
+
+@Composable
+fun BillBasicInfoSection(
+    viewModel: EditBillViewModel,
+    canEdit: Boolean,
+    onDateClick: () -> Unit,
+    onTimeClick: () -> Unit
+) {
+    val context = LocalContext.current
+    val currencyDialogTitle =
+        stringResource(R.string.currency_dialog_title, viewModel.mainCurrencyName)
+    val noCurrencyError = stringResource(R.string.no_currency_error)
+
+    OutlinedTextField(
+        value = viewModel.what,
+        onValueChange = { viewModel.what = it },
+        enabled = canEdit,
+        placeholder = { Text(stringResource(R.string.setting_what)) },
+        modifier = Modifier.fillMaxWidth(),
+        leadingIcon = { Icon(Icons.Default.Title, contentDescription = null) }
+    )
+
+    Spacer(modifier = Modifier.height(8.dp))
+
+    OutlinedTextField(
+        value = viewModel.amount,
+        onValueChange = {
+            viewModel.amount = it
+            viewModel.updateSplits()
+        },
+        enabled = canEdit,
+        placeholder = { Text("0") },
+        modifier = Modifier.fillMaxWidth(),
+        leadingIcon = { Icon(Icons.Default.AttachMoney, contentDescription = null) },
+        trailingIcon = {
+            IconButton(
+                enabled = canEdit,
+                onClick = {
+                    if (viewModel.currencies.isNotEmpty()) {
+                        viewModel.showDialog(
+                            title = currencyDialogTitle,
+                            items = viewModel.currencies.map { "${it.name} (${it.exchangeRate})" },
+                            onItemSelected = { index ->
+                                viewModel.convertCurrency(viewModel.currencies[index])
+                            }
+                        )
+                    } else {
+                        showToast(context, noCurrencyError)
+                    }
+                }
+            ) {
+                Icon(Icons.Default.CurrencyExchange, contentDescription = null)
+            }
+        },
+        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number)
+    )
+
+    Spacer(modifier = Modifier.height(8.dp))
+
+    val dateFormat =
+        remember(context) { android.text.format.DateFormat.getDateFormat(context) }
+    val timeFormat =
+        remember(context) { android.text.format.DateFormat.getTimeFormat(context) }
+    val dateStr = dateFormat.format(Date(viewModel.timestamp * 1000))
+    val timeStr = timeFormat.format(Date(viewModel.timestamp * 1000))
+
+    Row {
+        ClickableOutlinedTextField(
+            value = dateStr,
+            onClick = onDateClick,
+            modifier = Modifier.weight(1f),
+            enabled = canEdit,
+            leadingIcon = { Icon(Icons.Default.Event, contentDescription = null) }
+        )
+        Spacer(modifier = Modifier.width(8.dp))
+        ClickableOutlinedTextField(
+            value = timeStr,
+            onClick = onTimeClick,
+            modifier = Modifier.weight(1f),
+            enabled = canEdit,
+            leadingIcon = { Icon(Icons.Default.AccessTime, contentDescription = null) }
+        )
+    }
+}
+
+@Composable
+fun PayerSection(
+    viewModel: EditBillViewModel,
+    canEdit: Boolean
+) {
+    var payerExpanded by remember { mutableStateOf(false) }
+    val selectedPayer = viewModel.members.find { it.id == viewModel.payerId }
+
+    EditableExposedDropdownMenu(
+        value = selectedPayer?.name ?: "",
+        placeholder = stringResource(R.string.setting_payer),
+        expanded = payerExpanded,
+        onExpandedChange = { payerExpanded = it },
+        onDismissRequest = { payerExpanded = false },
+        enabled = canEdit,
+        leadingIcon = {
+            Box(modifier = Modifier.padding(start = 12.dp)) {
+                if (selectedPayer != null) {
+                    UserAvatar(
+                        name = selectedPayer.name,
+                        r = selectedPayer.r,
+                        g = selectedPayer.g,
+                        b = selectedPayer.b,
+                        disabled = !selectedPayer.isActivated,
+                        size = 24.dp
+                    )
+                } else {
+                    Icon(Icons.Default.Person, contentDescription = null)
+                }
+            }
+        },
+        content = {
+            viewModel.members.forEach { member ->
+                DropdownMenuItem(onClick = {
+                    viewModel.payerId = member.id
+                    payerExpanded = false
+                }) {
+                    UserAvatar(
+                        name = member.name,
+                        r = member.r,
+                        g = member.g,
+                        b = member.b,
+                        disabled = !member.isActivated,
+                        size = 24.dp
+                    )
+                    Spacer(modifier = Modifier.width(8.dp))
+                    Text(member.name)
+                }
+            }
+        }
+    )
+}
+
+@Composable
+fun OwerSelectionSection(
+    viewModel: EditBillViewModel,
+    canEdit: Boolean
+) {
+    Row(
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        Spacer(modifier = Modifier.width(8.dp))
+        if (viewModel.owersSelection.all { it.value }) {
+            IconButton(
+                enabled = canEdit,
+                onClick = {
+                    viewModel.members.forEach { viewModel.owersSelection[it.id] = false }
+                    viewModel.updateSplits()
+                },
+                modifier = Modifier.size(32.dp)
+            ) {
+                Icon(
+                    Icons.Default.RemoveDone,
+                    contentDescription = stringResource(R.string.setting_none),
+                    modifier = Modifier.scale(0.8f)
+                )
+            }
+        } else {
+            IconButton(
+                enabled = canEdit,
+                onClick = {
+                    viewModel.members.forEach { viewModel.owersSelection[it.id] = true }
+                    viewModel.updateSplits()
+                },
+                modifier = Modifier.size(32.dp)
+            ) {
+                Icon(
+                    Icons.Default.DoneAll,
+                    contentDescription = stringResource(R.string.setting_all),
+                    modifier = Modifier.scale(0.8f)
+                )
+            }
+        }
+        Spacer(modifier = Modifier.width(8.dp))
+        Text(
+            stringResource(R.string.setting_owers), fontSize = 12.sp,
+            color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f)
+        )
+        Spacer(Modifier.weight(1f))
+
+        if (viewModel.isCustomSplit) {
+            val diff = viewModel.getDiffSplit()
+            if (abs(diff) > 0.01) {
+                val diffText =
+                    if (diff > 0) "Missing: ${SupportUtil.normalNumberFormat.format(diff)}" else "Excess: ${
+                        SupportUtil.normalNumberFormat.format(-diff)
+                    }"
+                Text(
+                    diffText,
+                    color = MaterialTheme.colors.error,
+                    fontSize = 12.sp,
+                    modifier = Modifier.padding(horizontal = 16.dp)
+                )
+            }
+        } else {
+            Text("Even Split", fontSize = 12.sp)
+        }
+        Switch(
+            checked = !viewModel.isCustomSplit,
+            enabled = canEdit,
+            onCheckedChange = {
+                viewModel.isCustomSplit = !it
+                viewModel.updateSplits()
+            },
+            colors = SwitchDefaults.colors(
+                uncheckedThumbColor = MaterialTheme.colors.onSurface,
+            )
+        )
+    }
+
+    viewModel.members.forEach { member ->
+        val isSelected = viewModel.owersSelection[member.id] ?: false
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier
+                .fillMaxWidth()
+                .clickable(enabled = canEdit) {
+                    viewModel.toggleMember(member.id, !isSelected)
+                }
+
+        ) {
+            Checkbox(
+                checked = isSelected,
+                enabled = canEdit,
+                onCheckedChange = { viewModel.toggleMember(member.id, it) }
+            )
+            UserAvatar(
+                name = member.name,
+                r = member.r,
+                g = member.g,
+                b = member.b,
+                disabled = !member.isActivated,
+                size = 32.dp
+            )
+            Spacer(modifier = Modifier.width(8.dp))
+            Text(member.name, modifier = Modifier.weight(1f))
+
+            if (isSelected || viewModel.isCustomSplit) {
+                val interactionSource = remember { MutableInteractionSource() }
+                BasicTextField(
+                    value = viewModel.owersCustomSplit[member.id] ?: "",
+                    onValueChange = {
+                        viewModel.owersCustomSplit[member.id] = it
+                        viewModel.owersSelection[member.id] = (it != "")
+                    },
+                    modifier = Modifier
+                        .width(80.dp)
+                        .height(46.dp),
+                    interactionSource = interactionSource,
+                    singleLine = true,
+                    enabled = viewModel.isCustomSplit && canEdit,
+                    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                    cursorBrush = SolidColor(MaterialTheme.colors.onSurface),
+                    textStyle = LocalTextStyle.current.copy(
+                        textAlign = TextAlign.Right,
+                        color = MaterialTheme.colors.onSurface
+                    ),
+                ) { innerTextField ->
+                    TextFieldDefaults.OutlinedTextFieldDecorationBox(
+                        value = viewModel.owersCustomSplit[member.id] ?: "",
+                        visualTransformation = VisualTransformation.None,
+                        innerTextField = innerTextField,
+                        singleLine = true,
+                        enabled = viewModel.isCustomSplit && canEdit,
+                        interactionSource = interactionSource,
+                        contentPadding = PaddingValues(horizontal = 12.dp, vertical = 0.dp),
+                        colors = TextFieldDefaults.textFieldColors(
+                            cursorColor = MaterialTheme.colors.onSurface,
+                            backgroundColor = Color.Transparent,
+                            unfocusedIndicatorColor = Color.Transparent,
+                            disabledIndicatorColor = Color.Transparent
+                        )
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun BillAdditionalDetailsSection(
+    viewModel: EditBillViewModel,
+    categories: List<DBCategory>,
+    paymentModes: List<DBPaymentMode>,
+    canEdit: Boolean
+) {
+    var categoryExpanded by remember { mutableStateOf(false) }
+    val selectedCategory =
+        categories.find { it.remoteId.toInt() == viewModel.categoryRemoteId }
+
+    EditableExposedDropdownMenu(
+        value = selectedCategory?.name ?: "",
+        placeholder = stringResource(R.string.setting_category),
+        expanded = categoryExpanded,
+        onExpandedChange = { categoryExpanded = it },
+        onDismissRequest = { categoryExpanded = false },
+        enabled = canEdit,
+        leadingIcon = {
+            Box(modifier = Modifier.padding(start = 12.dp)) {
+                if (selectedCategory != null) {
+                    Text(text = selectedCategory.icon, fontSize = 20.sp)
+                } else {
+                    Icon(Icons.Default.Category, contentDescription = null)
+                }
+            }
+        },
+        content = {
+            DropdownMenuItem(onClick = {
+                viewModel.categoryRemoteId = 0
+                categoryExpanded = false
+            }) {
+                Icon(Icons.Default.Close, tint = Color.Red, contentDescription = null)
+                Spacer(modifier = Modifier.width(12.dp))
+                Text(stringResource(R.string.category_none))
+            }
+            categories.forEach { category ->
+                DropdownMenuItem(onClick = {
+                    viewModel.categoryRemoteId = category.remoteId.toInt()
+                    categoryExpanded = false
+                }) {
+                    Text(text = category.icon, fontSize = 20.sp)
+                    Spacer(modifier = Modifier.width(12.dp))
+                    Text(category.name ?: "")
+                }
+            }
+        }
+    )
+
+    Spacer(modifier = Modifier.height(8.dp))
+
+    var pmExpanded by remember { mutableStateOf(false) }
+    val selectedPm =
+        paymentModes.find { it.remoteId.toInt() == viewModel.paymentModeRemoteId }
+
+    EditableExposedDropdownMenu(
+        value = selectedPm?.name ?: "",
+        placeholder = stringResource(R.string.setting_payment_mode),
+        expanded = pmExpanded,
+        onExpandedChange = { pmExpanded = it },
+        onDismissRequest = { pmExpanded = false },
+        enabled = canEdit,
+        leadingIcon = {
+            Box(modifier = Modifier.padding(start = 12.dp)) {
+                if (selectedPm != null) {
+                    Text(text = selectedPm.icon, fontSize = 20.sp)
+                } else {
+                    Icon(Icons.Default.Payment, contentDescription = null)
+                }
+            }
+        },
+        content = {
+            DropdownMenuItem(onClick = {
+                viewModel.paymentModeRemoteId = 0
+                pmExpanded = false
+            }) {
+                Icon(Icons.Default.Close, tint = Color.Red, contentDescription = null)
+                Spacer(modifier = Modifier.width(12.dp))
+                Text(stringResource(R.string.payment_mode_none))
+            }
+            paymentModes.forEach { pm ->
+                DropdownMenuItem(onClick = {
+                    viewModel.paymentModeRemoteId = pm.remoteId.toInt()
+                    pmExpanded = false
+                }) {
+                    Text(text = pm.icon, fontSize = 20.sp)
+                    Spacer(modifier = Modifier.width(12.dp))
+                    Text(pm.name ?: "")
+                }
+            }
+        }
+    )
+
+    Spacer(modifier = Modifier.height(8.dp))
+
+    val repeatOptions = listOf(
+        DBBill.NON_REPEATED to stringResource(R.string.repeat_no),
+        DBBill.REPEAT_DAY to stringResource(R.string.repeat_day),
+        DBBill.REPEAT_WEEK to stringResource(R.string.repeat_week),
+        DBBill.REPEAT_FORTNIGHT to stringResource(R.string.repeat_fortnight),
+        DBBill.REPEAT_MONTH to stringResource(R.string.repeat_month),
+        DBBill.REPEAT_YEAR to stringResource(R.string.repeat_year)
+    )
+    var repeatExpanded by remember { mutableStateOf(false) }
+    val selectedRepeat = repeatOptions.find { it.first == viewModel.repeat }
+
+    EditableExposedDropdownMenu(
+        value = selectedRepeat?.second ?: "",
+        placeholder = stringResource(R.string.setting_project_repetition),
+        expanded = repeatExpanded,
+        onExpandedChange = { repeatExpanded = it },
+        onDismissRequest = { repeatExpanded = false },
+        enabled = canEdit,
+        leadingIcon = { Icon(Icons.Default.Repeat, contentDescription = null) },
+        content = {
+            repeatOptions.forEach { (value, label) ->
+                DropdownMenuItem(onClick = {
+                    viewModel.repeat = value
+                    repeatExpanded = false
+                }) {
+                    Text(label)
+                }
+            }
+        }
+    )
+
+    Spacer(modifier = Modifier.height(8.dp))
+
+    OutlinedTextField(
+        value = viewModel.comment,
+        onValueChange = { viewModel.comment = it },
+        enabled = canEdit,
+        placeholder = { Text(stringResource(R.string.setting_comment)) },
+        modifier = Modifier.fillMaxWidth(),
+        singleLine = false,
+        leadingIcon = {
+            Icon(
+                Icons.AutoMirrored.Filled.Comment,
+                contentDescription = null
+            )
+        }
+    )
+}
+
+@SuppressLint("ViewModelConstructorInComposable")
+@Preview(showBackground = true)
+@Composable
+fun EditBillScreenPreview() {
+    MaterialTheme {
+        EditBillScreen(
+            viewModel = EditBillViewModel().apply {
+                what = "Pizza"
+                amount = "12.50"
+                members = listOf(
+                    DBMember(1, 0, 0, "Alice", true, 1.0, 0, null, null, null, null, null),
+                    DBMember(2, 0, 0, "Bob", true, 1.0, 0, null, null, null, null, null)
+                )
+            },
+            categories = emptyList(),
+            paymentModes = emptyList(),
+            onSave = {},
+            onBack = {},
+            onDateClick = {},
+            onTimeClick = {},
+            onScan = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/bill_edit/EditBillViewModel.kt

@@ -0,0 +1,224 @@
+package net.helcel.cowspent.android.bill_edit
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableLongStateOf
+import androidx.compose.runtime.mutableStateMapOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.android.helper.DialogState
+import net.helcel.cowspent.util.SupportUtil
+import net.helcel.cowspent.util.evalMath
+
+import net.helcel.cowspent.model.DBCurrency
+import androidx.compose.ui.graphics.vector.ImageVector
+
+class EditBillViewModel : ViewModel() {
+    var what by mutableStateOf("")
+    var amount by mutableStateOf("")
+    var comment by mutableStateOf("")
+    var timestamp by mutableLongStateOf(0L)
+    var payerId by mutableLongStateOf(0L)
+    var repeat by mutableStateOf(DBBill.NON_REPEATED)
+    var paymentModeRemoteId by mutableIntStateOf(0)
+    var categoryRemoteId by mutableIntStateOf(0)
+
+    var currencies by mutableStateOf<List<DBCurrency>>(emptyList())
+    var mainCurrencyName by mutableStateOf("")
+    var members by mutableStateOf<List<DBMember>>(emptyList())
+
+    var owersSelection = mutableStateMapOf<Long, Boolean>()
+    var isCustomSplit by mutableStateOf(false)
+    var owersCustomSplit = mutableStateMapOf<Long, String>()
+
+    var dialogState by mutableStateOf<DialogState?>(null)
+
+    val amountAsDouble: Double
+        get() {
+            val amountStr = amount.replace(',', '.')
+            return try {
+                if (amountStr.matches("[0-9.]+".toRegex())) {
+                    amountStr.toDouble()
+                } else {
+                    evalMath(amountStr)
+                }
+            } catch (_: Exception) {
+                0.0
+            }
+        }
+
+    fun getEvenSplit(): Double {
+        val selectedOwersCount = owersSelection.count { it.value }
+        return if (selectedOwersCount > 0) amountAsDouble / selectedOwersCount else 0.0
+    }
+
+    fun updateSplits() {
+        if (!isCustomSplit) {
+            val even = getEvenSplit()
+            val evenStr = if (even == 0.0) "" else SupportUtil.round2(even).toString()
+            members.forEach { m ->
+                if (owersSelection[m.id] == true) {
+                    owersCustomSplit[m.id] = evenStr
+                } else {
+                    owersCustomSplit.remove(m.id)
+                }
+            }
+        }
+    }
+
+    fun toggleMember(id: Long, selected: Boolean) {
+        owersSelection[id] = selected
+        if (isCustomSplit) {
+            if (selected) {
+                if (owersCustomSplit[id].isNullOrEmpty()) {
+                    owersCustomSplit[id] = "0"
+                }
+            } else {
+                owersCustomSplit.remove(id)
+            }
+        } else {
+            updateSplits()
+        }
+    }
+
+    fun getDiffSplit(): Double {
+        val customTotal = owersCustomSplit.entries
+            .filter { owersSelection[it.key] == true }
+            .sumOf { it.value.replace(',', '.').toDoubleOrNull() ?: 0.0 }
+        return amountAsDouble - customTotal
+    }
+
+    fun getOwersIds(): List<Long> {
+        return owersSelection.filter { it.value }.keys.toList()
+    }
+
+    fun showDialog(
+        title: String? = null,
+        message: String? = null,
+        icon: ImageVector? = null,
+        items: List<CharSequence>? = null,
+        positiveText: String? = null,
+        negativeText: String? = null,
+        neutralText: String? = null,
+        onConfirm: (() -> Unit)? = null,
+        onCancel: (() -> Unit)? = null,
+        onNeutral: (() -> Unit)? = null,
+        onItemSelected: ((Int) -> Unit)? = null
+    ) {
+        dialogState = DialogState(
+            title = title,
+            message = message,
+            icon = icon,
+            items = items,
+            positiveText = positiveText,
+            negativeText = negativeText,
+            neutralText = neutralText,
+            onConfirm = onConfirm,
+            onCancel = onCancel,
+            onNeutral = onNeutral,
+            onItemSelected = onItemSelected
+        )
+    }
+
+    fun dismissDialog() {
+        dialogState = null
+    }
+
+    fun convertCurrency(currency: DBCurrency) {
+        val originalAmountStr = amount
+        val originalAmount = amountAsDouble
+        if (originalAmount == 0.0) return
+
+        val newAmount = originalAmount / currency.exchangeRate
+        amount = SupportUtil.round2(newAmount).toString()
+
+        val currencyLabel = currency.name ?: ""
+        val conversionNote = "($originalAmountStr $currencyLabel)"
+        if (!comment.contains(conversionNote)) {
+            if (comment.isNotEmpty() && !comment.endsWith(" ")) {
+                comment += " "
+            }
+            comment += conversionNote
+        }
+
+        if (isCustomSplit) {
+            owersCustomSplit.keys.toList().forEach { id ->
+                val value = owersCustomSplit[id] ?: ""
+                val partAmount = value.replace(',', '.').toDoubleOrNull() ?: 0.0
+                if (partAmount != 0.0) {
+                    val newPartAmount = partAmount / currency.exchangeRate
+                    owersCustomSplit[id] = SupportUtil.round2(newPartAmount).toString()
+                }
+            }
+        }
+
+        updateSplits()
+    }
+
+    fun initFromBill(bill: DBBill, members: List<DBMember>, customSplits: Map<Long, Double>? = null) {
+        this.members = members
+        what = bill.what
+        amount = if (bill.amount == 0.0) "" else bill.amount.toString()
+        comment = bill.comment ?: ""
+        timestamp = bill.timestamp
+        payerId = bill.payerId
+        repeat = bill.repeat ?: DBBill.NON_REPEATED
+        paymentModeRemoteId = bill.paymentModeRemoteId
+        categoryRemoteId = bill.categoryRemoteId
+
+        owersSelection.clear()
+        owersCustomSplit.clear()
+
+        if (customSplits != null) {
+            isCustomSplit = true
+            for (member in members) {
+                val selected = customSplits.containsKey(member.id)
+                owersSelection[member.id] = selected
+                if (selected) {
+                    owersCustomSplit[member.id] = SupportUtil.round2(customSplits[member.id]!!).toString()
+                }
+            }
+        } else {
+            val billOwerIds = bill.billOwersIds
+            val selectedCount = billOwerIds.size
+            val evenSplit = if (selectedCount > 0) bill.amount / selectedCount else 0.0
+            val evenSplitStr = if (evenSplit == 0.0) "" else SupportUtil.round2(evenSplit).toString()
+
+            for (member in members) {
+                val selected = billOwerIds.contains(member.id)
+                owersSelection[member.id] = selected
+                if (selected) {
+                    owersCustomSplit[member.id] = evenSplitStr
+                }
+            }
+        }
+    }
+
+    fun isFormValid(): Boolean {
+        return what.isNotEmpty() && !what.contains(",") &&
+                timestamp != 0L &&
+                payerId != 0L &&
+                owersSelection.any { it.value }
+    }
+
+    fun getValidationError(
+        errorWhat: String,
+        errorDate: String,
+        errorPayer: String,
+        errorOwers: String,
+        errorInvalidForm: String
+    ): String? {
+        return when {
+            what.isEmpty() || what.contains(",") -> errorWhat
+            timestamp == 0L -> errorDate
+            payerId == 0L -> errorPayer
+            owersSelection.none { it.value } -> errorOwers
+            !isFormValid() -> errorInvalidForm
+            else -> null
+        }
+    }
+}
+

app/src/main/java/net/helcel/cowspent/android/bill_label/LabelBillsActivity.kt

@@ -0,0 +1,85 @@
+package net.helcel.cowspent.android.bill_label
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.compose.setContent
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.theme.ThemeUtils
+import net.helcel.cowspent.util.CategoryUtils
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.ProjectType
+
+class LabelBillsActivity : AppCompatActivity() {
+    private val viewModel: LabelBillsViewModel by viewModels()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val projectId = intent.getLongExtra(EXTRA_PROJECT_ID, -1L)
+        if (projectId == -1L) {
+            finish()
+            return
+        }
+
+        val db = CowspentSQLiteOpenHelper.getInstance(this)
+        
+        lifecycleScope.launch {
+            val (members, billsToLabel, categories, allCategorized) = withContext(Dispatchers.IO) {
+                val project = db.getProject(projectId)
+                val projectType = project?.type ?: ProjectType.LOCAL
+
+                val members = db.getMembersOfProject(projectId, null)
+                val allBills = db.getBillsOfProject(projectId)
+                val billsToLabel = allBills.filter { it.categoryRemoteId == 0 && it.state != DBBill.STATE_DELETED }
+                val allCategorized = allBills.filter { it.categoryRemoteId != 0 && it.state != DBBill.STATE_DELETED }
+                
+                val syncedCategories = db.getCategories(projectId)
+                val defaultCategories = CategoryUtils.getDefaultCategories(this@LabelBillsActivity, projectId)
+                val hardcoded = if (projectType == ProjectType.LOCAL) {
+                    defaultCategories
+                } else {
+                    listOfNotNull(defaultCategories.find { it.remoteId.toInt() == DBBill.CATEGORY_REIMBURSEMENT })
+                }
+                val categories = syncedCategories + hardcoded
+                
+                Quadruple(members, billsToLabel, categories, allCategorized)
+            }
+
+            viewModel.billsToLabel = billsToLabel
+            viewModel.categories = categories
+            viewModel.categoriesMap = categories.associateBy { it.remoteId }
+            viewModel.allCategorizedBills = allCategorized
+            viewModel.updateSuggestions()
+
+            setContent {
+                ThemeUtils.CowspentTheme {
+                    LabelBillsScreen(
+                        viewModel = viewModel,
+                        members = members,
+                        db = db,
+                        onBack = { finish() }
+                    )
+                }
+            }
+        }
+    }
+
+    private data class Quadruple<A, B, C, D>(val first: A, val second: B, val third: C, val fourth: D)
+
+    companion object {
+        const val EXTRA_PROJECT_ID = "extra_project_id"
+
+        fun createIntent(context: Context, projectId: Long): Intent {
+            return Intent(context, LabelBillsActivity::class.java).apply {
+                putExtra(EXTRA_PROJECT_ID, projectId)
+            }
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/bill_label/LabelBillsScreen.kt

@@ -0,0 +1,269 @@
+package net.helcel.cowspent.android.bill_label
+
+import android.annotation.SuppressLint
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.grid.GridCells
+import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
+import androidx.compose.foundation.lazy.grid.items
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBCategory
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.util.SupportUtil
+
+@Composable
+fun LabelBillsScreen(
+    viewModel: LabelBillsViewModel,
+    members: List<DBMember>,
+    db: CowspentSQLiteOpenHelper,
+    onBack: () -> Unit
+) {
+    val currentBill = viewModel.currentBill
+    val remainingCount = viewModel.billsToLabel.size - viewModel.currentBillIndex
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.label_bills_title)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.primary,
+            )
+        }
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .padding(16.dp),
+            horizontalAlignment = Alignment.CenterHorizontally
+        ) {
+            if (currentBill != null) {
+                BillSummaryCard(currentBill, members, remainingCount)
+                
+                Spacer(modifier = Modifier.height(8.dp))
+                Text(
+                    text = stringResource(R.string.label_bills_suggested),
+                    style = MaterialTheme.typography.subtitle1,
+                    fontWeight = FontWeight.Bold,
+                    modifier = Modifier.fillMaxWidth()
+                )
+                Spacer(modifier = Modifier.height(8.dp))
+                
+                val suggestions = viewModel.suggestedCategories
+                Box(modifier = Modifier.fillMaxWidth().height(64.dp), contentAlignment = Alignment.CenterStart) {
+                    if (suggestions.isNotEmpty()) {
+                        Row(
+                            modifier = Modifier.fillMaxWidth(),
+                            horizontalArrangement = Arrangement.spacedBy(8.dp)
+                        ) {
+                            suggestions.forEach { category ->
+                                Box(modifier = Modifier.weight(1f)) {
+                                    CategoryButton(
+                                        icon = category.icon,
+                                        name = category.name ?: "",
+                                        onClick = { viewModel.labelCurrentBill(db, category.remoteId.toInt()) }
+                                    )
+                                }
+                            }
+                            repeat(2 - suggestions.size) {
+                                Spacer(modifier = Modifier.weight(1f))
+                            }
+                        }
+                    } else {
+                        Text(
+                            text = stringResource(R.string.label_bills_no_suggestions),
+                            style = MaterialTheme.typography.caption,
+                            color = MaterialTheme.colors.onSurface.copy(alpha = 0.4f),
+                            modifier = Modifier.fillMaxWidth(),
+                            textAlign = TextAlign.Center
+                        )
+                    }
+                }
+
+                Spacer(modifier = Modifier.height(8.dp))
+
+                Text(
+                    text = stringResource(R.string.setting_category),
+                    style = MaterialTheme.typography.subtitle1,
+                    fontWeight = FontWeight.Bold,
+                    modifier = Modifier.fillMaxWidth()
+                )
+                
+                Spacer(modifier = Modifier.height(8.dp))
+                
+                LazyVerticalGrid(
+                    columns = GridCells.Fixed(2),
+                    modifier = Modifier.weight(1f),
+                    contentPadding = PaddingValues(4.dp),
+                    horizontalArrangement = Arrangement.spacedBy(8.dp),
+                    verticalArrangement = Arrangement.spacedBy(8.dp)
+                ) {
+                    items(viewModel.categories) { category ->
+                        CategoryButton(
+                            icon = category.icon,
+                            name = category.name ?: "",
+                            onClick = { viewModel.labelCurrentBill(db, category.remoteId.toInt()) }
+                        )
+                    }
+                }
+                
+                Spacer(modifier = Modifier.height(8.dp))
+                
+                Button(
+                    onClick = { viewModel.skipCurrentBill() },
+                    modifier = Modifier.width(128.dp),
+                    colors = ButtonDefaults.buttonColors(backgroundColor = Color.LightGray)
+                ) {
+                    Text(stringResource(R.string.label_bills_skip))
+                }
+                Spacer(modifier = Modifier.height(8.dp))
+            } else {
+                Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                    Text(stringResource(R.string.label_bills_no_more))
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun BillSummaryCard(bill: DBBill, members: List<DBMember>, remainingCount: Int) {
+    val payerName = remember(bill.payerId, members) {
+        members.find { it.id == bill.payerId }?.name ?: bill.payerId.toString()
+    }
+    val owersNames = remember(bill.billOwersIds, members) {
+        bill.billOwersIds.joinToString(", ") { id ->
+            members.find { it.id == id }?.name ?: id.toString()
+        }
+    }
+
+    Box {
+        Card(
+            elevation = 4.dp,
+            modifier = Modifier.fillMaxWidth().padding(top = 8.dp, start = 8.dp)
+        ) {
+            Column(modifier = Modifier.padding(16.dp)) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text(bill.what, maxLines = 2, style = MaterialTheme.typography.h5, fontWeight = FontWeight.Bold)
+                        if (!bill.comment.isNullOrEmpty()) {
+                            Text(bill.comment!!, style = MaterialTheme.typography.body2, color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f))
+                        }
+                    }
+                    Text(
+                        SupportUtil.normalNumberFormat.format(bill.amount),
+                        style = MaterialTheme.typography.h5,
+                        fontWeight = FontWeight.Bold,
+                        color = MaterialTheme.colors.primary
+                    )
+                }
+                Spacer(modifier = Modifier.height(8.dp))
+                Divider()
+                Spacer(modifier = Modifier.height(8.dp))
+                Row(modifier = Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
+                    Text(
+                        text = "$payerName \u2192 $owersNames",
+                        style = MaterialTheme.typography.caption,
+                        modifier = Modifier.weight(1f),
+                        maxLines = 1,
+                        overflow = TextOverflow.Ellipsis
+                    )
+                    Text(
+                        text = bill.date,
+                        style = MaterialTheme.typography.caption
+                    )
+                }
+            }
+        }
+
+        Surface(
+            modifier = Modifier
+                .size(28.dp),
+            shape = CircleShape,
+            color = MaterialTheme.colors.primary,
+            elevation = 6.dp
+        ) {
+            Box(contentAlignment = Alignment.Center) {
+                Text(
+                    text = remainingCount.toString(),
+                    style = MaterialTheme.typography.caption,
+                    color = MaterialTheme.colors.onPrimary,
+                    fontWeight = FontWeight.Bold
+                )
+            }
+        }
+    }
+}
+
+@Composable
+fun CategoryButton(icon: String, name: String, onClick: () -> Unit) {
+    OutlinedButton(
+        onClick = onClick,
+        modifier = Modifier.fillMaxWidth().height(60.dp),
+        contentPadding = PaddingValues(2.dp)
+    ) {
+        Column(horizontalAlignment = Alignment.CenterHorizontally, verticalArrangement = Arrangement.Center) {
+            Text(icon, fontSize = 20.sp)
+            Text(
+                name,
+                fontSize = 11.sp,
+                textAlign = TextAlign.Center,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis
+            )
+        }
+    }
+}
+
+@SuppressLint("ViewModelConstructorInComposable")
+@Preview(showBackground = true)
+@Composable
+fun LabelBillsScreenPreview() {
+    val viewModel = LabelBillsViewModel().apply {
+        billsToLabel = listOf(
+            DBBill(1L, 0, 1L, 1L, 120.5, System.currentTimeMillis() / 1000, "Groceries at Aldi", 0, null, null, 0, null, -1)
+        )
+        val cats = listOf(
+            DBCategory(1, 1, 1, "Groceries", "🛒", ""),
+            DBCategory(2, 2, 1, "Leisure", "🥳", ""),
+            DBCategory(3, 3, 1, "Rent", "🏠", ""),
+            DBCategory(4, 4, 1, "Bills", "💸", "")
+        )
+        categories = cats
+        categoriesMap = cats.associateBy { it.remoteId }
+    }
+    val members = listOf(
+        DBMember(1L, 0, 1L, "Alice", true, 1.0, 0, 255, 100, 100, null, null),
+        DBMember(2L, 0, 1L, "Bob", true, 1.0, 0, 100, 255, 100, null, null)
+    )
+    MaterialTheme {
+        LabelBillsScreen(
+            viewModel = viewModel,
+            members = members,
+            db = CowspentSQLiteOpenHelper.getInstance(LocalContext.current),
+            onBack = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/bill_label/LabelBillsViewModel.kt

@@ -0,0 +1,101 @@
+package net.helcel.cowspent.android.bill_label
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBCategory
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+
+class LabelBillsViewModel : ViewModel() {
+    var billsToLabel by mutableStateOf<List<DBBill>>(emptyList())
+        internal set
+    var currentBillIndex by mutableIntStateOf(0)
+        private set
+    var categories by mutableStateOf<List<DBCategory>>(emptyList())
+        internal set
+    var suggestedCategories by mutableStateOf<List<DBCategory>>(emptyList())
+        private set
+
+    internal var categoriesMap: Map<Long, DBCategory> = emptyMap()
+    internal var allCategorizedBills: List<DBBill> = emptyList()
+    var onBillProcessed: ((Long) -> Unit)? = null
+    
+    val currentBill: DBBill?
+        get() = if (currentBillIndex < billsToLabel.size) billsToLabel[currentBillIndex] else null
+
+    fun updateSuggestions() {
+        val bill = currentBill
+        if (bill == null) {
+            suggestedCategories = emptyList()
+            return
+        }
+        val name = bill.what.lowercase().trim()
+        if (name.isEmpty()) {
+            suggestedCategories = emptyList()
+            return
+        }
+
+        val matches = allCategorizedBills.filter {
+            val otherName = it.what.lowercase().trim()
+            otherName == name || (name.length > 3 && otherName.contains(name)) || (otherName.length > 3 && name.contains(otherName))
+        }
+
+        val counts = matches.groupBy { it.categoryRemoteId }
+            .mapValues { it.value.size }
+            .toList()
+            .sortedByDescending { it.second }
+            .take(2)
+
+        suggestedCategories = counts.mapNotNull { (catId, _) ->
+            categoriesMap[catId.toLong()]
+        }
+    }
+
+    fun labelCurrentBill(db: CowspentSQLiteOpenHelper, categoryId: Int) {
+        currentBill?.let { bill ->
+            db.updateBillAndSync(
+                bill = bill,
+                newPayerId = bill.payerId,
+                newAmount = bill.amount,
+                newTimestamp = bill.timestamp,
+                newWhat = bill.what,
+                newOwersIds = bill.billOwersIds,
+                newRepeat = bill.repeat,
+                newPaymentMode = bill.paymentMode,
+                newPaymentModeRemoteId = bill.paymentModeRemoteId,
+                newCategoryId = categoryId,
+                newComment = bill.comment
+            )
+            bill.categoryRemoteId = categoryId
+            onBillProcessed?.invoke(bill.id)
+            moveToNext()
+        }
+    }
+
+    fun skipCurrentBill() {
+        currentBill?.let { bill ->
+            onBillProcessed?.invoke(bill.id)
+        }
+        moveToNext()
+    }
+
+    private fun moveToNext() {
+        if (billsToLabel.isEmpty()) return
+
+        val start = currentBillIndex
+        var next = (start + 1) % billsToLabel.size
+        while (next != start && billsToLabel[next].categoryRemoteId != 0) {
+            next = (next + 1) % billsToLabel.size
+        }
+
+        currentBillIndex = if (billsToLabel[next].categoryRemoteId == 0) {
+            next
+        } else {
+            billsToLabel.size
+        }
+        updateSuggestions()
+    }
+}

app/src/main/java/net/helcel/cowspent/android/currencies/ManageCurrenciesActivity.kt

@@ -0,0 +1,145 @@
+package net.helcel.cowspent.android.currencies
+
+import android.os.Bundle
+import android.util.Log
+import android.widget.Toast
+import androidx.activity.compose.setContent
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.showToast
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBCurrency
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.theme.ThemeUtils
+import net.helcel.cowspent.util.ICallback
+
+
+class ManageCurrenciesActivity : AppCompatActivity() {
+
+    private val viewModel: ManageCurrenciesViewModel by viewModels()
+    private var db: CowspentSQLiteOpenHelper? = null
+    private var selectedProjectID: Long = -1
+
+    private val editMainCurrencyCallBack: ICallback = object : ICallback {
+        override fun onFinish() {}
+        override fun onFinish(result: String, message: String) {
+            if (message.isEmpty()) {
+                showToast(this@ManageCurrenciesActivity,getString(R.string.currency_saved_success), Toast.LENGTH_LONG)
+            } else {
+                viewModel.showDialog(title=getString(R.string.error_edit_remote_project_helper, message),
+                    message=getString(R.string.currency_manager),
+                    positiveText = getString(android.R.string.ok))
+            }
+        }
+        override fun onScheduled() {}
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        intent.extras?.let {
+            selectedProjectID = it.getLong(EXTRA_PROJECT_ID)
+        }
+        if (selectedProjectID == -1L) {
+            Log.e(TAG, "Missing project id")
+            finish()
+            return
+        }
+
+        db = CowspentSQLiteOpenHelper.getInstance(this)
+        
+        lifecycleScope.launch {
+            val project = withContext(Dispatchers.IO) { db!!.getProject(selectedProjectID) }
+            viewModel.mainCurrencyName = project?.currencyName?.let { if (it == "null") "" else it } ?: ""
+            updateCurrenciesList()
+
+            setContent {
+                ThemeUtils.CowspentTheme {
+                    ManageCurrenciesScreen(
+                        viewModel = viewModel,
+                        onBack = { finish() },
+                        onSaveMain = { saveMainCurrency() },
+                        onAdd = { addCurrency() },
+                        onDelete = { deleteCurrency(it) }
+                    )
+                }
+            }
+        }
+    }
+
+    private fun saveMainCurrency() {
+        val newMainCurrencyName = viewModel.mainCurrencyName
+        lifecycleScope.launch {
+            withContext(Dispatchers.IO) {
+                db!!.updateProject(
+                    selectedProjectID, null, null, null,
+                    null, null, newMainCurrencyName,
+                    null, null, null
+                )
+                val project = db!!.getProject(selectedProjectID)
+                if (project != null) {
+                    db!!.syncIfRemote(project)
+                    withContext(Dispatchers.Main) {
+                        if (!db!!.cowspentServerSyncHelper
+                                .editRemoteProject(selectedProjectID, project.name, null, null, newMainCurrencyName, editMainCurrencyCallBack)
+                        ) {
+                            showToast(this@ManageCurrenciesActivity, getString(R.string.remote_project_operation_no_network), Toast.LENGTH_LONG)
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private fun addCurrency() {
+        val exchangeRate = try { viewModel.newCurrencyRate.toDouble() } catch (_: Exception) { 0.0 }
+        val newCurrency = DBCurrency(
+            0, 0, selectedProjectID,
+            viewModel.newCurrencyName, exchangeRate, DBBill.STATE_ADDED
+        )
+        lifecycleScope.launch {
+            withContext(Dispatchers.IO) {
+                db!!.addCurrencyAndSync(newCurrency)
+            }
+            viewModel.newCurrencyName = ""
+            viewModel.newCurrencyRate = ""
+            updateCurrenciesList()
+        }
+    }
+
+    private fun deleteCurrency(currency: DBCurrency) {
+        lifecycleScope.launch {
+            withContext(Dispatchers.IO) {
+                db!!.setCurrencyStateSync(currency.id, DBBill.STATE_DELETED)
+            }
+            updateCurrenciesList()
+        }
+    }
+
+    private suspend fun updateCurrenciesList() {
+        val currenciesDB = withContext(Dispatchers.IO) {
+            val list = db!!.getCurrenciesOfProjectWithState(selectedProjectID, DBBill.STATE_ADDED).toMutableList()
+            list.addAll(db!!.getCurrenciesOfProjectWithState(selectedProjectID, DBBill.STATE_EDITED))
+            list.addAll(db!!.getCurrenciesOfProjectWithState(selectedProjectID, DBBill.STATE_OK))
+            list
+        }
+        withContext(Dispatchers.Main) {
+            viewModel.currencies = currenciesDB
+        }
+    }
+
+    override fun onSupportNavigateUp(): Boolean {
+        finish()
+        return true
+    }
+
+    companion object {
+        private val TAG = ManageCurrenciesActivity::class.java.simpleName
+        const val EXTRA_PROJECT_ID = "EXTRA_PROJECT_ID"
+    }
+}

app/src/main/java/net/helcel/cowspent/android/currencies/ManageCurrenciesScreen.kt

@@ -0,0 +1,178 @@
+package net.helcel.cowspent.android.currencies
+
+import android.annotation.SuppressLint
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.AlertDialog
+import net.helcel.cowspent.model.DBCurrency
+
+@Composable
+fun ManageCurrenciesScreen(
+    viewModel: ManageCurrenciesViewModel,
+    onBack: () -> Unit,
+    onSaveMain: () -> Unit,
+    onAdd: () -> Unit,
+    onDelete: (DBCurrency) -> Unit
+) {
+    val dialogState = viewModel.dialogState
+    if (dialogState != null) {
+        AlertDialog(
+            showDialog = true,
+            onDismissRequest = { viewModel.dismissDialog() },
+            title = dialogState.title,
+            message = dialogState.message,
+            icon = dialogState.icon,
+            items = dialogState.items,
+            positiveText = dialogState.positiveText,
+            negativeText = dialogState.negativeText,
+            neutralText = dialogState.neutralText,
+            onConfirm = {
+                dialogState.onConfirm?.invoke()
+                viewModel.dismissDialog()
+            },
+            onCancel = {
+                dialogState.onCancel?.invoke()
+                viewModel.dismissDialog()
+            },
+            onNeutral = {
+                dialogState.onNeutral?.invoke()
+                viewModel.dismissDialog()
+            }
+        ) {
+            dialogState.onItemSelected?.invoke(it)
+            viewModel.dismissDialog()
+        }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.currency_manager)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.primary,
+                elevation = 0.dp
+            )
+        }
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .padding(padding)
+                .padding(16.dp)
+                .fillMaxSize()
+        ) {
+            Text(stringResource(R.string.main_currency), style = MaterialTheme.typography.h6)
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                OutlinedTextField(
+                    value = viewModel.mainCurrencyName,
+                    onValueChange = { viewModel.mainCurrencyName = it },
+                    label = { Text(stringResource(R.string.currency_edit_name)) },
+                    modifier = Modifier.weight(1f)
+                )
+                Spacer(modifier = Modifier.width(8.dp))
+                Button(onClick = onSaveMain, enabled = viewModel.mainCurrencyName.isNotEmpty()) {
+                    Text(stringResource(R.string.save_or_discard_bill_dialog_save))
+                }
+            }
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            Text(stringResource(R.string.add_currency_title), style = MaterialTheme.typography.h6)
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                OutlinedTextField(
+                    value = viewModel.newCurrencyName,
+                    onValueChange = { viewModel.newCurrencyName = it },
+                    label = { Text(stringResource(R.string.currency_edit_name)) },
+                    modifier = Modifier.weight(1f)
+                )
+                Spacer(modifier = Modifier.width(8.dp))
+                OutlinedTextField(
+                    value = viewModel.newCurrencyRate,
+                    onValueChange = { viewModel.newCurrencyRate = it },
+                    label = { Text(stringResource(R.string.currency_rate)) },
+                    modifier = Modifier.weight(1f)
+                )
+            }
+            Spacer(modifier = Modifier.height(8.dp))
+            Button(
+                onClick = onAdd,
+                modifier = Modifier.fillMaxWidth(),
+                enabled = viewModel.isAddEnabled()
+            ) {
+                Text(stringResource(R.string.simple_add))
+            }
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            LazyColumn(modifier = Modifier.weight(1f)) {
+                items(viewModel.currencies) { currency ->
+                    CurrencyRow(currency, onDelete = { onDelete(currency) })
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun CurrencyRow(currency: DBCurrency, onDelete: () -> Unit) {
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 8.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Column(modifier = Modifier.weight(1f)) {
+            Text(currency.name ?: "", style = MaterialTheme.typography.subtitle1)
+            Text("Rate: ${currency.exchangeRate}", style = MaterialTheme.typography.caption)
+        }
+        IconButton(onClick = onDelete) {
+            Icon(Icons.Default.Delete, contentDescription = null, tint = MaterialTheme.colors.error)
+        }
+    }
+    Divider()
+}
+
+@Preview(showBackground = true)
+@Composable
+fun CurrencyRowPreview() {
+    MaterialTheme {
+        CurrencyRow(
+            currency = DBCurrency(1, 0, 0, "USD", 1.0, 0),
+            onDelete = {}
+        )
+    }
+}
+
+@SuppressLint("ViewModelConstructorInComposable")
+@Preview(showBackground = true)
+@Composable
+fun ManageCurrenciesScreenPreview() {
+    MaterialTheme {
+        ManageCurrenciesScreen(
+            viewModel = ManageCurrenciesViewModel().apply {
+                mainCurrencyName = "EUR"
+                currencies = listOf(
+                    DBCurrency(1, 0, 0, "USD", 1.1, 0),
+                    DBCurrency(2, 0, 0, "GBP", 0.85, 0)
+                )
+            },
+            onBack = {},
+            onSaveMain = {},
+            onAdd = {},
+            onDelete = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/currencies/ManageCurrenciesViewModel.kt

@@ -0,0 +1,55 @@
+package net.helcel.cowspent.android.currencies
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.lifecycle.ViewModel
+import net.helcel.cowspent.android.helper.DialogState
+import net.helcel.cowspent.model.DBCurrency
+
+class ManageCurrenciesViewModel : ViewModel() {
+    var mainCurrencyName by mutableStateOf("")
+    var newCurrencyName by mutableStateOf("")
+    var newCurrencyRate by mutableStateOf("")
+
+    var currencies by mutableStateOf<List<DBCurrency>>(emptyList())
+
+    var dialogState by mutableStateOf<DialogState?>(null)
+
+    fun showDialog(
+        title: String? = null,
+        message: String? = null,
+        icon: ImageVector? = null,
+        items: List<CharSequence>? = null,
+        positiveText: String? = null,
+        negativeText: String? = null,
+        neutralText: String? = null,
+        onConfirm: (() -> Unit)? = null,
+        onCancel: (() -> Unit)? = null,
+        onNeutral: (() -> Unit)? = null,
+        onItemSelected: ((Int) -> Unit)? = null
+    ) {
+        dialogState = DialogState(
+            title = title,
+            message = message,
+            icon = icon,
+            items = items,
+            positiveText = positiveText,
+            negativeText = negativeText,
+            neutralText = neutralText,
+            onConfirm = onConfirm,
+            onCancel = onCancel,
+            onNeutral = onNeutral,
+            onItemSelected = onItemSelected
+        )
+    }
+
+    fun dismissDialog() {
+        dialogState = null
+    }
+
+    fun isAddEnabled(): Boolean {
+        return newCurrencyName.isNotEmpty() && newCurrencyRate.isNotEmpty()
+    }
+}

app/src/main/java/net/helcel/cowspent/android/drawer/Drawer.kt

@@ -0,0 +1,350 @@
+package net.helcel.cowspent.android.drawer
+
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.scale
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.UserAvatar
+import net.helcel.cowspent.android.helper.formatBalance
+import net.helcel.cowspent.android.helper.lazyVerticalScrollbar
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.model.DBProject
+import net.helcel.cowspent.model.ProjectType
+
+@Composable
+fun Drawer(
+    projects: List<DBProject>,
+    members: List<DBMember>,
+    memberBalances: Map<Long, Double> = emptyMap(),
+    selectedProjectId: Long,
+    selectedMemberId: Long?,
+    lastSyncText: String,
+    showArchived: Boolean = false,
+    onProjectClick: (Long) -> Unit,
+    onProjectOptionsClick: (Long) -> Unit,
+    onMemberClick: (Long?) -> Unit,
+    onAddProjectClick: () -> Unit,
+    onAppSettingsClick: () -> Unit
+) {
+    Column(
+        modifier = Modifier.fillMaxSize().background(MaterialTheme.colors.surface),
+    ) {
+        DrawerHeader(
+            lastSyncText = lastSyncText,
+            onAddProjectClick = onAddProjectClick,
+            onAppSettingsClick = onAppSettingsClick
+        )
+
+        BoxWithConstraints(modifier = Modifier.weight(1f)) {
+            val maxBottomHeight = maxHeight / 2
+
+            Column(modifier = Modifier.fillMaxSize()) {
+                // Projects Section
+                val activeProjects = projects.filter { !it.isArchived }
+                    .sortedWith(compareByDescending<DBProject> { it.latestBillTs }.thenByDescending { it.id })
+                val archivedProjects = projects.filter { it.isArchived }.sortedByDescending { it.archivedTs }
+                val archivedToDisplay = if (showArchived) archivedProjects else archivedProjects.filter { it.id == selectedProjectId }
+
+                val projectsState = rememberLazyListState()
+                LazyColumn(
+                    state = projectsState,
+                    modifier = Modifier.weight(1f).lazyVerticalScrollbar(projectsState)
+                ) {
+                    items(activeProjects) { project ->
+                        ProjectDrawerItem(
+                            project = project,
+                            isSelected = project.id == selectedProjectId,
+                            onClick = { onProjectClick(project.id) },
+                            onOptionsClick = { onProjectOptionsClick(project.id) }
+                        )
+                    }
+                    if (archivedToDisplay.isNotEmpty()) {
+                        item { Divider(Modifier.height(4.dp)) }
+                        items(archivedToDisplay) { project ->
+                            ProjectDrawerItem(
+                                project = project,
+                                isSelected = project.id == selectedProjectId,
+                                onClick = { onProjectClick(project.id) },
+                                onOptionsClick = { onProjectOptionsClick(project.id) },
+                                alpha = 0.6f,
+                                icon = Icons.Default.Archive
+                            )
+                        }
+                    }
+                }
+
+                Divider(Modifier.height(4.dp))
+
+                // Members Section
+                val membersState = rememberLazyListState()
+                LazyColumn(
+                    state = membersState,
+                    modifier = Modifier
+                        .heightIn(max = maxBottomHeight)
+                        .lazyVerticalScrollbar(membersState)
+                ) {
+                    if (members.isNotEmpty()) {
+                        item {
+                            DrawerItem(
+                                icon = Icons.Default.Receipt,
+                                text = stringResource(R.string.label_all_bills),
+                                selected = selectedMemberId == null,
+                                onClick = { onMemberClick(null) }
+                            )
+                        }
+                        items(members) { member ->
+                            val balance = memberBalances[member.id] ?: 0.0
+                            MemberDrawerItem(
+                                member = member,
+                                balance = balance,
+                                isSelected = member.id == selectedMemberId,
+                                onClick = { onMemberClick(member.id) }
+                            )
+                        }
+                    }
+                }
+            }
+        }
+        Spacer(Modifier.height(8.dp))
+    }
+}
+
+@Composable
+private fun DrawerHeader(
+    lastSyncText: String,
+    onAddProjectClick: () -> Unit,
+    onAppSettingsClick: () -> Unit
+) {
+    Box(
+        modifier = Modifier
+            .fillMaxWidth()
+            .background(MaterialTheme.colors.primary)
+            .padding(16.dp, 4.dp)
+    ) {
+        Column {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Image(
+                    painter = painterResource(id = R.drawable.ic_launcher_foreground),
+                    contentDescription = null,
+                    modifier = Modifier.size(48.dp)
+                )
+                Spacer(modifier = Modifier.width(8.dp))
+                Text(
+                    stringResource(id = R.string.app_name),
+                    color = MaterialTheme.colors.onPrimary,
+                    fontSize = 18.sp,
+                    fontWeight = FontWeight.Bold
+                )
+                Spacer(modifier = Modifier.weight(1f))
+                IconButton(
+                    onClick = onAddProjectClick,
+                    modifier = Modifier.scale(0.8f)
+                ) {
+                    Icon(
+                        Icons.Default.Add,
+                        contentDescription = stringResource(id = R.string.action_add_project),
+                        tint = MaterialTheme.colors.onPrimary
+                    )
+                }
+                IconButton(
+                    onClick = onAppSettingsClick,
+                    modifier = Modifier.scale(0.8f)
+                ) {
+                    Icon(
+                        Icons.Default.Settings,
+                        contentDescription = stringResource(id = R.string.action_settings),
+                        tint = MaterialTheme.colors.onPrimary
+                    )
+                }
+            }
+            if (lastSyncText.isNotEmpty()) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Icon(
+                        Icons.Default.Sync,
+                        contentDescription = null,
+                        modifier = Modifier.size(12.dp),
+                        tint = MaterialTheme.colors.onPrimary
+                    )
+                    Spacer(modifier = Modifier.width(8.dp))
+                    Text(lastSyncText, color = MaterialTheme.colors.onPrimary, fontSize = 12.sp)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun ProjectDrawerItem(
+    project: DBProject,
+    isSelected: Boolean,
+    onClick: () -> Unit,
+    onOptionsClick: () -> Unit,
+    alpha: Float = 1f,
+    icon: ImageVector = Icons.Default.Folder
+) {
+    val projectName = project.name.ifEmpty { project.remoteId }
+    DrawerItem(
+        icon = icon,
+        text = projectName,
+        selected = isSelected,
+        onClick = onClick,
+        onSecondaryClick = onOptionsClick,
+        alpha = alpha
+    )
+}
+
+@Composable
+private fun MemberDrawerItem(
+    member: DBMember,
+    balance: Double,
+    isSelected: Boolean,
+    onClick: () -> Unit
+) {
+    val balanceText = formatBalance(balance)
+    val balanceColor = when {
+        balance > 0.01 -> Color(0xFF4CAF50)
+        balance < -0.01 -> Color(0xFFF44336)
+        else -> MaterialTheme.colors.onSurface.copy(alpha = 0.6f)
+    }
+
+    DrawerItem(
+        member = member,
+        balanceText = balanceText.ifEmpty { null },
+        balanceColor = balanceColor,
+        selected = isSelected,
+        onClick = onClick
+    )
+}
+
+@Composable
+fun DrawerItem(
+    icon: ImageVector? = null,
+    member: DBMember? = null,
+    text: String? = null,
+    balanceText: String? = null,
+    balanceColor: Color = Color.Unspecified,
+    selected: Boolean = false,
+    alpha: Float = 1f,
+    onClick: () -> Unit,
+    onSecondaryClick: (() -> Unit)? = null
+) {
+    val backgroundColor = if (selected) MaterialTheme.colors.primary.copy(alpha = 0.12f) else Color.Transparent
+    val contentColor = (if (selected) MaterialTheme.colors.primary else MaterialTheme.colors.onSurface).copy(alpha = alpha)
+
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .background(backgroundColor)
+            .clickable(onClick = onClick)
+            .padding(horizontal = 16.dp, vertical = if (member != null) 0.dp else 8.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        if (member != null) {
+            UserAvatar(
+                name = member.name,
+                r = member.r,
+                g = member.g,
+                b = member.b,
+                avatar = member.avatar,
+                disabled = !member.isActivated,
+                size = 24.dp,
+                alpha = alpha
+            )
+        } else if (icon != null) {
+            Icon(icon, contentDescription = null, tint = contentColor.copy(alpha = 0.6f * alpha))
+        }
+        
+        Spacer(modifier = Modifier.width(8.dp))
+        
+        val itemText = text ?: member?.name ?: ""
+        Text(
+            text = itemText,
+            modifier = Modifier.weight(1f),
+            color = contentColor,
+            fontWeight = if (selected) FontWeight.Bold else FontWeight.Normal,
+            maxLines = 1,
+            overflow = androidx.compose.ui.text.style.TextOverflow.Ellipsis
+        )
+        
+        if (balanceText != null) {
+            Text(
+                text = balanceText,
+                color = balanceColor,
+                fontSize = 12.sp,
+                fontWeight = FontWeight.Bold,
+                modifier = Modifier.padding(end = 8.dp)
+            )
+        }
+        
+        if (onSecondaryClick != null) {
+            IconButton(onClick = onSecondaryClick) {
+                Icon(
+                    Icons.Default.MoreVert,
+                    contentDescription = null,
+                    tint = contentColor.copy(alpha = 0.6f)
+                )
+            }
+        } else if (member != null) {
+            // Equalize height with project items that have a secondary button
+            Spacer(modifier = Modifier.height(48.dp))
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun DrawerItemPreview() {
+    MaterialTheme {
+        DrawerItem(
+            icon = Icons.Default.Folder,
+            text = "My Project",
+            selected = true,
+            onClick = {},
+            onSecondaryClick = {}
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun DrawerPreview() {
+    MaterialTheme {
+        Drawer(
+            projects = listOf(
+                DBProject(1, "Vacation", "", "vacation", null, null, null, ProjectType.LOCAL, 0L, null, false, 0, null, null),
+                DBProject(2, "Home", "", "home", null, null, null, ProjectType.LOCAL, 0L, null, false, 0, null, 123456789L)
+            ),
+            members = listOf(
+                DBMember(1, 0, 1, "Alice", true, 1.0, 0, null, null, null, null, null),
+                DBMember(2, 0, 1, "Bob", true, 1.0, 0, null, null, null, null, null)
+            ),
+            selectedProjectId = 1,
+            selectedMemberId = null,
+            lastSyncText = "Last sync: 5 mins ago",
+            onProjectClick = {},
+            onProjectOptionsClick = {},
+            onMemberClick = {},
+            onAddProjectClick = {},
+            onAppSettingsClick = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/helper/AlertDialog.kt

@@ -0,0 +1,312 @@
+package net.helcel.cowspent.android.helper
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+
+data class DialogState(
+    val title: String? = null,
+    val message: String? = null,
+    val icon: ImageVector? = null,
+    val items: List<CharSequence>? = null,
+    val itemIcons: List<ImageVector>? = null,
+    val positiveText: String? = null,
+    val negativeText: String? = null,
+    val neutralText: String? = null,
+    val onConfirm: (() -> Unit)? = null,
+    val onCancel: (() -> Unit)? = null,
+    val onNeutral: (() -> Unit)? = null,
+    val onItemSelected: ((Int) -> Unit)? = null
+)
+
+@Composable
+fun StatefulAlertDialog(
+    state: DialogState?,
+    onDismissRequest: () -> Unit
+) {
+    if (state != null) {
+        AlertDialog(
+            showDialog = true,
+            onDismissRequest = onDismissRequest,
+            title = state.title,
+            message = state.message,
+            icon = state.icon,
+            items = state.items,
+            itemIcons = state.itemIcons,
+            positiveText = state.positiveText,
+            negativeText = state.negativeText,
+            neutralText = state.neutralText,
+            onConfirm = {
+                state.onConfirm?.invoke()
+                onDismissRequest()
+            },
+            onCancel = {
+                state.onCancel?.invoke()
+                onDismissRequest()
+            },
+            onNeutral = {
+                state.onNeutral?.invoke()
+                onDismissRequest()
+            }
+        ) {
+            state.onItemSelected?.invoke(it)
+            onDismissRequest()
+        }
+    }
+}
+
+@Composable
+fun AlertDialog(
+    modifier: Modifier = Modifier,
+    showDialog: Boolean,
+    onDismissRequest: () -> Unit,
+    title: String? = null,
+    message: String? = null,
+    icon: ImageVector? = null,
+    items: List<CharSequence>? = null,
+    itemIcons: List<ImageVector>? = null,
+    positiveText: String? = null,
+    negativeText: String? = null,
+    neutralText: String? = null,
+    onConfirm: (() -> Unit)? = null,
+    onCancel: (() -> Unit)? = null,
+    onNeutral: (() -> Unit)? = null,
+    onItemSelected: ((Int) -> Unit)? = null
+) {
+    if (showDialog) {
+        AlertDialog(
+            onDismissRequest = onDismissRequest,
+            shape = MaterialTheme.shapes.large,
+            title = if (title != null || icon != null) {
+                {
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        if (icon != null) {
+                            Icon(icon, contentDescription = null)
+                            Spacer(Modifier.width(8.dp))
+                        }
+                        if (title != null) {
+                            Text(text = title)
+                        }
+                    }
+                }
+            } else null,
+            text = if (message != null || items != null) {
+                {
+                    Column {
+                        if (message != null) {
+                            Text(text = message)
+                        }
+                        if (items != null) {
+                            if (message != null) Spacer(Modifier.height(8.dp))
+                            LazyColumn {
+                                itemsIndexed(items) { index, item ->
+                                    Row(
+                                        modifier = Modifier
+                                            .fillMaxWidth()
+                                            .clickable { 
+                                                onItemSelected?.invoke(index)
+                                            }
+                                            .padding(vertical = 12.dp),
+                                        verticalAlignment = Alignment.CenterVertically
+                                    ) {
+                                        if (itemIcons != null && index < itemIcons.size) {
+                                            Icon(
+                                                itemIcons[index], 
+                                                contentDescription = null,
+                                                modifier = Modifier.size(24.dp),
+                                                tint = MaterialTheme.colors.primary.copy(alpha = 0.7f)
+                                            )
+                                            Spacer(Modifier.width(16.dp))
+                                        }
+                                        Text(
+                                            text = item.toString(),
+                                            style = MaterialTheme.typography.body1
+                                        )
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            } else null,
+            buttons = {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(all = 8.dp),
+                    horizontalArrangement = Arrangement.End
+                ) {
+                    if (neutralText != null) {
+                        TextButton(onClick = { onNeutral?.invoke() }) {
+                            Text(neutralText)
+                        }
+                        Spacer(modifier = Modifier.weight(1f))
+                    }
+                    if (negativeText != null) {
+                        TextButton(onClick = { onCancel?.invoke() }) {
+                            Text(negativeText)
+                        }
+                    }
+                    if (positiveText != null) {
+                        TextButton(onClick = { onConfirm?.invoke() }) {
+                            Text(positiveText)
+                        }
+                    }
+                }
+            },
+            modifier = modifier
+        )
+    }
+}
+
+@Composable
+fun AlertDialogContent(
+    modifier: Modifier = Modifier,
+    title: String? = null,
+    message: String? = null,
+    icon: ImageVector? = null,
+    items: Array<out CharSequence>? = null,
+    itemIcons: Array<out ImageVector>? = null,
+    positiveText: String? = null,
+    negativeText: String? = null,
+    neutralText: String? = null,
+    onConfirm: (() -> Unit)? = null,
+    onCancel: (() -> Unit)? = null,
+    onNeutral: (() -> Unit)? = null,
+    onItemSelected: ((Int) -> Unit)? = null
+) {
+    Surface(
+        shape = MaterialTheme.shapes.large,
+        color = MaterialTheme.colors.surface,
+        contentColor = contentColorFor(MaterialTheme.colors.surface),
+        modifier = modifier
+    ) {
+        Column(modifier = Modifier.padding(24.dp,16.dp)) {
+            if (title != null || icon != null) {
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    modifier = Modifier.padding(bottom = 16.dp)
+                ) {
+                    if (icon != null) {
+                        Icon(icon, contentDescription = null)
+                        Spacer(Modifier.width(8.dp))
+                    }
+                    if (title != null) {
+                        Text(text = title, style = MaterialTheme.typography.h6)
+                    }
+                }
+            }
+
+            if (message != null || items != null) {
+                Column {
+                    if (message != null) {
+                        Text(text = message, style = MaterialTheme.typography.body1)
+                    }
+                    if (items != null) {
+                        if (message != null) Spacer(Modifier.height(8.dp))
+                        LazyColumn {
+                            itemsIndexed(items) { index, item ->
+                                Row(
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .clickable {
+                                            onItemSelected?.invoke(index)
+                                        }
+                                        .padding(vertical = 8.dp),
+                                    verticalAlignment = Alignment.CenterVertically
+                                ) {
+                                    if (itemIcons != null && index < itemIcons.size) {
+                                        Icon(
+                                            itemIcons[index],
+                                            contentDescription = null,
+                                            modifier = Modifier.size(24.dp),
+                                            tint = MaterialTheme.colors.primary.copy(alpha = 0.7f)
+                                        )
+                                        Spacer(Modifier.width(16.dp))
+                                    }
+                                    Text(
+                                        text = item.toString(),
+                                        style = MaterialTheme.typography.body1
+                                    )
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (positiveText != null || negativeText != null || neutralText != null) {
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.End
+                ) {
+                    if (neutralText != null) {
+                        TextButton(onClick = { onNeutral?.invoke() }) {
+                            Text(neutralText)
+                        }
+                        Spacer(modifier = Modifier.weight(1f))
+                    }
+                    if (negativeText != null) {
+                        TextButton(onClick = { onCancel?.invoke() }) {
+                            Text(negativeText)
+                        }
+                    }
+                    if (positiveText != null) {
+                        TextButton(onClick = { onConfirm?.invoke() }) {
+                            Text(positiveText)
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun SimpleAlertDialogPreview() {
+    MaterialTheme {
+        AlertDialogContent(
+            title = "Info",
+            message = "This is a simple alert message.",
+            positiveText = "OK"
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun ConfirmationDialogPreview() {
+    MaterialTheme {
+        AlertDialogContent(
+            title = "Confirm Action",
+            message = "Are you sure you want to proceed?",
+            icon = Icons.Default.Info,
+            positiveText = "Yes",
+            negativeText = "No"
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun ListDialogWithIconsPreview() {
+    MaterialTheme {
+        AlertDialogContent(
+            title = "Select Option",
+            items = arrayOf("Edit", "Delete", "Share"),
+            itemIcons = arrayOf(Icons.Default.Edit, Icons.Default.Delete, Icons.Default.Share),
+            negativeText = "Cancel"
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/helper/ColorPicker.kt

@@ -0,0 +1,298 @@
+package net.helcel.cowspent.android.helper
+
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+import androidx.compose.foundation.gestures.detectDragGestures
+import androidx.compose.foundation.gestures.detectTapGestures
+import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.text.BasicTextField
+import androidx.compose.material.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.draw.shadow
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.text.AnnotatedString
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.OffsetMapping
+import androidx.compose.ui.text.input.TransformedText
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import androidx.core.graphics.ColorUtils
+import kotlin.math.*
+import androidx.core.graphics.toColorInt
+
+
+private fun mLCHtoRBG(l: Float, c: Float, h: Float) : Int{
+    val hRad = h * PI / 180
+    val a = c * cos(hRad)
+    val b = c * sin(hRad)
+    return ColorUtils.LABToColor(l.toDouble(), a, b)
+}
+
+
+@Composable
+fun ColorPicker(
+    initialColor: Int,
+    onColorChanged: (Int) -> Unit
+) {
+    // LCH state
+    val initialLch = remember(initialColor) {
+        val lab = DoubleArray(3)
+        ColorUtils.colorToLAB(initialColor, lab)
+        val l = lab[0].toFloat()
+        val c = sqrt(lab[1].pow(2) + lab[2].pow(2)).toFloat()
+        val h = (atan2(lab[2], lab[1]) * 180 / PI).toFloat().let { if (it < 0) it + 360f else it }
+        floatArrayOf(l, c, h)
+    }
+
+    var lightness by remember { mutableFloatStateOf(initialLch[0]) }
+    var chroma by remember { mutableFloatStateOf(initialLch[1]) }
+    var hue by remember { mutableFloatStateOf(initialLch[2]) }
+
+    val currentColorInt = remember(lightness, chroma, hue) {
+        val color = mLCHtoRBG(lightness,chroma,hue)
+        onColorChanged(color)
+        color
+    }
+    
+    val currentColor = Color(currentColorInt)
+
+    // HEX state
+    var hexText by remember { mutableStateOf("%06X".format(0xFFFFFF and currentColorInt)) }
+    var isHexValid by remember { mutableStateOf(true) }
+    val interactionSource = remember { MutableInteractionSource() }
+
+    // Sync HEX with LCH
+    LaunchedEffect(currentColorInt) {
+        val newHex = "%06X".format(0xFFFFFF and currentColorInt)
+        if (hexText.uppercase() != newHex) {
+            hexText = newHex
+            isHexValid = true
+        }
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(8.dp),
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        // Preview Area
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(bottom = 16.dp),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.Center
+        ) {
+            Box(
+                modifier = Modifier
+                    .size(64.dp)
+                    .shadow(4.dp, CircleShape)
+                    .clip(CircleShape)
+                    .background(currentColor)
+                    .border(2.dp, Color.White, CircleShape)
+            )
+            Spacer(modifier = Modifier.width(12.dp))
+            Column {
+                Text(
+                    text = "Selected Color",
+                    style = MaterialTheme.typography.caption,
+                    color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f)
+                )
+
+                BasicTextField(
+                    value = hexText,
+                    onValueChange = { newText ->
+                        val filtered = newText.removePrefix("#").filter { it.isDigit() || it.uppercaseChar() in 'A'..'F' }.take(6)
+                        hexText = filtered
+                        if (filtered.length == 6) {
+                            try {
+                                val parsedColor = "#$filtered".toColorInt()
+                                val lab = DoubleArray(3)
+                                ColorUtils.colorToLAB(parsedColor, lab)
+                                lightness = lab[0].toFloat()
+                                chroma = sqrt(lab[1].pow(2) + lab[2].pow(2)).toFloat()
+                                hue = (atan2(lab[2], lab[1]) * 180 / PI).toFloat().let { if (it < 0) it + 360f else it }
+                                isHexValid = true
+                            } catch (_: Exception) {
+                                isHexValid = false
+                            }
+                        } else {
+                            isHexValid = false
+                        }
+                    },
+                    modifier = Modifier
+                        .width(104.dp)
+                        .heightIn(min = 36.dp), // 1. Bypasses the default 56.dp constraint
+                    textStyle = MaterialTheme.typography.body1.copy(
+                        fontWeight = FontWeight.Bold,
+                        fontFamily = FontFamily.Monospace,
+                        color = MaterialTheme.colors.onSurface // Essential for BasicTextField visibility
+                    ),
+                    visualTransformation = { text ->
+                        TransformedText(
+                            AnnotatedString("#" + text.text),
+                            object : OffsetMapping {
+                                override fun originalToTransformed(offset: Int): Int = offset + 1
+                                override fun transformedToOriginal(offset: Int): Int = if (offset < 1) 0 else offset - 1
+                            }
+                        )
+                    },
+                    singleLine = true,
+                    interactionSource = interactionSource
+                ) { innerTextField ->
+                    @OptIn(ExperimentalMaterialApi::class)
+                    TextFieldDefaults.TextFieldDecorationBox(
+                        value = hexText,
+                        innerTextField = innerTextField,
+                        enabled = true,
+                        singleLine = true,
+                        visualTransformation = { text ->
+                            TransformedText(
+                                AnnotatedString("#" + text.text),
+                                object : OffsetMapping {
+                                    override fun originalToTransformed(offset: Int): Int =
+                                        offset + 1
+
+                                    override fun transformedToOriginal(offset: Int): Int =
+                                        if (offset < 1) 0 else offset - 1
+                                }
+                            )
+                        },
+                        interactionSource = interactionSource,
+                        isError = !isHexValid, // 2. Tells decoration box to draw the red error indicator line
+                        colors = TextFieldDefaults.textFieldColors(
+                            backgroundColor = Color.Transparent,
+                            focusedIndicatorColor = currentColor,
+                            unfocusedIndicatorColor = MaterialTheme.colors.onSurface.copy(alpha = 0.3f)
+                        ),
+                        // 3. Reduces the vertical and horizontal internal padding
+                        contentPadding = PaddingValues(horizontal = 6.dp, vertical = 4.dp)
+                    )
+                }
+            }
+        }
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        val hueBrush = remember {
+            Brush.horizontalGradient(
+                listOf(
+                    Color.Red, Color.Yellow, Color.Green, Color.Cyan, Color.Blue, Color.Magenta, Color.Red
+                )
+            )
+        }
+        LchSlider(
+            label = "H",
+            value = hue,
+            range = 0f..360f,
+            onValueChange = { hue = it },
+            brush = hueBrush
+        )
+        
+        Spacer(modifier = Modifier.height(16.dp))
+
+        LchSlider(
+            label = "C",
+            value = chroma,
+            range = 0f..150f,
+            onValueChange = { chroma = it },
+            brush = Brush.horizontalGradient(listOf(
+                Color(mLCHtoRBG(lightness,0f, hue)),
+                Color(mLCHtoRBG(lightness,150f,hue))))
+        )
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        // LCH Sliders
+        LchSlider(
+            label = "L",
+            value = lightness,
+            range = 0f..100f,
+            onValueChange = { lightness = it },
+            brush = Brush.horizontalGradient(listOf(Color.Black, Color.White))
+        )
+    }
+}
+
+@Composable
+fun LchSlider(
+    label: String,
+    value: Float,
+    range: ClosedFloatingPointRange<Float>,
+    onValueChange: (Float) -> Unit,
+    brush: Brush
+) {
+    Row(
+        modifier = Modifier.fillMaxWidth(),
+        horizontalArrangement = Arrangement.SpaceBetween
+    ) {
+        Text(text = label, style = MaterialTheme.typography.subtitle2)
+        Spacer(Modifier.width(Dp(8f)))
+        Box(
+            modifier = Modifier
+                .fillMaxWidth()
+                .height(28.dp)
+                .shadow(2.dp, RoundedCornerShape(14.dp))
+                .clip(RoundedCornerShape(14.dp))
+                .background(brush)
+                .pointerInput(Unit) {
+                    detectTapGestures { offset ->
+                        val newValue = (offset.x / size.width).coerceIn(
+                            0f,
+                            1f
+                        ) * (range.endInclusive - range.start) + range.start
+                        onValueChange(newValue)
+                    }
+                }
+                .pointerInput(Unit) {
+                    detectDragGestures { change, _ ->
+                        val newValue = (change.position.x / size.width).coerceIn(
+                            0f,
+                            1f
+                        ) * (range.endInclusive - range.start) + range.start
+                        onValueChange(newValue)
+                    }
+                }
+        ) {
+            // Handle
+            Canvas(modifier = Modifier.fillMaxSize()) {
+                val fraction = (value - range.start) / (range.endInclusive - range.start)
+                val x = fraction * size.width
+                drawCircle(
+                    color = Color.White,
+                    radius = 12.dp.toPx(),
+                    center = Offset(x, size.height / 2),
+                    style = Stroke(width = 3.dp.toPx())
+                )
+                drawCircle(
+                    color = Color.Black.copy(alpha = 0.2f),
+                    radius = 13.dp.toPx(),
+                    center = Offset(x, size.height / 2),
+                    style = Stroke(width = 1.dp.toPx())
+                )
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun ColorPickerPreview() {
+    MaterialTheme {
+        ColorPicker(initialColor = android.graphics.Color.BLUE, onColorChanged = {})
+    }
+}

app/src/main/java/net/helcel/cowspent/android/helper/CommonComposables.kt

@@ -0,0 +1,85 @@
+package net.helcel.cowspent.android.helper
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun ClickableOutlinedTextField(
+    value: String,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier,
+    enabled: Boolean = true,
+    leadingIcon: @Composable (() -> Unit)? = null,
+    trailingIcon: @Composable (() -> Unit)? = null,
+    placeholder: @Composable (() -> Unit)? = null
+) {
+    Box(modifier = modifier) {
+        OutlinedTextField(
+            value = value,
+            onValueChange = {},
+            readOnly = true,
+            enabled = enabled,
+            placeholder = placeholder,
+            modifier = Modifier.fillMaxWidth(),
+            leadingIcon = leadingIcon,
+            trailingIcon = trailingIcon
+        )
+        Box(
+            modifier = Modifier
+                .matchParentSize()
+                .clickable(enabled = enabled) { onClick() })
+    }
+}
+
+@OptIn(ExperimentalMaterialApi::class)
+@Composable
+fun EditableExposedDropdownMenu(
+    value: String,
+    placeholder: String,
+    expanded: Boolean,
+    onExpandedChange: (Boolean) -> Unit,
+    onDismissRequest: () -> Unit,
+    modifier: Modifier = Modifier,
+    enabled: Boolean = true,
+    leadingIcon: @Composable (() -> Unit)? = null,
+    colors: TextFieldColors = ExposedDropdownMenuDefaults.outlinedTextFieldColors(),
+    content: @Composable ColumnScope.() -> Unit
+) {
+    ExposedDropdownMenuBox(
+        expanded = expanded && enabled,
+        onExpandedChange = { if (enabled) onExpandedChange(!expanded) },
+        modifier = modifier.fillMaxWidth()
+    ) {
+        OutlinedTextField(
+            value = value,
+            onValueChange = {},
+            readOnly = true,
+            enabled = enabled,
+            placeholder = { Text(placeholder) },
+            modifier = Modifier.fillMaxWidth(),
+            leadingIcon = leadingIcon,
+            trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded = expanded) },
+            colors = colors
+        )
+        ExposedDropdownMenu(
+            expanded = expanded,
+            onDismissRequest = onDismissRequest
+        ) {
+            val scrollState = rememberScrollState()
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .heightIn(max = 280.dp)
+                    .verticalScrollbar(scrollState)
+                    .verticalScroll(scrollState),
+                content = content
+            )
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/helper/FormatUtils.kt

@@ -0,0 +1,20 @@
+package net.helcel.cowspent.android.helper
+
+import net.helcel.cowspent.util.SupportUtil
+import java.util.Locale
+import kotlin.math.abs
+import kotlin.math.round
+
+fun formatShortValue(value: Double): String {
+    return when {
+        value >= 1_000_000 -> String.format(Locale.ROOT, "%.1fM", value / 1_000_000).replace(".0", "")
+        value >= 1_000 -> String.format(Locale.ROOT, "%.1fk", value / 1_000).replace(".0", "")
+        else -> String.format(Locale.ROOT, "%.0f", value)
+    }
+}
+
+fun formatBalance(balance: Double): String {
+    val rbalance = round(abs(balance) * 100.0) / 100.0
+    val balanceSign = if (balance > 0.01) "+" else if (balance < -0.01) "-" else ""
+    return if (rbalance == 0.0) "" else "$balanceSign${SupportUtil.normalNumberFormat.format(rbalance)}"
+}

app/src/main/java/net/helcel/cowspent/android/helper/ModifierUtils.kt

@@ -0,0 +1,70 @@
+package net.helcel.cowspent.android.helper
+
+import androidx.compose.foundation.ScrollState
+import androidx.compose.foundation.lazy.LazyListState
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawWithContent
+import androidx.compose.ui.geometry.CornerRadius
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+
+fun Modifier.verticalScrollbar(
+    state: ScrollState,
+    width: Dp = 4.dp,
+    color: Color = Color.Gray,
+    alpha: Float = 0.6f
+): Modifier = drawWithContent {
+    drawContent()
+    val maxValue = state.maxValue.toFloat()
+    if (maxValue > 0) {
+        val viewPortHeight = size.height
+        val totalContentHeight = maxValue + viewPortHeight
+        val scrollBarHeight = (viewPortHeight * viewPortHeight / totalContentHeight).coerceAtLeast(24.dp.toPx())
+        val scrollBarOffset = (state.value.toFloat() / maxValue) * (viewPortHeight - scrollBarHeight)
+
+        drawRoundRect(
+            color = color,
+            topLeft = Offset(size.width - width.toPx() - 2.dp.toPx(), scrollBarOffset),
+            size = Size(width.toPx(), scrollBarHeight),
+            cornerRadius = CornerRadius(width.toPx() / 2, width.toPx() / 2),
+            alpha = alpha
+        )
+    }
+}
+
+fun Modifier.lazyVerticalScrollbar(
+    state: LazyListState,
+    width: Dp = 4.dp,
+    color: Color = Color.Gray,
+    alpha: Float = 0.6f
+): Modifier = drawWithContent {
+    drawContent()
+    val layoutInfo = state.layoutInfo
+    val visibleItemsInfo = layoutInfo.visibleItemsInfo
+    if (visibleItemsInfo.isNotEmpty()) {
+        val totalItemsCount = layoutInfo.totalItemsCount
+        val firstVisibleItem = visibleItemsInfo.first()
+
+        val viewPortHeight = layoutInfo.viewportEndOffset - layoutInfo.viewportStartOffset
+        val avgItemHeight = visibleItemsInfo.map { it.size }.average().toFloat()
+        val totalContentHeight = avgItemHeight * totalItemsCount
+
+        if (totalContentHeight > viewPortHeight) {
+            val scrollBarHeight = (viewPortHeight.toFloat() * viewPortHeight / totalContentHeight).coerceAtLeast(24.dp.toPx())
+            val firstItemOffset = firstVisibleItem.offset
+            val scrollOffset = firstVisibleItem.index * avgItemHeight - firstItemOffset
+            val scrollBarOffset = (scrollOffset / (totalContentHeight - viewPortHeight)) * (viewPortHeight - scrollBarHeight)
+
+            drawRoundRect(
+                color = color,
+                topLeft = Offset(size.width - width.toPx() - 2.dp.toPx(), scrollBarOffset),
+                size = Size(width.toPx(), scrollBarHeight),
+                cornerRadius = CornerRadius(width.toPx() / 2, width.toPx() / 2),
+                alpha = alpha
+            )
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/helper/QrCodeScannerActivity.kt

@@ -0,0 +1,226 @@
+package net.helcel.cowspent.android.helper
+
+import android.Manifest
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Bundle
+import android.os.VibrationEffect
+import android.os.Vibrator
+import android.util.Log
+import androidx.activity.compose.setContent
+import androidx.annotation.OptIn
+import androidx.appcompat.app.AppCompatActivity
+import net.helcel.cowspent.theme.ThemeUtils
+import androidx.camera.core.*
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.camera.view.PreviewView
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.runtime.*
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.lifecycle.compose.LocalLifecycleOwner
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.viewinterop.AndroidView
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+import com.google.zxing.*
+import com.google.zxing.common.HybridBinarizer
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.main.MainConstants
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
+
+class QrCodeScannerActivity : AppCompatActivity() {
+    private lateinit var cameraExecutor: ExecutorService
+    private var isScanning = true
+
+    override fun onCreate(state: Bundle?) {
+        super.onCreate(state)
+        
+        cameraExecutor = Executors.newSingleThreadExecutor()
+
+        setContent {
+            ThemeUtils.CowspentTheme {
+                QrCodeScannerScreen(
+                    onBack = { finish() },
+                    onResult = { handleResult(it) },
+                    cameraExecutor = cameraExecutor,
+                    isScanning = isScanning,
+                    onRequestPermission = {
+                        ActivityCompat.requestPermissions(
+                            this, REQUIRED_PERMISSIONS, REQUEST_CODE_PERMISSIONS
+                        )
+                    },
+                    hasPermission = allPermissionsGranted()
+                )
+            }
+        }
+    }
+
+    private fun allPermissionsGranted() = REQUIRED_PERMISSIONS.all {
+        ContextCompat.checkSelfPermission(baseContext, it) == PackageManager.PERMISSION_GRANTED
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        cameraExecutor.shutdown()
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int, permissions: Array<String>, grantResults: IntArray
+    ) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+        if (requestCode == REQUEST_CODE_PERMISSIONS) {
+            if (allPermissionsGranted()) {
+                // Permissions granted, the UI will recompose and start camera
+            } else {
+                finish()
+            }
+        }
+    }
+
+    private fun handleResult(result: Result) {
+        if (!isScanning) return
+        isScanning = false
+        
+        Log.v(TAG, "QR result " + result.text)
+
+        val intent = Intent()
+        intent.putExtra(MainConstants.KEY_QR_CODE, result.text)
+        setResult(RESULT_OK, intent)
+        finish()
+    }
+
+    companion object {
+        private val TAG = QrCodeScannerActivity::class.java.simpleName
+        private const val REQUEST_CODE_PERMISSIONS = 10
+        private val REQUIRED_PERMISSIONS = arrayOf(Manifest.permission.CAMERA)
+    }
+}
+
+@Composable
+fun QrCodeScannerScreen(
+    onBack: () -> Unit,
+    onResult: (Result) -> Unit,
+    cameraExecutor: ExecutorService,
+    isScanning: Boolean,
+    onRequestPermission: () -> Unit,
+    hasPermission: Boolean
+) {
+    val context = LocalContext.current
+    val lifecycleOwner = LocalLifecycleOwner.current
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.scan_qrcode)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.surface,
+                elevation = 0.dp
+            )
+        }
+    ) { padding ->
+        Box(modifier = Modifier.fillMaxSize().padding(padding)) {
+            if (hasPermission) {
+                AndroidView(
+                    factory = { ctx ->
+                        PreviewView(ctx).apply {
+                            scaleType = PreviewView.ScaleType.FILL_CENTER
+                        }
+                    },
+                    modifier = Modifier.fillMaxSize(),
+                    update = { previewView ->
+                        val cameraProviderFuture = ProcessCameraProvider.getInstance(context)
+                        cameraProviderFuture.addListener({
+                            val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
+                            val preview = androidx.camera.core.Preview.Builder().build().also {
+                                it.surfaceProvider = previewView.surfaceProvider
+                            }
+
+                            val imageAnalyzer = ImageAnalysis.Builder()
+                                .setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
+                                .build()
+                                .also {
+                                    it.setAnalyzer(cameraExecutor, QrCodeAnalyzer { result ->
+                                        if (isScanning) {
+                                            onResult(result)
+                                        }
+                                    })
+                                }
+
+                            try {
+                                cameraProvider.unbindAll()
+                                cameraProvider.bindToLifecycle(
+                                    lifecycleOwner,
+                                    CameraSelector.DEFAULT_BACK_CAMERA,
+                                    preview,
+                                    imageAnalyzer
+                                )
+                            } catch (exc: Exception) {
+                                Log.e("QrCodeScannerScreen", "Use case binding failed", exc)
+                            }
+                        }, ContextCompat.getMainExecutor(context))
+                    }
+                )
+            } else {
+                LaunchedEffect(Unit) {
+                    onRequestPermission()
+                }
+            }
+        }
+    }
+}
+
+private class QrCodeAnalyzer(private val onQrCodeScanned: (Result) -> Unit) : ImageAnalysis.Analyzer {
+    private val reader = MultiFormatReader().apply {
+        setHints(mapOf(DecodeHintType.POSSIBLE_FORMATS to listOf(BarcodeFormat.QR_CODE)))
+    }
+
+    @OptIn(ExperimentalGetImage::class)
+    override fun analyze(image: ImageProxy) {
+        val buffer = image.planes[0].buffer
+        val data = ByteArray(buffer.remaining())
+        buffer.get(data)
+        
+        val source = PlanarYUVLuminanceSource(
+            data, image.width, image.height, 0, 0, image.width, image.height, false
+        )
+        val binarizer = HybridBinarizer(source)
+        val binaryBitmap = BinaryBitmap(binarizer)
+
+        try {
+            val result = reader.decode(binaryBitmap)
+            onQrCodeScanned(result)
+        } catch (_: Exception) {
+            // No QR code found
+        } finally {
+            image.close()
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun QrCodeScannerScreenPreview() {
+    MaterialTheme {
+        QrCodeScannerScreen(
+            onBack = {},
+            onResult = {},
+            cameraExecutor = Executors.newSingleThreadExecutor(),
+            isScanning = true,
+            onRequestPermission = {},
+            hasPermission = true
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/helper/TextDrawable.kt

@@ -0,0 +1,219 @@
+package net.helcel.cowspent.android.helper
+
+import android.graphics.*
+import android.graphics.drawable.Drawable
+import java.security.MessageDigest
+import java.security.NoSuchAlgorithmException
+import java.util.*
+import kotlin.math.max
+import kotlin.math.pow
+import kotlin.math.round
+import kotlin.math.sqrt
+
+/**
+ * A Drawable object that draws text (1 character) on top of a circular/filled background.
+ */
+class TextDrawable private constructor(
+    private val mText: String,
+    r: Int,
+    g: Int,
+    b: Int,
+    private val mRadius: Float,
+    private val mDisabled: Boolean
+) : Drawable() {
+    private val mTextPaint: Paint = Paint()
+    private val mBackground: Paint = Paint()
+    private val mDisabledCircle: Paint = Paint()
+
+    init {
+        mBackground.style = Paint.Style.FILL
+        mBackground.isAntiAlias = true
+        mBackground.color = Color.rgb(r, g, b)
+
+        if ((r + g + b) / 3 < 220) {
+            mTextPaint.color = Color.WHITE
+        } else {
+            mTextPaint.color = Color.BLACK
+        }
+        mTextPaint.textSize = mRadius
+        mTextPaint.isAntiAlias = true
+        mTextPaint.textAlign = Paint.Align.CENTER
+
+        mDisabledCircle.style = Paint.Style.STROKE
+        mDisabledCircle.strokeWidth = mRadius * 0.2f
+        mDisabledCircle.isAntiAlias = true
+        mDisabledCircle.color = Color.DKGRAY
+    }
+
+    override fun draw(canvas: Canvas) {
+        canvas.drawCircle(mRadius, mRadius, mRadius, mBackground)
+        canvas.drawText(
+            mText,
+            mRadius,
+            mRadius - (mTextPaint.descent() + mTextPaint.ascent()) / 2,
+            mTextPaint
+        )
+        if (mDisabled) {
+            canvas.drawCircle(mRadius, mRadius, mRadius * 0.9f, mDisabledCircle)
+            canvas.drawLine(
+                mRadius * 0.4f,
+                mRadius * 1.6f,
+                mRadius * 1.6f,
+                mRadius * 0.4f,
+                mDisabledCircle
+            )
+        }
+    }
+
+    override fun setAlpha(alpha: Int) {
+        mTextPaint.alpha = alpha
+    }
+
+    override fun setColorFilter(cf: ColorFilter?) {
+        mTextPaint.colorFilter = cf
+    }
+
+    @Deprecated("Deprecated in Java")
+    override fun getOpacity(): Int {
+        return PixelFormat.TRANSLUCENT
+    }
+
+    companion object {
+        private const val INDEX_RED = 0
+        private const val INDEX_GREEN = 1
+        private const val INDEX_BLUE = 2
+        private const val INDEX_HUE = 0
+        private const val INDEX_SATURATION = 1
+        private const val INDEX_LUMINATION = 2
+
+        fun getColorFromName(name: String): Int {
+            return try {
+                val hsl = calculateHSL(name)
+                val rgb = hslToRgb(hsl[0].toFloat(), hsl[1].toFloat(), hsl[2].toFloat(), 1f)
+                Color.rgb(rgb[0], rgb[1], rgb[2])
+            } catch (_: NoSuchAlgorithmException) {
+                Color.WHITE
+            }
+        }
+
+        @Throws(NoSuchAlgorithmException::class)
+        private fun calculateHSL(name: String): IntArray {
+            val result = arrayOf("0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0")
+            val rgb = doubleArrayOf(0.0, 0.0, 0.0)
+            var sat = 70
+            val lum = 68
+            val modulo = 16
+
+            var hash = name.lowercase(Locale.ROOT).replace("[^0-9a-f]".toRegex(), "")
+            if (!hash.matches("^[0-9a-f]{32}$".toRegex())) {
+                hash = md5(hash)
+            }
+
+            for (i in hash.indices) {
+                result[i % modulo] = (result[i % modulo].toInt() + hash.substring(i, i + 1).toInt(16)).toString()
+            }
+
+            for (count in 1 until modulo) {
+                rgb[count % 3] += result[count].toDouble()
+            }
+
+            rgb[INDEX_RED] = rgb[INDEX_RED] % 255
+            rgb[INDEX_GREEN] = rgb[INDEX_GREEN] % 255
+            rgb[INDEX_BLUE] = rgb[INDEX_BLUE] % 255
+
+            val hsl = rgbToHsl(rgb[INDEX_RED], rgb[INDEX_GREEN], rgb[INDEX_BLUE])
+
+            val bright = sqrt(
+                0.299 * rgb[INDEX_RED].pow(2.0) + 0.587 * rgb[INDEX_GREEN].pow(2.0) + 0.114 * rgb[INDEX_BLUE].pow(2.0)
+            )
+
+            if (bright >= 200) {
+                sat = 60
+            }
+
+            return intArrayOf((hsl[INDEX_HUE] * 360).toInt(), sat, lum)
+        }
+
+        private fun hslToRgb(hParam: Float, sParam: Float, lParam: Float, alpha: Float): IntArray {
+            var h = hParam
+            var s = sParam
+            var l = lParam
+            if (s !in 0.0f..100.0f) {
+                throw IllegalArgumentException("Color parameter outside of expected range - Saturation")
+            }
+            if (l !in 0.0f..100.0f) {
+                throw IllegalArgumentException("Color parameter outside of expected range - Luminance")
+            }
+            if (alpha !in 0.0f..1.0f) {
+                throw IllegalArgumentException("Color parameter outside of expected range - Alpha")
+            }
+
+            h %= 360.0f
+            h /= 360f
+            s /= 100f
+            l /= 100f
+
+            val q = if (l < 0.5) {
+                l * (1 + s)
+            } else {
+                (l + s) - s * l
+            }
+            val p = 2 * l - q
+            val r = round(max(0f, hueToRgb(p, q, h + 1.0f / 3.0f)) * 256).toInt()
+            val g = round(max(0f, hueToRgb(p, q, h)) * 256).toInt()
+            val b = round(max(0f, hueToRgb(p, q, h - 1.0f / 3.0f)) * 256).toInt()
+            return intArrayOf(r, g, b)
+        }
+
+        private fun hueToRgb(p: Float, q: Float, hParam: Float): Float {
+            var h = hParam
+            if (h < 0) h += 1f
+            if (h > 1) h -= 1f
+            if (6 * h < 1) return p + (q - p) * 6 * h
+            if (2 * h < 1) return q
+            if (3 * h < 2) return p + (q - p) * 6 * (2.0f / 3.0f - h)
+            return p
+        }
+
+        private fun rgbToHsl(rUntrimmed: Double, gUntrimmed: Double, bUntrimmed: Double): DoubleArray {
+            val r = rUntrimmed / 255
+            val g = gUntrimmed / 255
+            val b = bUntrimmed / 255
+            val max = max(r, max(g, b))
+            val min = r.coerceAtMost(g.coerceAtMost(b))
+            var h = (max + min) / 2
+            val s: Double
+            val l = (max + min) / 2
+            if (max == min) {
+                s = 0.0
+                h = s // achromatic
+            } else {
+                val d = max - min
+                s = if (l > 0.5) d / (2 - max - min) else d / (max + min)
+                when (max) {
+                    r -> {
+                        h = (g - b) / d + (if (g < b) 6 else 0)
+                    }
+                    g -> {
+                        h = (b - r) / d + 2
+                    }
+                    b -> {
+                        h = (r - g) / d + 4
+                    }
+                }
+                h /= 6.0
+            }
+            val hsl = DoubleArray(3)
+            hsl[INDEX_HUE] = h
+            hsl[INDEX_SATURATION] = s
+            hsl[INDEX_LUMINATION] = l
+            return hsl
+        }
+
+        @Throws(NoSuchAlgorithmException::class)
+        private fun md5(string: String): String {
+            val md5 = MessageDigest.getInstance("MD5").digest(string.toByteArray())
+            return md5.joinToString("") { "%02x".format(it) }
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/helper/Toaster.kt

@@ -0,0 +1,9 @@
+package net.helcel.cowspent.android.helper
+
+import android.content.Context
+import android.widget.Toast
+
+
+fun showToast(ctx: Context, text: CharSequence?, duration: Int = Toast.LENGTH_LONG) {
+    Toast.makeText(ctx, text, duration).show()
+}

app/src/main/java/net/helcel/cowspent/android/helper/UserAvatar.kt

@@ -0,0 +1,110 @@
+package net.helcel.cowspent.android.helper
+
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import android.graphics.BitmapFactory
+import android.util.Base64
+
+@Composable
+fun UserAvatar(
+    name: String,
+    modifier: Modifier = Modifier,
+    size: Dp = 40.dp,
+    r: Int? = null,
+    g: Int? = null,
+    b: Int? = null,
+    avatar: String? = null,
+    disabled: Boolean = false,
+    alpha: Float = 1f
+) {
+    val bitmap = remember(avatar) {
+        if (!avatar.isNullOrEmpty()) {
+            try {
+                val bytes = Base64.decode(avatar, Base64.DEFAULT)
+                BitmapFactory.decodeByteArray(bytes, 0, bytes.size)
+            } catch (_: Exception) {
+                null
+            }
+        } else {
+            null
+        }
+    }
+
+    if (bitmap != null) {
+        Image(
+            bitmap = bitmap.asImageBitmap(),
+            contentDescription = name,
+            modifier = modifier
+                .size(size)
+                .clip(CircleShape),
+            contentScale = ContentScale.Crop,
+            alpha = alpha
+        )
+    } else {
+        val backgroundColor = remember(name, r, g, b) {
+            if (r != null && g != null && b != null) {
+                Color(r, g, b)
+            } else {
+                Color(TextDrawable.getColorFromName(name))
+            }
+        }
+
+        val initials = name.take(1).uppercase()
+        val isLight = remember(backgroundColor) {
+            // Simple luminance check
+            val luminance =
+                0.2126 * backgroundColor.red + 0.7152 * backgroundColor.green + 0.0722 * backgroundColor.blue
+            luminance > 0.5
+        }
+
+        Box(
+            modifier = modifier
+                .size(size)
+                .clip(CircleShape)
+                .background((if (disabled) Color.Gray else backgroundColor).copy(alpha = alpha)),
+            contentAlignment = Alignment.Center
+        ) {
+            Text(
+                text = initials,
+                color = (if (isLight) Color.Black else Color.White).copy(alpha = alpha),
+                fontSize = (size.value * 0.5).sp,
+                fontWeight = FontWeight.Bold
+            )
+        }
+    }
+}
+
+@Preview
+@Composable
+fun UserAvatarPreview() {
+    UserAvatar(name = "Alice")
+}
+
+@Preview
+@Composable
+fun UserAvatarCustomColorPreview() {
+    UserAvatar(name = "Bob", r = 255, g = 0, b = 0)
+}
+
+@Preview
+@Composable
+fun UserAvatarDisabledPreview() {
+    UserAvatar(name = "Charlie", disabled = true)
+}

app/src/main/java/net/helcel/cowspent/android/main/BillsListComponents.kt

@@ -0,0 +1,163 @@
+package net.helcel.cowspent.android.main
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Receipt
+import androidx.compose.material.icons.filled.Repeat
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.UserAvatar
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.util.SupportUtil
+
+@Composable
+fun EmptyProjectsState(onConfigureNextcloud: () -> Unit, onAddManually: () -> Unit) {
+    Column(
+        modifier = Modifier.fillMaxSize().padding(16.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text(stringResource(R.string.no_projects_title), style = MaterialTheme.typography.h6)
+        Spacer(modifier = Modifier.height(8.dp))
+        Text(stringResource(R.string.no_projects_text))
+        Spacer(modifier = Modifier.height(16.dp))
+        Button(onClick = onConfigureNextcloud) {
+            Text(stringResource(R.string.configure_account_choice))
+        }
+        Spacer(modifier = Modifier.height(8.dp))
+        Button(onClick = onAddManually) {
+            Text(stringResource(R.string.add_project_choice))
+        }
+    }
+}
+
+@Composable
+fun EmptyMembersState() {
+    Column(
+        modifier = Modifier.fillMaxSize().padding(16.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text(stringResource(R.string.no_members_title), style = MaterialTheme.typography.h6)
+        Spacer(modifier = Modifier.height(8.dp))
+        Text(stringResource(R.string.no_members_text))
+    }
+}
+
+@Composable
+fun EmptyBillsState() {
+    Column(
+        modifier = Modifier.fillMaxSize().padding(16.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text(stringResource(R.string.no_bills_title), style = MaterialTheme.typography.h6)
+        Spacer(modifier = Modifier.height(8.dp))
+        Text(stringResource(R.string.no_bills_text))
+    }
+}
+
+@Composable
+fun BillItemRow(bill: DBBill, payer: DBMember?, onClick: () -> Unit) {
+    Row {
+        Spacer(Modifier.width(16.dp))
+        Divider(thickness = 1.dp, modifier=Modifier.width(40.dp))
+    }
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable(onClick = onClick)
+            .padding(16.dp, 10.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        if (payer != null) {
+            Box {
+                UserAvatar(
+                    name = payer.name,
+                    r = payer.r,
+                    g = payer.g,
+                    b = payer.b,
+                    avatar = payer.avatar,
+                    disabled = !payer.isActivated,
+                    size = 40.dp
+                )
+                if (bill.repeat != null && bill.repeat != DBBill.NON_REPEATED) {
+                    Icon(
+                        Icons.Default.Repeat,
+                        contentDescription = null,
+                        modifier = Modifier
+                            .align(Alignment.CenterStart)
+                            .size(24.dp)
+                            .offset((-8).dp)
+                            .background(MaterialTheme.colors.onSurface, CircleShape)
+                            .padding(2.dp),
+                        tint = MaterialTheme.colors.surface
+                    )
+                }
+            }
+        } else {
+            Icon(
+                Icons.Default.Receipt,
+                contentDescription = null,
+                modifier = Modifier.size(40.dp),
+                tint = MaterialTheme.colors.primary
+            )
+        }
+        Spacer(modifier = Modifier.width(16.dp))
+        Column(modifier = Modifier.weight(1f)) {
+            Text(bill.formattedWhat.ifEmpty { bill.what }, fontWeight = FontWeight.Bold)
+            Text(
+                text = bill.formattedSubtitle.ifEmpty { bill.comment ?: "" },
+                style = MaterialTheme.typography.caption,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis
+            )
+        }
+        Column(horizontalAlignment = Alignment.End) {
+            Text(
+                text = SupportUtil.normalNumberFormat.format(bill.amount),
+                style = MaterialTheme.typography.h6,
+                fontWeight = FontWeight.Bold
+            )
+        }
+    }
+}
+
+@Composable
+fun SectionHeader(title: String) {
+    Surface(
+        color = MaterialTheme.colors.background,
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        Divider(thickness = 2.dp)
+        Text(
+            text = title,
+            modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp),
+            style = MaterialTheme.typography.caption.copy(fontWeight = FontWeight.Bold),
+            color = MaterialTheme.colors.primary
+        )
+    }
+}
+
+@Composable
+fun EmptyState() {
+    Column(
+        modifier = Modifier.fillMaxSize(),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text(stringResource(R.string.no_bills_title), style = MaterialTheme.typography.h6)
+        Text(stringResource(R.string.no_bills_text), modifier = Modifier.padding(16.dp))
+    }
+}

app/src/main/java/net/helcel/cowspent/android/main/BillsListScreen.kt

@@ -0,0 +1,586 @@
+package net.helcel.cowspent.android.main
+
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.widget.Toast
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.ExperimentalMaterialApi
+import androidx.compose.material.FloatingActionButton
+import androidx.compose.material.Icon
+import androidx.compose.material.IconButton
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Scaffold
+import androidx.compose.material.Text
+import androidx.compose.material.TextField
+import androidx.compose.material.TextFieldDefaults
+import androidx.compose.material.TopAppBar
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Category
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material.icons.filled.Search
+import androidx.compose.material.pullrefresh.PullRefreshIndicator
+import androidx.compose.material.pullrefresh.pullRefresh
+import androidx.compose.material.pullrefresh.rememberPullRefreshState
+import androidx.compose.material.rememberScaffoldState
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.RectangleShape
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Dialog
+import androidx.compose.ui.window.DialogProperties
+import androidx.preference.PreferenceManager
+import kotlinx.coroutines.launch
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.drawer.Drawer
+import net.helcel.cowspent.android.helper.StatefulAlertDialog
+import net.helcel.cowspent.android.project.ProjectOptionsDialogContent
+import net.helcel.cowspent.android.project.ProjectShareDialogContent
+import net.helcel.cowspent.android.project.member.MemberAddDialogContent
+import net.helcel.cowspent.android.project.member.MemberEditDialogContent
+import net.helcel.cowspent.android.project.member.MemberManagementDialogContent
+import net.helcel.cowspent.android.project.settle.ProjectSettlementDialogContent
+import net.helcel.cowspent.android.statistics.ProjectStatisticsActivity
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.model.DBProject
+import net.helcel.cowspent.model.SectionItem
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.util.IRefreshBillsListCallback
+
+@OptIn(ExperimentalMaterialApi::class)
+@Composable
+fun BillsListScreen(
+    viewModel: BillsListViewModel,
+    db: CowspentSQLiteOpenHelper,
+    refreshCallback: IRefreshBillsListCallback,
+    onAddBillClick: () -> Unit,
+    onBillClick: (DBBill) -> Unit,
+    onProjectClick: (Long) -> Unit,
+    onProjectOptionsClick: (Long) -> Unit,
+    onProjectAction: (Long, Int) -> Unit,
+    onAccountSwitcherClick: () -> Unit,
+    onAddProjectClick: () -> Unit,
+    onAppSettingsClick: () -> Unit,
+    onLabelBillsClick: () -> Unit,
+    onRefresh: () -> Unit
+) {
+    val scaffoldState = rememberScaffoldState()
+    val scope = rememberCoroutineScope()
+    var isSearchExpanded by remember { mutableStateOf(false) }
+    val focusRequester = remember { FocusRequester() }
+
+    LaunchedEffect(isSearchExpanded) {
+        if (isSearchExpanded) {
+            focusRequester.requestFocus()
+        }
+    }
+
+    LaunchedEffect(viewModel.searchQuery) {
+        refreshCallback.refreshLists(false)
+    }
+
+    val pullRefreshState = rememberPullRefreshState(viewModel.isRefreshing, onRefresh)
+    val context = LocalContext.current
+    val memberAlreadyExistsError = stringResource(R.string.member_already_exists)
+    val sharedPreferences = remember { PreferenceManager.getDefaultSharedPreferences(context) }
+    val showArchived = sharedPreferences.getBoolean(stringResource(R.string.pref_key_show_archived), false)
+
+    StatefulAlertDialog(
+        state = viewModel.dialogState,
+        onDismissRequest = { viewModel.dismissDialog() }
+    )
+
+    val projectOptionsProjectId = viewModel.showProjectOptionsDialogByProjectId
+    if (projectOptionsProjectId != null) {
+        val proj = remember(projectOptionsProjectId, viewModel.projects) {
+            viewModel.projects.find { it.id == projectOptionsProjectId }
+        }
+        Dialog(
+            onDismissRequest = { viewModel.showProjectOptionsDialogByProjectId = null },
+        ) {
+            ProjectOptionsDialogContent(
+                onEditProject = {
+                    onProjectAction(projectOptionsProjectId, 0)
+                    viewModel.showProjectOptionsDialogByProjectId = null
+                },
+                onRemoveProject = {
+                    onProjectAction(projectOptionsProjectId, 1)
+                    viewModel.showProjectOptionsDialogByProjectId = null
+                },
+                onManageMembers = {
+                    onProjectAction(projectOptionsProjectId, 2)
+                    viewModel.showProjectOptionsDialogByProjectId = null
+                },
+                onManageCurrencies = {
+                    onProjectAction(projectOptionsProjectId, 3)
+                    viewModel.showProjectOptionsDialogByProjectId = null
+                },
+                onStatistics = {
+                    onProjectAction(projectOptionsProjectId, 4)
+                    viewModel.showProjectOptionsDialogByProjectId = null
+                },
+                onSettle = {
+                    onProjectAction(projectOptionsProjectId, 5)
+                    viewModel.showProjectOptionsDialogByProjectId = null
+                },
+                onShareProject = {
+                    onProjectAction(projectOptionsProjectId, 6)
+                    viewModel.showProjectOptionsDialogByProjectId = null
+                },
+                onExportProject = {
+                    onProjectAction(projectOptionsProjectId, 7)
+                    viewModel.showProjectOptionsDialogByProjectId = null
+                },
+                onDismiss = { viewModel.showProjectOptionsDialogByProjectId = null },
+                isArchived = proj?.isArchived == true,
+                accessLevel = proj?.myAccessLevel ?: DBProject.ACCESS_LEVEL_ADMIN,
+                isShareable = proj?.isShareable() ?: true
+            )
+        }
+    }
+
+    val settlementProjectId = viewModel.showSettlementDialogByProjectId
+    if (settlementProjectId != null) {
+        val proj = remember(settlementProjectId, viewModel.projects) {
+            viewModel.projects.find { it.id == settlementProjectId }
+        }
+        if (proj != null) {
+            Dialog(
+                onDismissRequest = { viewModel.showSettlementDialogByProjectId = null },
+                properties = DialogProperties(usePlatformDefaultWidth = false)
+            ) {
+                ProjectSettlementDialogContent(
+                    proj = proj,
+                    db = db,
+                    onSettleBills = { transactions ->
+                        BillsListUtils.createBillsFromTransactions(
+                            db,
+                            settlementProjectId,
+                            transactions,
+                            refreshCallback,
+                            context
+                        )
+                        viewModel.showSettlementDialogByProjectId = null
+                    },
+                    onShare = { transactions, memberIdToName ->
+                        BillsListUtils.shareSettlement(context, proj, transactions, memberIdToName)
+                    },
+                    onDismiss = { viewModel.showSettlementDialogByProjectId = null }
+                )
+            }
+        }
+    }
+
+    val statisticsProjectId = viewModel.showStatisticsDialogByProjectId
+    if (statisticsProjectId != null) {
+        LaunchedEffect(statisticsProjectId) {
+            context.startActivity(
+                ProjectStatisticsActivity.createIntent(
+                    context,
+                    statisticsProjectId
+                )
+            )
+            viewModel.showStatisticsDialogByProjectId = null
+        }
+    }
+
+    val manageMembersProjectId = viewModel.showMemberManagementDialogByProjectId
+    if (manageMembersProjectId != null) {
+        val members = viewModel.members // Use members from ViewModel as they are already loaded
+        Dialog(
+            onDismissRequest = { viewModel.showMemberManagementDialogByProjectId = null },
+            properties = DialogProperties(usePlatformDefaultWidth = false)
+        ) {
+            MemberManagementDialogContent(
+                members = members,
+                onAddMember = {
+                    viewModel.showAddMemberDialogByProjectId = manageMembersProjectId
+                    viewModel.showMemberManagementDialogByProjectId = null
+                },
+                onEditMember = { member ->
+                    viewModel.showEditMemberDialogByProjectId = member.id
+                    viewModel.showMemberManagementDialogByProjectId = null
+                },
+                onDismiss = { viewModel.showMemberManagementDialogByProjectId = null }
+            )
+        }
+    }
+
+    val addMemberProjectId = viewModel.showAddMemberDialogByProjectId
+    if (addMemberProjectId != null) {
+        Dialog(
+            onDismissRequest = { viewModel.showAddMemberDialogByProjectId = null },
+            properties = DialogProperties(usePlatformDefaultWidth = false)
+        ) {
+            MemberAddDialogContent(
+                onAdd = { memberName ->
+                    val memberNames =
+                        db.getMembersOfProject(addMemberProjectId, null).map { it.name }
+                    if (memberNames.contains(memberName)) {
+                        Toast.makeText(
+                            context,
+                            memberAlreadyExistsError,
+                            Toast.LENGTH_SHORT
+                        ).show()
+                    } else {
+                        val color = net.helcel.cowspent.android.helper.TextDrawable.getColorFromName(memberName)
+                        db.addMemberAndSync(
+                            DBMember(
+                                0,
+                                0,
+                                addMemberProjectId,
+                                memberName,
+                                true,
+                                1.0,
+                                DBBill.STATE_ADDED,
+                                android.graphics.Color.red(color),
+                                android.graphics.Color.green(color),
+                                android.graphics.Color.blue(color),
+                                null,
+                                null
+                            )
+                        )
+                        refreshCallback.refreshLists(false)
+                        viewModel.showAddMemberDialogByProjectId = null
+                        viewModel.showMemberManagementDialogByProjectId = addMemberProjectId
+                    }
+                },
+                onDismiss = { 
+                    viewModel.showAddMemberDialogByProjectId = null
+                    viewModel.showMemberManagementDialogByProjectId = addMemberProjectId
+                }
+            )
+        }
+    }
+
+    val editMemberId = viewModel.showEditMemberDialogByProjectId
+    if (editMemberId != null) {
+        val memberToEdit = remember(editMemberId, viewModel.members) {
+            viewModel.members.find { it.id == editMemberId }
+        }
+        if (memberToEdit != null) {
+            Dialog(
+                onDismissRequest = { viewModel.showEditMemberDialogByProjectId = null },
+                properties = DialogProperties(usePlatformDefaultWidth = false)
+            ) {
+                MemberEditDialogContent(
+                    member = memberToEdit,
+                    onSave = { name, weight, isActivated, r, g, b ->
+                        db.updateMemberAndSync(
+                            memberToEdit,
+                            name,
+                            weight,
+                            isActivated,
+                            r,
+                            g,
+                            b,
+                            "",
+                            ""
+                        )
+                        refreshCallback.refreshLists(false)
+                        viewModel.showEditMemberDialogByProjectId = null
+                        viewModel.showMemberManagementDialogByProjectId = memberToEdit.projectId
+                    },
+                    onDelete = {
+                        db.deleteMember(editMemberId)
+                        refreshCallback.refreshLists(false)
+                        viewModel.showEditMemberDialogByProjectId = null
+                        viewModel.showMemberManagementDialogByProjectId = memberToEdit.projectId
+                    },
+                    onDismiss = { 
+                        viewModel.showEditMemberDialogByProjectId = null
+                        viewModel.showMemberManagementDialogByProjectId = memberToEdit.projectId
+                    }
+                )
+            }
+        }
+    }
+
+    val shareProjectId = viewModel.showShareDialogByProjectId
+    if (shareProjectId != null) {
+        val proj = remember(shareProjectId, viewModel.projects) {
+            viewModel.projects.find { it.id == shareProjectId }
+        }
+        if (proj != null) {
+            val shareIntentTitle = stringResource(R.string.share_share_intent_title, proj.name)
+            val shareChooserTitle = stringResource(R.string.share_share_chooser_title, proj.name)
+            Dialog(
+                onDismissRequest = { viewModel.showShareDialogByProjectId = null },
+                properties = DialogProperties(usePlatformDefaultWidth = false)
+            ) {
+                ProjectShareDialogContent(
+                    proj = proj,
+                    onShare = { shareUrl ->
+                        val shareIntent = Intent().apply {
+                            action = Intent.ACTION_SEND
+                            type = "text/plain"
+                            putExtra(Intent.EXTRA_SUBJECT, shareIntentTitle)
+                            putExtra(Intent.EXTRA_TEXT, shareUrl)
+                        }
+                        val chooserIntent = Intent.createChooser(shareIntent, shareChooserTitle)
+                        context.startActivity(chooserIntent)
+                    },
+                    onDismiss = { viewModel.showShareDialogByProjectId = null }
+                )
+            }
+        }
+    }
+
+    Scaffold(
+        scaffoldState = scaffoldState,
+        drawerShape = RectangleShape,
+        topBar = {
+            TopAppBar(
+                title = {
+                    if (isSearchExpanded) {
+                        TextField(
+                            value = viewModel.searchQuery,
+                            onValueChange = { viewModel.searchQuery = it },
+                            placeholder = { Text(stringResource(R.string.action_search), color = MaterialTheme.colors.onPrimary.copy(alpha = 0.7f)) },
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .focusRequester(focusRequester),
+                            colors = TextFieldDefaults.textFieldColors(
+                                backgroundColor = Color.Transparent,
+                                cursorColor = MaterialTheme.colors.onPrimary,
+                                textColor = MaterialTheme.colors.onPrimary,
+                                focusedIndicatorColor = Color.Transparent,
+                                unfocusedIndicatorColor = Color.Transparent
+                            ),
+                            singleLine = true,
+                            trailingIcon = {
+                                IconButton(onClick = {
+                                    isSearchExpanded = false
+                                    viewModel.searchQuery = ""
+                                }) {
+                                    Icon(Icons.Default.Close, contentDescription = null, tint = MaterialTheme.colors.onPrimary)
+                                }
+                            }
+                        )
+                    } else {
+                        Column {
+                            if (viewModel.title.isNotEmpty()) Text(viewModel.title)
+                            else Text(stringResource(R.string.app_name))
+                        }
+                    }
+                },
+                navigationIcon = {
+                    if (isSearchExpanded) {
+                        IconButton(onClick = {
+                            isSearchExpanded = false
+                            viewModel.searchQuery = ""
+                        }) {
+                            Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                        }
+                    } else {
+                        IconButton(onClick = {
+                            scope.launch { scaffoldState.drawerState.open() }
+                        }) {
+                            Icon(Icons.Default.Menu, contentDescription = null)
+                        }
+                    }
+                },
+                actions = {
+                    if (!isSearchExpanded) {
+                        if (viewModel.hasUnlabeledBills) {
+                            IconButton(onClick = onLabelBillsClick) {
+                                Icon(
+                                    Icons.Default.Category,
+                                    contentDescription = stringResource(R.string.action_label_bills)
+                                )
+                            }
+                        }
+                        IconButton(onClick = { isSearchExpanded = true }) {
+                            Icon(Icons.Default.Search, contentDescription = null)
+                        }
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.primary,
+                elevation = 4.dp
+            )
+        },
+        floatingActionButton = {
+            val selectedProject = viewModel.projects.find { it.id == viewModel.selectedProjectId }
+            if (selectedProject != null && !selectedProject.isArchived) {
+                FloatingActionButton(onClick = onAddBillClick) {
+                    Icon(Icons.Default.Add, contentDescription = stringResource(R.string.action_create_bill))
+                }
+            }
+        },
+        drawerContent = {
+            Drawer(
+                projects = viewModel.projects,
+                members = viewModel.members,
+                memberBalances = viewModel.memberBalances,
+                selectedProjectId = viewModel.selectedProjectId,
+                selectedMemberId = viewModel.selectedMemberId,
+                lastSyncText = viewModel.lastSyncText,
+                showArchived = showArchived,
+                onProjectClick = {
+                    viewModel.selectedMemberId = null
+                    onProjectClick(it)
+                    scope.launch { scaffoldState.drawerState.close() }
+                },
+                onProjectOptionsClick = {
+                    onProjectOptionsClick(it)
+                },
+                onMemberClick = { memberId ->
+                    viewModel.selectedMemberId = memberId
+                    refreshCallback.refreshLists(false)
+                    scope.launch { scaffoldState.drawerState.close() }
+                },
+                onAddProjectClick = {
+                    onAddProjectClick()
+                    scope.launch { scaffoldState.drawerState.close() }
+                },
+                onAppSettingsClick = {
+                    onAppSettingsClick()
+                    scope.launch { scaffoldState.drawerState.close() }
+                }
+            )
+        }
+    ) { padding ->
+        // Pull-to-refresh is not officially in Material 2 basic components, 
+        // but we can use SwipeRefresh from accompanist or implement it manually.
+        // For simplicity and following common practices, I'll assume standard swipe refresh logic.
+        // Actually, there is androidx.compose.material.pullrefresh.pullRefresh in later Material 2.
+        
+        Box(modifier = Modifier
+            .padding(padding)
+            .fillMaxSize()
+            .pullRefresh(pullRefreshState)) {
+            when {
+                viewModel.showNoProjects -> EmptyProjectsState(onAccountSwitcherClick, onAddProjectClick)
+                viewModel.showNoMembers -> EmptyMembersState()
+                viewModel.showNoBills -> EmptyBillsState()
+                viewModel.bills.isEmpty() -> EmptyState()
+                else -> {
+                    LazyColumn(modifier = Modifier.fillMaxSize()) {
+                        items(viewModel.bills) { item ->
+                            when (item) {
+                                is DBBill -> {
+                                    val payer = viewModel.members.find { it.id == item.payerId }
+                                    BillItemRow(item, payer, onClick = { onBillClick(item) })
+                                }
+                                is SectionItem -> SectionHeader(item.title)
+                            }
+                        }
+                    }
+                }
+            }
+            PullRefreshIndicator(
+                refreshing = viewModel.isRefreshing,
+                state = pullRefreshState,
+                modifier = Modifier.align(Alignment.TopCenter)
+            )
+        }
+    }
+}
+
+
+
+@Preview(showBackground = true)
+@Composable
+fun BillItemRowPreview() {
+    MaterialTheme {
+        BillItemRow(
+            bill = DBBill(0, 0, 0, 1, 15.0, System.currentTimeMillis() / 1000, "Dinner", 0, "n", null, 0, "", 0).apply {
+                formattedWhat = "Dinner"
+                formattedSubtitle = "Alice \u2192 Group"
+            },
+            payer = DBMember(1, 0, 0, "Alice", true, 1.0, 0, null, null, null, null, null),
+            onClick = {}
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun SectionHeaderPreview() {
+    MaterialTheme {
+        SectionHeader(title = "October 2023")
+    }
+}
+
+@SuppressLint("ViewModelConstructorInComposable")
+@Preview(showBackground = true)
+@Composable
+fun BillsListScreenPreview() {
+    MaterialTheme {
+        BillsListScreen(
+            viewModel = BillsListViewModel().apply {
+                title = "Demo Project"
+                members = listOf(
+                    DBMember(1, 0, 0, "Alice", true, 1.0, 0, null, null, null, null, null)
+                )
+                bills = listOf(
+                    SectionItem("Today"),
+                    DBBill(0, 0, 0, 1, 10.0, System.currentTimeMillis() / 1000, "Lunch", 0, "n", null, 0, "", 0).apply {
+                        formattedWhat = "Lunch"
+                        formattedSubtitle = "Alice \u2192 Group"
+                    }
+                )
+            },
+            db = CowspentSQLiteOpenHelper.getInstance(LocalContext.current),
+            refreshCallback = object : IRefreshBillsListCallback {
+                override fun refreshLists(scrollToTop: Boolean) {}
+            },
+            onAddBillClick = {},
+            onBillClick = {},
+            onProjectClick = {},
+            onProjectOptionsClick = {},
+            onProjectAction = { _, _ -> },
+            onAccountSwitcherClick = {},
+            onAddProjectClick = {},
+            onAppSettingsClick = {},
+            onLabelBillsClick = {},
+            onRefresh = {}
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun EmptyProjectsStatePreview() {
+    MaterialTheme {
+        EmptyProjectsState(onConfigureNextcloud = {}, onAddManually = {})
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun EmptyMembersStatePreview() {
+    MaterialTheme {
+        EmptyMembersState()
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun EmptyBillsStatePreview() {
+    MaterialTheme {
+        EmptyBillsState()
+    }
+}

app/src/main/java/net/helcel/cowspent/android/main/BillsListUtils.kt

@@ -0,0 +1,117 @@
+package net.helcel.cowspent.android.main
+
+import android.content.Context
+import android.content.Intent
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.*
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.util.IRefreshBillsListCallback
+import java.text.SimpleDateFormat
+import java.util.*
+import kotlin.math.round
+
+object BillsListUtils {
+    fun groupAndSectionBills(
+        bills: List<DBBill>,
+        membersMap: Map<Long, DBMember>,
+        sdf: SimpleDateFormat,
+        context: Context
+    ): List<Item> {
+        val groupedBillsList = mutableListOf<DBBill>()
+        val groups = bills.groupBy { "${it.what}|${it.date}|${it.time}|${it.payerId}" }
+        val seenGroups = mutableSetOf<String>()
+        
+        for (bill in bills) {
+            val groupKey = "${bill.what}|${bill.date}|${bill.time}|${bill.payerId}"
+            if (groupKey !in seenGroups) {
+                val group = groups[groupKey]!!
+                if (group.size == 1) {
+                    groupedBillsList.add(bill)
+                } else {
+                    val groupedBill = GroupedBill(group)
+                    val payerName = membersMap[groupedBill.payerId]?.name ?: groupedBill.payerId.toString()
+                    val allOwerIds = group.flatMap { it.billOwersIds }.distinct()
+                    val owersNames = allOwerIds.joinToString(", ") { id ->
+                        membersMap[id]?.name ?: id.toString()
+                    }
+                    groupedBill.formattedSubtitle = "$payerName \u2192 $owersNames"
+                    groupedBillsList.add(groupedBill)
+                }
+                seenGroups.add(groupKey)
+            }
+        }
+
+        val itemList: MutableList<Item> = ArrayList()
+        var lastDate = ""
+        val androidDateFormat = android.text.format.DateFormat.getDateFormat(context)
+        
+        for (bill in groupedBillsList) {
+            val billDate = bill.date
+            if (billDate != lastDate) {
+                val date = try { sdf.parse(billDate) } catch (_: Exception) { null }
+                val formattedDate = date?.let { androidDateFormat.format(it) } ?: billDate
+                itemList.add(SectionItem(formattedDate))
+                lastDate = billDate
+            }
+            itemList.add(bill)
+        }
+        return itemList
+    }
+
+    fun shareSettlement(
+        context: Context,
+        proj: DBProject,
+        transactions: List<Transaction>,
+        memberIdToName: Map<Long, String>
+    ) {
+        val projectName = proj.name.ifEmpty { proj.remoteId }
+        var text = context.getString(R.string.share_settle_intro, projectName) + "\n"
+        for (t in transactions) {
+            val amount = round(t.amount * 100.0) / 100.0
+            text += "\n" + context.getString(
+                R.string.share_settle_sentence,
+                memberIdToName[t.owerMemberId],
+                memberIdToName[t.receiverMemberId],
+                amount
+            )
+        }
+        val shareIntent = Intent()
+        shareIntent.action = Intent.ACTION_SEND
+        shareIntent.type = "text/plain"
+        shareIntent.putExtra(
+            Intent.EXTRA_SUBJECT,
+            context.getString(R.string.share_settle_title, projectName)
+        )
+        shareIntent.putExtra(Intent.EXTRA_TEXT, text)
+        val chooserIntent = Intent.createChooser(
+            shareIntent,
+            context.getString(R.string.share_settle_title, projectName)
+        )
+        context.startActivity(chooserIntent)
+    }
+
+    fun createBillsFromTransactions(
+        db: CowspentSQLiteOpenHelper,
+        projectId: Long,
+        transactions: List<Transaction>,
+        refreshCallback: IRefreshBillsListCallback,
+        context: Context
+    ) {
+        val timestamp = System.currentTimeMillis() / 1000
+        for (t in transactions) {
+            val owerId = t.owerMemberId
+            val receiverId = t.receiverMemberId
+            val amount = t.amount
+            val bill = DBBill(
+                0, 0, projectId, owerId, amount,
+                timestamp, context.getString(R.string.settle_bill_what),
+                DBBill.STATE_ADDED, DBBill.NON_REPEATED,
+                DBBill.PAYMODE_NONE, DBBill.CATEGORY_NONE,
+                "", DBBill.PAYMODE_ID_NONE
+            )
+            bill.billOwers += DBBillOwer(0, 0, receiverId)
+            db.addBill(bill)
+        }
+        refreshCallback.refreshLists(true)
+    }
+}

app/src/main/java/net/helcel/cowspent/android/main/BillsListViewActivity.kt

@@ -0,0 +1,827 @@
+package net.helcel.cowspent.android.main
+
+import android.Manifest
+import android.app.SearchManager
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.content.pm.PackageManager
+import android.graphics.BitmapFactory
+import android.net.Uri
+import android.os.Build
+import android.os.Bundle
+import android.os.Environment
+import android.util.Base64
+import android.util.Log
+import android.widget.Toast
+import androidx.activity.OnBackPressedCallback
+import androidx.activity.compose.setContent
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.view.ActionMode
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.AddCircleOutline
+import androidx.compose.material.icons.filled.Sync
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+import androidx.core.content.edit
+import androidx.core.net.toUri
+import androidx.lifecycle.lifecycleScope
+import androidx.preference.PreferenceManager
+import com.nextcloud.android.sso.helper.SingleAccountHelper
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.account.AccountActivity
+import net.helcel.cowspent.android.bill_edit.EditBillActivity
+import net.helcel.cowspent.android.bill_label.LabelBillsActivity
+import net.helcel.cowspent.android.currencies.ManageCurrenciesActivity
+import net.helcel.cowspent.android.helper.showToast
+import net.helcel.cowspent.android.project.create.NewProjectActivity
+import net.helcel.cowspent.android.project.edit.EditProjectActivity
+import net.helcel.cowspent.android.settings.PreferencesActivity
+import net.helcel.cowspent.model.Category
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBProject
+import net.helcel.cowspent.model.GroupedBill
+import net.helcel.cowspent.model.ProjectType
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.persistence.CowspentServerSyncHelper
+import net.helcel.cowspent.theme.ThemeUtils
+import net.helcel.cowspent.util.BillFormatter
+import net.helcel.cowspent.util.CospendClientUtil
+import net.helcel.cowspent.util.ExportUtil
+import net.helcel.cowspent.util.ICallback
+import net.helcel.cowspent.util.IRefreshBillsListCallback
+import net.helcel.cowspent.util.SupportUtil
+import java.io.IOException
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Locale
+
+class BillsListViewActivity :
+    AppCompatActivity(),
+    IRefreshBillsListCallback {
+
+    private val viewModel: BillsListViewModel by viewModels()
+
+    companion object {
+        var DEBUG = false
+
+        private val TAG = BillsListViewActivity::class.java.simpleName
+
+        private const val SAVED_STATE_NAVIGATION_SELECTION = "navigationSelection"
+        private const val SAVED_STATE_NAVIGATION_OPEN = "navigationOpen"
+
+        private var contentToExport = ""
+        var isActivityVisible = false
+            private set
+    }
+
+    private var navigationSelection = Category(null, null)
+    private var navigationOpen: String? = ""
+
+    private var mActionMode: ActionMode? = null
+    private lateinit var db: CowspentSQLiteOpenHelper
+    
+    private val syncCallBack = object : ICallback {
+        override fun onFinish() {
+            mActionMode?.finish()
+            refreshLists()
+            viewModel.isRefreshing = false
+        }
+
+        override fun onFinish(result: String, message: String) {}
+
+        override fun onScheduled() {
+            viewModel.isRefreshing = false
+        }
+    }
+
+    private val addProjectLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+        val data = result.data
+        if (result.resultCode == RESULT_OK && data != null) {
+            var pid = data.getLongExtra(MainConstants.CREATED_PROJECT, 0)
+            var created = true
+            if (pid == 0L) {
+                created = false
+                pid = data.getLongExtra(MainConstants.ADDED_PROJECT, 0)
+            }
+            if (DEBUG) Log.d(TAG, "BILLS request code : addproject $pid")
+            if (pid != 0L) {
+                viewModel.selectedMemberId = null
+                setSelectedProject(pid)
+                Log.d(TAG, "CREATED project id: $pid")
+                lifecycleScope.launch {
+                    val addedProj = withContext(Dispatchers.IO) { db.getProject(pid) }
+                    val message: String
+                    val title: String
+                    if (created) {
+                        Log.e(TAG, "CREATED !!!")
+                        title = getString(R.string.project_create_success_title)
+                        message = getString(R.string.project_create_success_message, addedProj?.remoteId)
+                    } else {
+                        Log.e(TAG, "ADDED !!!")
+                        title = getString(R.string.project_add_success_title)
+                        message = getString(R.string.project_add_success_message, addedProj?.remoteId)
+                    }
+                    showDialog(message, title, Icons.Default.AddCircleOutline)
+                }
+            }
+        }
+        setupDrawerProjects()
+    }
+
+    private val serverSettingsLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+        if (result.resultCode == RESULT_OK) {
+            updateUsernameInDrawer()
+            db = CowspentSQLiteOpenHelper.getInstance(this)
+            if (CowspentServerSyncHelper.isNextcloudAccountConfigured(applicationContext)) {
+                db.cowspentServerSyncHelper.runAccountProjectsSync()
+            }
+            if (!db.cowspentServerSyncHelper.isSyncPossible) {
+                if (CowspentServerSyncHelper.isNextcloudAccountConfigured(applicationContext)) {
+                    Toast.makeText(applicationContext, getString(R.string.error_sync, getString(CospendClientUtil.LoginStatus.NO_NETWORK.str)), Toast.LENGTH_LONG).show()
+                }
+            }
+        }
+    }
+
+    private val createBillLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
+    }
+
+    private val editBillLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+        val data = result.data
+        if (result.resultCode == RESULT_OK && data != null) {
+            val billId = data.getLongExtra(MainConstants.BILL_TO_DUPLICATE, 0)
+            if (billId != 0L) {
+                duplicateBill(billId)
+            }
+        }
+    }
+
+    private val editProjectLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+        val data = result.data
+        if (result.resultCode == RESULT_OK && data != null) {
+            var pid = data.getLongExtra(MainConstants.DELETED_PROJECT, 0)
+            if (pid != 0L) {
+                setSelectedProject(0)
+            }
+            pid = data.getLongExtra(MainConstants.EDITED_PROJECT, 0)
+            if (pid != 0L) {
+                viewModel.selectedMemberId = null
+                setSelectedProject(pid)
+            }
+        }
+        setupDrawerProjects()
+    }
+
+    private val labelBillsLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
+        refreshLists()
+    }
+
+    private val saveFileLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+        val data = result.data
+        if (result.resultCode == RESULT_OK && data != null) {
+            val fileUri = data.data
+            fileUri?.let { saveToFileUri(contentToExport, it) }
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        isActivityVisible = true
+        if (savedInstanceState != null) {
+            navigationSelection = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                savedInstanceState.getSerializable(SAVED_STATE_NAVIGATION_SELECTION, Category::class.java)!!
+            } else {
+                @Suppress("DEPRECATION")
+                savedInstanceState.getSerializable(SAVED_STATE_NAVIGATION_SELECTION) as Category
+            }
+            navigationOpen = savedInstanceState.getString(SAVED_STATE_NAVIGATION_OPEN)
+        }
+
+        db = CowspentSQLiteOpenHelper.getInstance(this)
+
+        setupDrawerProjects()
+
+        updateUsernameInDrawer()
+
+        setContent {
+            ThemeUtils.CowspentTheme {
+                BillsListScreen(
+                    viewModel = viewModel,
+                    db = db,
+                    refreshCallback = this,
+                    onAddBillClick = {
+                        val selectedProjectId = PreferenceManager.getDefaultSharedPreferences(applicationContext).getLong("selected_project", 0)
+                        if (selectedProjectId != 0L) {
+                            lifecycleScope.launch {
+                                val members = withContext(Dispatchers.IO) { db.getActivatedMembersOfProject(selectedProjectId) }
+                                if (members.isEmpty()) {
+                                    showToast(this@BillsListViewActivity, getString(R.string.add_bill_impossible_no_member))
+                                } else {
+                                    val proj = withContext(Dispatchers.IO) { db.getProject(selectedProjectId) }
+                                    val createIntent = Intent(applicationContext, EditBillActivity::class.java).apply {
+                                        putExtra(EditBillActivity.PARAM_PROJECT_ID, selectedProjectId)
+                                        putExtra(EditBillActivity.PARAM_PROJECT_TYPE, proj?.type?.id)
+                                    }
+                                    createBillLauncher.launch(createIntent)
+                                }
+                            }
+                        }
+                    },
+                    onBillClick = { bill: DBBill ->
+                        lifecycleScope.launch {
+                            val pid = PreferenceManager.getDefaultSharedPreferences(applicationContext).getLong("selected_project", 0)
+                            val proj = withContext(Dispatchers.IO) { db.getProject(pid) }
+                            val intent = Intent(applicationContext, EditBillActivity::class.java).apply {
+                                if (bill is GroupedBill) {
+                                    val ids = bill.sourceBills.map { it.id }.toLongArray()
+                                    putExtra(EditBillActivity.PARAM_GROUPED_BILL_IDS, ids)
+                                } else {
+                                    putExtra(EditBillActivity.PARAM_BILL_ID, bill.id)
+                                }
+                                putExtra(EditBillActivity.PARAM_PROJECT_TYPE, proj?.type?.id)
+                                putExtra(EditBillActivity.PARAM_PROJECT_ID, pid)
+                            }
+                            editBillLauncher.launch(intent)
+                        }
+                    },
+                    onProjectClick = { pid: Long -> onProjectClick(pid) },
+                    onProjectOptionsClick = { pid: Long -> onManageProjectClick(pid) },
+                    onProjectAction = { pid, actionIndex ->
+                        when (actionIndex) {
+                            0 -> onEditProjectClick(pid)
+                            1 -> onRemoveProjectClick(pid)
+                            2 -> onManageMembersClick(pid)
+                            3 -> onManageCurrenciesClick(pid)
+                            4 -> onProjectStatisticsClick(pid)
+                            5 -> onSettleProjectClick(pid)
+                            6 -> onShareProjectClick(pid)
+                            7 -> onExportProjectClick(pid)
+                        }
+                    },
+                    onAccountSwitcherClick = {
+                        serverSettingsLauncher.launch(Intent(this, AccountActivity::class.java))
+                    },
+                    onAddProjectClick = { addProject() },
+                    onAppSettingsClick = {
+                        serverSettingsLauncher.launch(Intent(this, PreferencesActivity::class.java))
+                    },
+                    onLabelBillsClick = {
+                        val selectedProjectId = PreferenceManager.getDefaultSharedPreferences(applicationContext).getLong("selected_project", 0)
+                        if (selectedProjectId != 0L) {
+                            labelBillsLauncher.launch(LabelBillsActivity.createIntent(this, selectedProjectId))
+                        }
+                    },
+                    onRefresh = { synchronize(true) }
+                )
+            }
+        }
+
+        lifecycleScope.launch {
+            val empty = withContext(Dispatchers.IO) { db.projects.isEmpty() }
+            if (empty && !CowspentServerSyncHelper.isNextcloudAccountConfigured(this@BillsListViewActivity)) {
+                viewModel.showNoProjects = true
+            }
+
+            val preferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+            val selectedProjectId = preferences.getLong("selected_project", 0)
+            if (selectedProjectId == 0L) {
+                val dbProjects = withContext(Dispatchers.IO) { db.projects }
+                if (dbProjects.isNotEmpty()) {
+                    setSelectedProject(dbProjects[0].id)
+                }
+            }
+        }
+
+        onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                finish()
+            }
+        })
+
+        val projectToSelect = intent.getLongExtra(MainConstants.PARAM_PROJECT_TO_SELECT, 0)
+        if (projectToSelect != 0L) {
+            setSelectedProject(projectToSelect)
+            lifecycleScope.launch {
+                val project = withContext(Dispatchers.IO) { db.getProject(projectToSelect) }
+                val dialogContent = intent.getStringExtra(MainConstants.PARAM_DIALOG_CONTENT)
+                if (dialogContent != null && project != null) {
+                    viewModel.showDialog(
+                        title = getString(R.string.activity_dialog_title, project.name),
+                        message = dialogContent,
+                        positiveText = getString(android.R.string.ok),
+                        icon = Icons.Default.Sync
+                    )
+                }
+            }
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+        val preferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+        val selectedProjectId = preferences.getLong("selected_project", 0)
+        if (selectedProjectId != 0L) {
+            refreshLists()
+        }
+        viewModel.isRefreshing = false
+
+        if (db.cowspentServerSyncHelper.isSyncPossible) {
+            db.cowspentServerSyncHelper.addCallbackPull(syncCallBack)
+            synchronize()
+        }
+
+        registerBroadcastReceiver()
+        updateAvatarInDrawer(CowspentServerSyncHelper.isNextcloudAccountConfigured(this))
+        isActivityVisible = true
+    }
+
+    override fun onPause() {
+        super.onPause()
+        try {
+            unregisterReceiver(mBroadcastReceiver)
+        } catch (_: RuntimeException) {
+            if (DEBUG) Log.d(TAG, "RECEIVER PROBLEM, let's ignore it...")
+        }
+        isActivityVisible = false
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        outState.putSerializable(SAVED_STATE_NAVIGATION_SELECTION, navigationSelection)
+        outState.putString(SAVED_STATE_NAVIGATION_OPEN, navigationOpen)
+    }
+
+    private fun setupDrawerProjects() {
+        val selectedProjectId = PreferenceManager.getDefaultSharedPreferences(applicationContext).getLong("selected_project", 0)
+        lifecycleScope.launch {
+            val projects = withContext(Dispatchers.IO) { db.projects }
+            viewModel.projects = projects
+            setSelectedProject(selectedProjectId)
+        }
+    }
+
+    fun onProjectClick(projectId: Long) {
+        if (viewModel.selectedProjectId != projectId) {
+            viewModel.selectedMemberId = null
+        }
+        setSelectedProject(projectId)
+        navigationSelection = Category(null, null)
+        refreshLists(true)
+
+        synchronize()
+    }
+
+    fun onManageProjectClick(projectId: Long) {
+        viewModel.showProjectOptionsDialogByProjectId = projectId
+    }
+
+    private fun onEditProjectClick(projectId: Long) {
+        if (projectId == 0L) return
+        lifecycleScope.launch {
+            val proj = withContext(Dispatchers.IO) { db.getProject(projectId) }
+            if (proj?.isLocal == false) {
+                val intent = Intent(applicationContext, EditProjectActivity::class.java).apply {
+                    putExtra(EditProjectActivity.PARAM_PROJECT_ID, projectId)
+                }
+                editProjectLauncher.launch(intent)
+            } else {
+                showToast(this@BillsListViewActivity, getString(R.string.edit_project_local_impossible))
+            }
+        }
+    }
+
+    private fun onRemoveProjectClick(projectId: Long) {
+        if (projectId == 0L) return
+        lifecycleScope.launch {
+            val proj = withContext(Dispatchers.IO) { db.getProject(projectId) } ?: return@launch
+            
+            viewModel.showDialog(
+                title = getString(R.string.confirm_remove_project_dialog_title),
+                message = if (!proj.isLocal) getString(R.string.confirm_remove_project_dialog_message) else null,
+                positiveText = getString(R.string.simple_yes),
+                onConfirm = {
+                    lifecycleScope.launch {
+                        withContext(Dispatchers.IO) {
+                            db.deleteProject(projectId)
+                            val dbProjects = db.projects
+                            if (dbProjects.isNotEmpty()) setSelectedProject(dbProjects[0].id) else setSelectedProject(0)
+                        }
+                        setupDrawerProjects()
+                        refreshLists()
+                        synchronize()
+                        val projectNameString = proj.name.ifEmpty { proj.remoteId }
+                        showToast(this@BillsListViewActivity, getString(R.string.remove_project_confirmation, projectNameString))
+                    }
+                },
+                negativeText = getString(R.string.simple_no)
+            )
+        }
+    }
+
+    fun onManageMembersClick(projectId: Long) {
+        if (projectId == 0L) return
+        lifecycleScope.launch {
+            val project = withContext(Dispatchers.IO) { db.getProject(projectId) } ?: return@launch
+            if (project.myAccessLevel != DBProject.ACCESS_LEVEL_UNKNOWN && project.myAccessLevel < DBProject.ACCESS_LEVEL_MAINTAINER) {
+                showToast(this@BillsListViewActivity, getString(R.string.insufficient_access_level))
+                return@launch
+            }
+
+            viewModel.showMemberManagementDialogByProjectId = projectId
+        }
+    }
+
+    fun onManageCurrenciesClick(projectId: Long) {
+        lifecycleScope.launch {
+            val proj = withContext(Dispatchers.IO) { db.getProject(projectId) }
+            if (proj != null && proj.type == ProjectType.COSPEND) {
+                startActivity(Intent(applicationContext, ManageCurrenciesActivity::class.java).apply {
+                    putExtra(ManageCurrenciesActivity.EXTRA_PROJECT_ID, projectId)
+                })
+            } else showToast(this@BillsListViewActivity, getString(R.string.currency_management_unavailable))
+        }
+    }
+
+    fun onProjectStatisticsClick(projectId: Long) {
+        viewModel.showStatisticsDialogByProjectId = projectId
+    }
+
+    fun onSettleProjectClick(projectId: Long) {
+        viewModel.showSettlementDialogByProjectId = projectId
+    }
+
+    fun onShareProjectClick(projectId: Long) {
+        lifecycleScope.launch {
+            val proj = withContext(Dispatchers.IO) { db.getProject(projectId) }
+            if (projectId != 0L && proj?.isShareable() == true) viewModel.showShareDialogByProjectId = projectId
+            else showToast(this@BillsListViewActivity, getString(R.string.share_impossible), Toast.LENGTH_LONG)
+        }
+    }
+
+    fun onExportProjectClick(projectId: Long) {
+        if (projectId == 0L) return
+        lifecycleScope.launch {
+            contentToExport = withContext(Dispatchers.IO) { ExportUtil.createExportContent(db, projectId) }
+            val fileName = withContext(Dispatchers.IO) { ExportUtil.createExportFileName(db, projectId) }
+            val intent = Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
+                addCategory(Intent.CATEGORY_OPENABLE)
+                type = "text/csv"
+                putExtra(Intent.EXTRA_TITLE, fileName)
+            }
+            saveFileLauncher.launch(intent)
+        }
+    }
+
+    private fun saveToFileUri(content: String, fileUri: Uri) {
+        try {
+            contentResolver.openOutputStream(fileUri)?.use { outputStream ->
+                outputStream.writer().use { it.write(content) }
+            }
+            showToast(this,getString(R.string.file_saved_success, fileUri.lastPathSegment?.replace(Environment.getExternalStorageDirectory().toString(), "")))
+        } catch (e: IOException) {
+            Log.e("Exception", "File write failed: $e")
+            showToast(this,e.toString())
+        }
+    }
+
+    private fun addProject() {
+        lifecycleScope.launch {
+            var defaultNcUrl = if (CowspentServerSyncHelper.isNextcloudAccountConfigured(this@BillsListViewActivity)) {
+                CowspentServerSyncHelper.getNextcloudAccountServerUrl(this@BillsListViewActivity)
+            } else "https://mynextcloud.org"
+
+            val dbProjects = withContext(Dispatchers.IO) { db.projects }
+            for (project in dbProjects) {
+                val url = project.serverUrl
+                if (!url.isNullOrEmpty() && url.contains("/index.php/apps/cospend")) {
+                    defaultNcUrl = url.replace("/index.php/apps/cospend", "")
+                    break
+                }
+            }
+            val intent = Intent(applicationContext, NewProjectActivity::class.java).apply {
+                putExtra(NewProjectActivity.PARAM_DEFAULT_NC_URL, defaultNcUrl)
+            }
+            addProjectLauncher.launch(intent)
+        }
+    }
+
+    private fun setSelectedProject(projectId: Long) {
+        val preferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+        preferences.edit { putLong("selected_project", projectId) }
+
+        lifecycleScope.launch {
+            val (proj, members, memberBalances) = withContext(Dispatchers.IO) {
+                var proj = db.getProject(projectId)
+                if (proj == null) {
+                    val dbProjects = db.projects
+                    if (dbProjects.isNotEmpty()) {
+                        proj = dbProjects[0]
+                        preferences.edit { putLong("selected_project", proj.id) }
+                    } else {
+                        return@withContext Triple(null, emptyList(), emptyMap<Long, Double>())
+                    }
+                }
+
+                val members = db.getMembersOfProject(proj.id, null)
+                val bills = db.getBillsOfProject(proj.id)
+                val balances = HashMap<Long, Double>()
+                SupportUtil.getStats(
+                    members, bills,
+                    mutableMapOf(), balances, mutableMapOf(), mutableMapOf(),
+                    -1000, -1000, null, null
+                )
+                Triple(proj, members, balances)
+            }
+
+            if (proj == null) {
+                viewModel.selectedProjectId = 0L
+                return@launch
+            }
+
+            if (viewModel.selectedProjectId != proj.id) {
+                viewModel.selectedMemberId = null
+            }
+            viewModel.selectedProjectId = proj.id
+            viewModel.members = members
+            viewModel.memberBalances = memberBalances
+
+            updateLastSyncText(proj)
+        }
+    }
+
+    private fun updateLastSyncText(proj: DBProject?) {
+        if (proj == null || proj.isLocal) {
+            viewModel.lastSyncText = ""
+        } else {
+            val lastSyncTimestamp = proj.lastSyncedTimestamp ?: 0
+            val cal = Calendar.getInstance().apply { timeInMillis = lastSyncTimestamp * 1000 }
+            val text = getString(R.string.drawer_last_sync_text, cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE))
+            viewModel.lastSyncText = text
+        }
+    }
+
+    fun refreshLists() = refreshLists(false)
+
+    override fun refreshLists(scrollToTop: Boolean) {
+        val selectedProjectId = PreferenceManager.getDefaultSharedPreferences(applicationContext).getLong("selected_project", 0)
+        
+        lifecycleScope.launch {
+            val (projId, projName) = withContext(Dispatchers.IO) {
+                if (selectedProjectId != 0L) {
+                    db.getProject(selectedProjectId)?.let {
+                        it.id to (if (it.name == "null" || it.name.isEmpty()) it.remoteId else it.name)
+                    } ?: (0L to "")
+                } else {
+                    0L to ""
+                }
+            }
+            
+            val title = if (selectedProjectId != 0L) projName else getString(R.string.app_name)
+            
+            setSelectedProject(selectedProjectId)
+            viewModel.title = title
+            val query = viewModel.searchQuery.ifEmpty { null }
+
+            val (ljItems, memberCount) = withContext(Dispatchers.IO) {
+                val db = CowspentSQLiteOpenHelper.getInstance(applicationContext)
+                val billList: List<DBBill> = if (projId != 0L) {
+                    db.searchBills(query, projId)
+                } else {
+                    ArrayList()
+                }
+
+                val bills = billList.filter {
+                    val mid = viewModel.selectedMemberId
+                    mid == null || mid == it.payerId || it.billOwersIds.contains(mid)
+                }
+
+                viewModel.hasUnlabeledBills = bills.any { it.categoryRemoteId == 0 && it.state != DBBill.STATE_DELETED }
+
+                val projectMembers = db.getMembersOfProject(projId, null)
+                val memberMap = projectMembers.associateBy { it.id }
+
+                val projectPaymentModes = db.getPaymentModes(projId).associateBy { it.remoteId }
+                val projectCategories = db.getCategories(projId).associateBy { it.remoteId }
+
+                BillFormatter.formatBills(
+                    bills,
+                    memberMap,
+                    projectCategories,
+                    projectPaymentModes
+                )
+
+                val sdf = SimpleDateFormat("yyyy-MM-dd", Locale.ROOT)
+                val itemList = BillsListUtils.groupAndSectionBills(
+                    bills,
+                    memberMap,
+                    sdf,
+                    applicationContext
+                )
+
+                itemList to projectMembers.size
+            }
+
+            viewModel.showNoProjects = false
+            viewModel.showNoMembers = false
+            viewModel.showNoBills = false
+            
+            when {
+                memberCount == 0 -> {
+                    viewModel.showNoMembers = true
+                }
+                ljItems.isEmpty() -> {
+                    viewModel.showNoBills = true
+                    viewModel.bills = emptyList()
+                }
+                else -> {
+                    viewModel.bills = ljItems
+                }
+            }
+        }
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        if (Intent.ACTION_SEARCH == intent.action) {
+            viewModel.searchQuery = intent.getStringExtra(SearchManager.QUERY) ?: ""
+        }
+        super.onNewIntent(intent)
+    }
+
+    private fun duplicateBill(billId: Long) {
+        val selectedProjectId = PreferenceManager.getDefaultSharedPreferences(applicationContext).getLong("selected_project", 0)
+        if (selectedProjectId != 0L) {
+            lifecycleScope.launch {
+                val members = withContext(Dispatchers.IO) { db.getActivatedMembersOfProject(selectedProjectId) }
+                if (members.isEmpty()) {
+                    showToast(this@BillsListViewActivity, getString(R.string.add_bill_impossible_no_member))
+                } else {
+                    val projType = withContext(Dispatchers.IO) { db.getProject(selectedProjectId)?.type?.id }
+                    val intent = Intent(applicationContext, EditBillActivity::class.java).apply {
+                        putExtra(EditBillActivity.PARAM_PROJECT_ID, selectedProjectId)
+                        putExtra(EditBillActivity.PARAM_PROJECT_TYPE, projType)
+                        putExtra(EditBillActivity.PARAM_BILL_ID_TO_DUPLICATE, billId)
+                    }
+                    createBillLauncher.launch(intent)
+                }
+            }
+        }
+    }
+
+    private fun showDialog(msg: String, title: String, icon: ImageVector) {
+        viewModel.showDialog(
+            title = title,
+            message = msg,
+            positiveText = getString(android.R.string.ok),
+            icon = icon
+        )
+    }
+
+    private fun updateUsernameInDrawer() {
+        if (!CowspentServerSyncHelper.isNextcloudAccountConfigured(this)) {
+            val text = getString(R.string.drawer_no_account)
+            viewModel.accountName = text
+            updateAvatarInDrawer(false)
+        } else {
+            val preferences = PreferenceManager.getDefaultSharedPreferences(this)
+            val (user, server) = if (preferences.getBoolean(AccountActivity.SETTINGS_USE_SSO, false)) {
+                try {
+                    val ssoAccount = SingleAccountHelper.getCurrentSingleSignOnAccount(this)
+                    ssoAccount.userId to ssoAccount.url.replace(Regex("/+$"), "").replace(Regex("^https?://"), "")
+                } catch (_: Exception) { "error" to "error" }
+            } else {
+                preferences.getString(AccountActivity.SETTINGS_USERNAME, "") to preferences.getString(
+                    AccountActivity.SETTINGS_URL, "")?.replace(Regex("/+$"), "")?.replace(Regex("^https?://"), "")
+            }
+            val text = "$user@$server"
+            viewModel.accountName = text
+            updateAvatarInDrawer(true)
+        }
+    }
+
+    private fun updateAvatarInDrawer(isConfigured: Boolean) {
+        if (isConfigured) {
+            val avatarB64 = PreferenceManager.getDefaultSharedPreferences(this).getString(getString(R.string.pref_key_avatar), "")
+            if (!avatarB64.isNullOrEmpty()) {
+                try {
+                    val bytes = Base64.decode(avatarB64, Base64.DEFAULT)
+                    viewModel.userAvatar = BitmapFactory.decodeByteArray(bytes, 0, bytes.size)
+                } catch (_: Exception) {
+                    viewModel.userAvatar = null
+                }
+            } else {
+                viewModel.userAvatar = null
+            }
+        } else {
+            viewModel.userAvatar = null
+        }
+    }
+
+    private fun synchronize(manual: Boolean = false) {
+        val preferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+        val offlineMode = preferences.getBoolean(getString(R.string.pref_key_offline_mode), false)
+        if (offlineMode && !manual) {
+            return
+        }
+
+        if (db.cowspentServerSyncHelper.isSyncPossible) {
+            viewModel.isRefreshing = true
+            val selectedProjectId = PreferenceManager.getDefaultSharedPreferences(applicationContext).getLong("selected_project", 0)
+            if (selectedProjectId != 0L) {
+                lifecycleScope.launch {
+                    val proj = withContext(Dispatchers.IO) { db.getProject(selectedProjectId) }
+                    if (proj != null && !proj.isLocal) {
+                        db.cowspentServerSyncHelper.addCallbackPull(syncCallBack)
+                        db.cowspentServerSyncHelper.scheduleSync(false, selectedProjectId)
+                    } else viewModel.isRefreshing = false
+                }
+            } else viewModel.isRefreshing = false
+            if (CowspentServerSyncHelper.isNextcloudAccountConfigured(applicationContext)) {
+                db.cowspentServerSyncHelper.runAccountProjectsSync()
+            }
+        }
+    }
+
+    private fun registerBroadcastReceiver() {
+        val filter = IntentFilter().apply {
+            addAction(MainConstants.BROADCAST_PROJECT_SYNC_FAILED)
+            addAction(MainConstants.BROADCAST_PROJECT_SYNCED)
+            addAction(MainConstants.BROADCAST_SYNC_PROJECT)
+            addAction(MainConstants.BROADCAST_NETWORK_AVAILABLE)
+            addAction(MainConstants.BROADCAST_NETWORK_UNAVAILABLE)
+            addAction(MainConstants.BROADCAST_AVATAR_UPDATED)
+            addAction(MainConstants.BROADCAST_SSO_TOKEN_MISMATCH)
+            addAction(MainConstants.BROADCAST_ACCOUNT_PROJECTS_SYNC_FAILED)
+            addAction(MainConstants.BROADCAST_ACCOUNT_PROJECTS_SYNCED)
+        }
+        ContextCompat.registerReceiver(this, mBroadcastReceiver, filter, ContextCompat.RECEIVER_EXPORTED)
+    }
+
+    private val mBroadcastReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context, intent: Intent?) {
+            if (intent?.action == null) return
+            when (intent.action) {
+                MainConstants.BROADCAST_PROJECT_SYNC_FAILED -> {
+                    val errorMessage = intent.getStringExtra(MainConstants.BROADCAST_ERROR_MESSAGE)
+                    val projectId = intent.getLongExtra(MainConstants.BROADCAST_PROJECT_ID, 0)
+                    if (projectId != 0L) {
+                        lifecycleScope.launch {
+                            val project = withContext(Dispatchers.IO) { db.getProject(projectId) } ?: return@launch
+                            viewModel.showDialog(
+                                title = getString(R.string.sync_error_dialog_title),
+                                message = getString(R.string.sync_error_dialog_full_content, project.name, errorMessage),
+                                positiveText = getString(R.string.simple_close),
+                                icon = Icons.Default.Sync
+                            )
+                        }
+                    }
+                }
+                MainConstants.BROADCAST_PROJECT_SYNCED -> {
+                    setupDrawerProjects()
+                    refreshLists()
+                }
+                MainConstants.BROADCAST_SYNC_PROJECT -> {
+                    synchronize()
+                }
+                MainConstants.BROADCAST_NETWORK_AVAILABLE -> {
+                }
+                MainConstants.BROADCAST_NETWORK_UNAVAILABLE -> {
+                }
+                MainConstants.BROADCAST_SSO_TOKEN_MISMATCH -> {
+                    viewModel.showDialog(
+                        title = getString(R.string.sync_error_dialog_title),
+                        message = getString(R.string.error_token_mismatch),
+                        positiveText = getString(R.string.simple_close),
+                        icon = Icons.Default.Sync
+                    )
+                }
+                MainConstants.BROADCAST_AVATAR_UPDATED -> {
+                    val memberId = intent.getLongExtra(MainConstants.BROADCAST_AVATAR_UPDATED_MEMBER, 0)
+                    if (memberId == 0L) updateAvatarInDrawer(true) else refreshLists()
+                }
+                MainConstants.BROADCAST_ACCOUNT_PROJECTS_SYNCED -> {
+                    setupDrawerProjects()
+                    val prefs = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+                    lifecycleScope.launch {
+                        val dbProjects = withContext(Dispatchers.IO) { db.projects }
+                        if (prefs.getLong("selected_project", 0) == 0L && dbProjects.isNotEmpty()) {
+                            setSelectedProject(dbProjects[0].id)
+                            refreshLists()
+                            if (db.cowspentServerSyncHelper.isSyncPossible) {
+                                db.cowspentServerSyncHelper.addCallbackPull(syncCallBack)
+                                synchronize()
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/main/BillsListViewModel.kt

@@ -0,0 +1,77 @@
+package net.helcel.cowspent.android.main
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableLongStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import net.helcel.cowspent.model.DBProject
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.model.Item
+import net.helcel.cowspent.android.helper.DialogState
+
+import androidx.compose.ui.graphics.vector.ImageVector
+
+class BillsListViewModel : ViewModel() {
+    var projects by mutableStateOf<List<DBProject>>(emptyList())
+    var members by mutableStateOf<List<DBMember>>(emptyList())
+    var memberBalances by mutableStateOf<Map<Long, Double>>(emptyMap())
+    var selectedProjectId by mutableLongStateOf(0L)
+    var selectedMemberId by mutableStateOf<Long?>(null)
+    var bills by mutableStateOf<List<Item>>(emptyList())
+    var isRefreshing by mutableStateOf(false)
+    var searchQuery by mutableStateOf("")
+    var title by mutableStateOf("")
+    var accountName by mutableStateOf("")
+    var userAvatar by mutableStateOf<android.graphics.Bitmap?>(null)
+    var lastSyncText by mutableStateOf("")
+    
+    var showNoProjects by mutableStateOf(false)
+    var showNoMembers by mutableStateOf(false)
+    var showNoBills by mutableStateOf(false)
+    var hasUnlabeledBills by mutableStateOf(false)
+
+    var dialogState by mutableStateOf<DialogState?>(null)
+
+    var showProjectOptionsDialogByProjectId by mutableStateOf<Long?>(null)
+    var showSettlementDialogByProjectId by mutableStateOf<Long?>(null)
+    var showStatisticsDialogByProjectId by mutableStateOf<Long?>(null)
+    var showMemberManagementDialogByProjectId by mutableStateOf<Long?>(null)
+    var showAddMemberDialogByProjectId by mutableStateOf<Long?>(null)
+    var showEditMemberDialogByProjectId by mutableStateOf<Long?>(null)
+    var showShareDialogByProjectId by mutableStateOf<Long?>(null)
+
+    fun showDialog(
+        title: String? = null,
+        message: String? = null,
+        icon: ImageVector? = null,
+        items: List<CharSequence>? = null,
+        itemIcons: List<ImageVector>? = null,
+        positiveText: String? = null,
+        negativeText: String? = null,
+        neutralText: String? = null,
+        onConfirm: (() -> Unit)? = null,
+        onCancel: (() -> Unit)? = null,
+        onNeutral: (() -> Unit)? = null,
+        onItemSelected: ((Int) -> Unit)? = null
+    ) {
+        dialogState = DialogState(
+            title = title,
+            message = message,
+            icon = icon,
+            items = items,
+            itemIcons = itemIcons,
+            positiveText = positiveText,
+            negativeText = negativeText,
+            neutralText = neutralText,
+            onConfirm = onConfirm,
+            onCancel = onCancel,
+            onNeutral = onNeutral,
+            onItemSelected = onItemSelected
+        )
+    }
+
+    fun dismissDialog() {
+        dialogState = null
+    }
+}

app/src/main/java/net/helcel/cowspent/android/main/MainConstants.kt

@@ -0,0 +1,36 @@
+package net.helcel.cowspent.android.main
+
+@Suppress("unused")
+object MainConstants {
+    const val BROADCAST_EXTRA_PARAM = "net.helcel.cowspent.broadcast_extra_param"
+    const val BROADCAST_ERROR_MESSAGE = "net.helcel.cowspent.broadcast_error_message"
+    const val BROADCAST_PROJECT_ID = "net.helcel.cowspent.broadcast_project_id"
+    const val BROADCAST_ACCOUNT_PROJECTS_SYNC_FAILED = "net.helcel.cowspent.broadcast_acc_proj_failed"
+    const val BROADCAST_SSO_TOKEN_MISMATCH = "net.helcel.cowspent.broadcast.token_mismatch"
+    const val BROADCAST_ACCOUNT_PROJECTS_SYNCED = "net.helcel.cowspent.broadcast.broadcast_acc_proj_synced"
+
+    const val BROADCAST_PROJECT_SYNC_FAILED = "net.helcel.cowspent.broadcast.project_sync_failed"
+    const val BROADCAST_PROJECT_SYNCED = "net.helcel.cowspent.broadcast.project_synced"
+    const val BROADCAST_SYNC_PROJECT = "net.helcel.cowspent.broadcast.sync_project"
+    const val BROADCAST_NETWORK_AVAILABLE = "net.helcel.cowspent.broadcast.network_available"
+    const val BROADCAST_NETWORK_UNAVAILABLE = "net.helcel.cowspent.broadcast.network_unavailable"
+    const val BROADCAST_AVATAR_UPDATED = "net.helcel.cowspent.broadcast.avatar_updated"
+    const val BROADCAST_AVATAR_UPDATED_MEMBER = "net.helcel.cowspent.broadcast.avatar_updated_for_member"
+
+    const val MAIN_CHANNEL_ID = 1234567890
+
+    const val PARAM_DIALOG_CONTENT = "net.helcel.cowspent.PARAM_DIALOG_CONTENT"
+    const val PARAM_PROJECT_TO_SELECT = "net.helcel.cowspent.PARAM_PROJECT_TO_SELECT"
+
+    const val SAVED_BILL_ID = "net.helcel.cowspent.saved_bill_id"
+    const val CREATED_PROJECT = "net.helcel.cowspent.created_project"
+    const val ADDED_PROJECT = "net.helcel.cowspent.added_project"
+    const val EDITED_PROJECT = "net.helcel.cowspent.edited_project"
+    const val DELETED_PROJECT = "net.helcel.cowspent.deleted_project"
+    const val DELETED_BILL = "net.helcel.cowspent.deleted_bill"
+    const val BILL_TO_DUPLICATE = "net.helcel.cowspent.bill_to_duplicate"
+
+    const val KEY_QR_CODE = "net.helcel.cowspent.android.helper.key_qr_code"
+
+    const val CREDENTIALS_CHANGED = "net.helcel.cowspent.CREDENTIALS_CHANGED"
+}

app/src/main/java/net/helcel/cowspent/android/project/ProjectImportHelper.kt

@@ -0,0 +1,175 @@
+package net.helcel.cowspent.android.project
+
+import android.annotation.SuppressLint
+import android.content.ContentResolver
+import android.content.Context
+import android.net.Uri
+import android.provider.OpenableColumns
+import android.util.Log
+import com.opencsv.CSVReader
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.*
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import java.io.InputStreamReader
+import java.text.SimpleDateFormat
+import java.util.*
+
+object ProjectImportHelper {
+
+    @SuppressLint("Range")
+    fun getFileName(contentResolver: ContentResolver, uri: Uri): String {
+        var result: String? = null
+        if (uri.scheme == "content") {
+            contentResolver.query(uri, null, null, null, null)?.use { cursor ->
+                if (cursor.moveToFirst()) {
+                    result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME))
+                }
+            }
+        }
+        if (result == null) {
+            result = uri.path?.let { p ->
+                val cut = p.lastIndexOf('/')
+                if (cut != -1) p.substring(cut + 1) else p
+            }
+        }
+        return result ?: "project.csv"
+    }
+
+    fun importFromFile(
+        context: Context,
+        db: CowspentSQLiteOpenHelper,
+        fileUri: Uri,
+        onSuccess: (Long) -> Unit,
+        onError: (String) -> Unit
+    ) {
+        val contentResolver = context.contentResolver
+        try {
+            val projectRemoteId = getFileName(contentResolver, fileUri).replace("\\.csv$".toRegex(), "")
+            val inputStream = contentResolver.openInputStream(fileUri) ?: return
+            val reader = CSVReader(InputStreamReader(inputStream))
+            
+            var previousLineEmpty = false
+            var currentSection: String? = null
+            var row = 0
+            var mainCurrencyName: String? = null
+            val columns = mutableMapOf<String, Int>()
+            val paymentModes = mutableListOf<DBPaymentMode>()
+            val categories = mutableListOf<DBCategory>()
+            val currencies = mutableListOf<DBCurrency>()
+            val bills = mutableListOf<DBBill>()
+            val membersActive = mutableMapOf<String, Boolean>()
+            val membersWeight = mutableMapOf<String, Double>()
+            val billRemoteIdToPayerName = mutableMapOf<Long, String>()
+            val billRemoteIdToOwerStr = mutableMapOf<Long, String>()
+            
+            var nextLine: Array<String>?
+            while (reader.readNext().also { nextLine = it } != null) {
+                val line = nextLine!!
+                val allFieldsEmpty = line.all { it.isEmpty() }
+                
+                if (allFieldsEmpty) {
+                    previousLineEmpty = true
+                } else if (row == 0 || previousLineEmpty) {
+                    previousLineEmpty = false
+                    columns.clear()
+                    line.forEachIndexed { index, s -> columns[s] = index }
+                    
+                    currentSection = when {
+                        columns.containsKey("what") && columns.containsKey("amount") -> "bills"
+                        columns.containsKey("categoryid") && columns.containsKey("categoryname") -> "categories"
+                        columns.containsKey("exchange_rate") && columns.containsKey("currencyname") -> "currencies"
+                        else -> {
+                            onError(context.getString(R.string.import_error_header, row))
+                            return
+                        }
+                    }
+                } else {
+                    previousLineEmpty = false
+                    when (currentSection) {
+                        "categories" -> {
+                            categories.add(DBCategory(0, line[columns["categoryid"]!!].toLong(), 0, line[columns["categoryname"]!!], line[columns["icon"]!!], line[columns["color"]!!]))
+                        }
+                        "paymentmodes" -> {
+                            paymentModes.add(DBPaymentMode(0, line[columns["categoryid"]!!].toLong(), 0, line[columns["categoryname"]!!], line[columns["icon"]!!], line[columns["color"]!!]))
+                        }
+                        "currencies" -> {
+                            val name = line[columns["currencyname"]!!]
+                            val rate = line[columns["exchange_rate"]!!].toDouble()
+                            if (rate == 1.0) mainCurrencyName = name
+                            currencies.add(DBCurrency(0, 0, 0, name, rate, DBBill.STATE_OK))
+                        }
+                        "bills" -> {
+                            val what = if (columns.containsKey("what")) line[columns["what"]!!] else ""
+                            val comment = if (columns.containsKey("comment")) line[columns["comment"]!!] else ""
+                            val amount = if (columns.containsKey("amount")) line[columns["amount"]!!].toDouble() else 0.0
+                            val timestamp: Long = when {
+                                columns.containsKey("timestamp") -> line[columns["timestamp"]!!].toLong()
+                                columns.containsKey("date") -> {
+                                    try {
+                                        SimpleDateFormat("yyyy-MM-dd", Locale.ROOT).parse(line[columns["date"]!!])!!.time / 1000
+                                    } catch (_: Exception) {
+                                        onError(context.getString(R.string.import_error_date, row))
+                                        return
+                                    }
+                                }
+                                else -> 0
+                            }
+                            val payerName = if (columns.containsKey("payer_name")) line[columns["payer_name"]!!] else ""
+                            val payerWeight = if (columns.containsKey("payer_weight")) line[columns["payer_weight"]!!].toDouble() else 1.0
+                            val owersStr = if (columns.containsKey("owers")) line[columns["owers"]!!] else ""
+                            val payerActive = columns.containsKey("payer_active") && line[columns["payer_active"]!!] == "1"
+                            val catId = if (columns.containsKey("categoryid") && line[columns["categoryid"]!!].isNotEmpty()) line[columns["categoryid"]!!].toInt() else 0
+                            val pmId = if (columns.containsKey("paymentmodeid") && line[columns["paymentmodeid"]!!].isNotEmpty()) line[columns["paymentmodeid"]!!].toInt() else 0
+                            val pm = if (columns.containsKey("paymentmode")) line[columns["paymentmode"]!!] else null
+                            
+                            membersActive[payerName] = payerActive
+                            membersWeight[payerName] = payerWeight
+                            
+                            if (owersStr.trim().isEmpty()) {
+                                onError(context.getString(R.string.import_error_owers, row))
+                                return
+                            }
+                            
+                            if (what != "deleteMeIfYouWant") {
+                                billRemoteIdToOwerStr[row.toLong()] = owersStr
+                                val owersArray = owersStr.split(", ").filter { it.isNotEmpty() }
+                                for (ower in owersArray) {
+                                    if (!membersWeight.containsKey(ower.trim())) {
+                                        membersWeight[ower.trim()] = 1.0
+                                    }
+                                }
+                                bills.add(DBBill(0, row.toLong(), 0, 0, amount, timestamp, what, DBBill.STATE_OK, "n", pm, catId, comment, pmId))
+                                billRemoteIdToPayerName[row.toLong()] = payerName
+                            }
+                        }
+                    }
+                }
+                row++
+            }
+            
+            val memberNameToId = mutableMapOf<String, Long>()
+            val pid = db.addProject(DBProject(0, projectRemoteId, "", projectRemoteId, null, null, null, ProjectType.LOCAL, 0L, mainCurrencyName, false, DBProject.ACCESS_LEVEL_UNKNOWN, null))
+            
+            paymentModes.forEach { db.addPaymentMode(DBPaymentMode(0, it.remoteId, pid, it.name, it.icon, it.color)) }
+            categories.forEach { db.addCategory(DBCategory(0, it.remoteId, pid, it.name, it.icon, it.color)) }
+            currencies.forEach { db.addCurrency(DBCurrency(0, 0, pid, it.name, it.exchangeRate, DBBill.STATE_OK)) }
+            
+            membersWeight.keys.forEach { mName ->
+                memberNameToId[mName] = db.addMember(DBMember(0, 0, pid, mName, membersActive[mName] ?: true, membersWeight[mName] ?: 1.0, DBBill.STATE_OK, null, null, null, null, null))
+            }
+            
+            bills.forEach { b ->
+                val payerId = memberNameToId[billRemoteIdToPayerName[b.remoteId]] ?: 0L
+                val billId = db.addBill(DBBill(0, 0, pid, payerId, b.amount, b.timestamp, b.what, DBBill.STATE_OK, b.repeat, b.paymentMode, b.categoryRemoteId, b.comment, b.paymentModeRemoteId))
+                billRemoteIdToOwerStr[b.remoteId]?.split(", ")?.filter { it.isNotEmpty() }?.forEach { ower ->
+                    memberNameToId[ower.trim()]?.let { owerId -> db.addBillower(billId, owerId) }
+                }
+            }
+            onSuccess(pid)
+            
+        } catch (e: Exception) {
+            Log.e("Import", "Error importing", e)
+            onError("Import failed: ${e.message}")
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/ProjectOptionsDialog.kt

@@ -0,0 +1,156 @@
+package net.helcel.cowspent.android.project
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import net.helcel.cowspent.R
+
+import net.helcel.cowspent.model.DBProject
+
+@Composable
+fun ProjectOptionsDialogContent(
+    onEditProject: () -> Unit,
+    onRemoveProject: () -> Unit,
+    onManageMembers: () -> Unit,
+    onManageCurrencies: () -> Unit,
+    onStatistics: () -> Unit,
+    onSettle: () -> Unit,
+    onShareProject: () -> Unit,
+    onExportProject: () -> Unit,
+    onDismiss: () -> Unit,
+    isArchived: Boolean = false,
+    accessLevel: Int = DBProject.ACCESS_LEVEL_ADMIN,
+    isShareable: Boolean = true
+) {
+    Surface(
+        shape = MaterialTheme.shapes.large,
+        color = MaterialTheme.colors.surface,
+        contentColor = contentColorFor(MaterialTheme.colors.surface)
+    ) {
+        Column(
+            modifier = Modifier
+                .padding(16.dp)
+                .fillMaxWidth()
+        ) {
+            Text(
+                text = stringResource(R.string.choose_project_management_action),
+                style = MaterialTheme.typography.h6,
+                modifier = Modifier.padding(bottom = 8.dp)
+            )
+
+            val options = mutableListOf<ProjectOption>()
+            val isMaintainer = accessLevel >= DBProject.ACCESS_LEVEL_MAINTAINER || accessLevel == DBProject.ACCESS_LEVEL_UNKNOWN
+            val isParticipant = accessLevel >= DBProject.ACCESS_LEVEL_PARTICIPANT || accessLevel == DBProject.ACCESS_LEVEL_UNKNOWN
+
+            if (!isArchived && isMaintainer) {
+                options.add(ProjectOption(stringResource(R.string.action_edit_project), Icons.Default.Edit, onEditProject))
+            }
+            options.add(ProjectOption(stringResource(R.string.fab_rm_project), Icons.Default.Delete, onRemoveProject))
+            if (!isArchived && isMaintainer) {
+                options.add(ProjectOption(stringResource(R.string.fab_manage_members), Icons.Default.Group, onManageMembers))
+                options.add(ProjectOption(stringResource(R.string.fab_manage_currencies), Icons.Default.MonetizationOn, onManageCurrencies))
+            }
+            options.add(ProjectOption(stringResource(R.string.fab_statistics), Icons.Default.BarChart, onStatistics))
+            if (!isArchived && isParticipant) {
+                options.add(ProjectOption(stringResource(R.string.fab_settle), Icons.Default.Handshake, onSettle))
+            }
+            if (isShareable && isParticipant) {
+                options.add(ProjectOption(stringResource(R.string.action_share_project), Icons.Default.Share, onShareProject))
+            }
+            options.add(ProjectOption(stringResource(R.string.fab_export_project), Icons.Default.Download, onExportProject))
+
+            // Simple 2-column grid using Rows
+            for (i in options.indices step 2) {
+                Row(modifier = Modifier.fillMaxWidth()) {
+                    ProjectOptionItem(
+                        option = options[i],
+                        modifier = Modifier.weight(1f)
+                    )
+                    if (i + 1 < options.size) {
+                        ProjectOptionItem(
+                            option = options[i + 1],
+                            modifier = Modifier.weight(1f)
+                        )
+                    } else {
+                        Spacer(modifier = Modifier.weight(1f))
+                    }
+                }
+            }
+
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.End
+            ) {
+                TextButton(onClick = onDismiss) {
+                    Text(stringResource(android.R.string.cancel))
+                }
+            }
+        }
+    }
+}
+
+data class ProjectOption(
+    val title: String,
+    val icon: ImageVector,
+    val onClick: () -> Unit
+)
+
+@Composable
+fun ProjectOptionItem(
+    option: ProjectOption,
+    modifier: Modifier = Modifier
+) {
+    Column(
+        modifier = modifier
+            .clickable { option.onClick() }
+            .padding(8.dp),
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Icon(
+            imageVector = option.icon,
+            contentDescription = null,
+            modifier = Modifier.size(32.dp),
+            tint = MaterialTheme.colors.primary
+        )
+        Spacer(modifier = Modifier.height(4.dp))
+        Text(
+            text = option.title,
+            style = MaterialTheme.typography.caption,
+            textAlign = TextAlign.Center,
+            maxLines = 2,
+            lineHeight = 14.sp
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun ProjectOptionsDialogPreview() {
+    MaterialTheme {
+        ProjectOptionsDialogContent(
+            onEditProject = {},
+            onRemoveProject = {},
+            onManageMembers = {},
+            onManageCurrencies = {},
+            onStatistics = {},
+            onSettle = {},
+            onShareProject = {},
+            onExportProject = {},
+            onDismiss = {},
+            isArchived = false,
+            accessLevel = DBProject.ACCESS_LEVEL_ADMIN,
+            isShareable = true
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/ProjectShareDialog.kt

@@ -0,0 +1,316 @@
+package net.helcel.cowspent.android.project
+
+import android.content.Intent
+import android.graphics.Bitmap
+import android.widget.Toast
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.Button
+import androidx.compose.material.ContentAlpha
+import androidx.compose.material.Icon
+import androidx.compose.material.IconButton
+import androidx.compose.material.LocalContentAlpha
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.OutlinedButton
+import androidx.compose.material.Surface
+import androidx.compose.material.Text
+import androidx.compose.material.contentColorFor
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ContentCopy
+import androidx.compose.material.icons.filled.Link
+import androidx.compose.material.icons.filled.QrCode
+import androidx.compose.material.icons.filled.Share
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.colorResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.AnnotatedString
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.core.net.toUri
+import com.google.zxing.WriterException
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.DBProject
+import net.helcel.cowspent.model.ProjectType
+import net.helcel.cowspent.util.ColorUtils
+
+@Composable
+fun ProjectShareDialogContent(
+    proj: DBProject,
+    onShare: (String) -> Unit,
+    onDismiss: () -> Unit
+) {
+    val context = LocalContext.current
+    val clipboardManager = LocalClipboardManager.current
+    val qrCodeLinkWarn = stringResource(R.string.qrcode_link_open_attempt_warning)
+    
+    val shareUrl = remember { proj.getShareUrl() }
+    val publicWebUrl = remember { proj.getPublicWebUrl() }
+
+    val qrBitmap = remember(shareUrl) {
+        try {
+            ColorUtils.encodeAsBitmap(shareUrl)
+        } catch (_: WriterException) {
+            null
+        }
+    }
+
+    Surface(
+        shape = MaterialTheme.shapes.large,
+        color = MaterialTheme.colors.surface,
+        contentColor = contentColorFor(MaterialTheme.colors.surface)
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .heightIn(max = 650.dp)
+                .padding(16.dp)
+        ) {
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier.padding(bottom =  8.dp)
+            ) {
+                Icon(
+                    Icons.Default.Share,
+                    contentDescription = null,
+                    tint = MaterialTheme.colors.primary,
+                    modifier = Modifier.size(24.dp)
+                )
+                Spacer(modifier = Modifier.width(12.dp))
+                Text(
+                    text = stringResource(R.string.share_dialog_title),
+                    style = MaterialTheme.typography.h6,
+                    fontWeight = FontWeight.Bold
+                )
+            }
+
+            Column(
+                modifier = Modifier
+                    .weight(1f, fill = false)
+                    .verticalScroll(rememberScrollState()),
+                verticalArrangement = Arrangement.spacedBy(16.dp)
+            ) {
+                ShareCard(
+                    title = stringResource(R.string.share_project_public_url_title),
+                    url = publicWebUrl,
+                    description = stringResource(R.string.share_project_public_url_dialog_message),
+                    icon = Icons.Default.Link,
+                    onUrlClick = {
+                        val i = Intent(Intent.ACTION_VIEW).apply {
+                            data = publicWebUrl.toUri()
+                        }
+                        context.startActivity(i)
+                    },
+                    onCopyClick = {
+                        clipboardManager.setText(AnnotatedString(publicWebUrl))
+                        Toast.makeText(context, "Link copied to clipboard", Toast.LENGTH_SHORT).show()
+                    }
+                )
+
+                ShareCard(
+                    title = stringResource(R.string.share_project_public_qrcode_title),
+                    url = shareUrl,
+                    description = stringResource(R.string.share_project_dialog_message),
+                    icon = Icons.Default.QrCode,
+                    qrBitmap = qrBitmap,
+                    onUrlClick = {
+                        Toast.makeText(context, qrCodeLinkWarn, Toast.LENGTH_SHORT).show()
+                    },
+                    onCopyClick = {
+                        clipboardManager.setText(AnnotatedString(shareUrl))
+                        Toast.makeText(context, "Link copied to clipboard", Toast.LENGTH_SHORT).show()
+                    }
+                )
+            }
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            DialogActions(
+                onShare = { onShare(shareUrl) },
+                onDismiss = onDismiss
+            )
+        }
+    }
+}
+
+@Composable
+private fun ShareCard(
+    title: String,
+    url: String,
+    description: String,
+    icon: ImageVector,
+    onUrlClick: () -> Unit,
+    onCopyClick: () -> Unit,
+    qrBitmap: Bitmap? = null
+) {
+    Surface(
+        shape = MaterialTheme.shapes.medium,
+        color = colorResource(R.color.fg_default_low).copy(alpha = 0.04f),
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        Column(
+            modifier = Modifier.padding(8.dp),
+            horizontalAlignment = Alignment.CenterHorizontally
+        ) {
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Icon(
+                    imageVector = icon,
+                    contentDescription = null,
+                    modifier = Modifier.size(18.dp),
+                    tint = MaterialTheme.colors.primary.copy(alpha = 0.7f)
+                )
+                Spacer(modifier = Modifier.width(8.dp))
+                Text(
+                    text = title,
+                    style = MaterialTheme.typography.subtitle2,
+                    fontWeight = FontWeight.Bold,
+                    color = MaterialTheme.colors.onSurface.copy(alpha = 0.8f)
+                )
+            }
+
+            if (qrBitmap != null) {
+                Spacer(modifier = Modifier.height(8.dp))
+                Box(
+                    modifier = Modifier.size(128.dp)
+                        .clip(MaterialTheme.shapes.small)
+                        .background(Color.White),
+                    contentAlignment = Alignment.Center
+                ) {
+                    Image(
+                        bitmap = qrBitmap.asImageBitmap(),
+                        contentDescription = null,
+                        modifier = Modifier.fillMaxWidth()
+                    )
+                }
+            }
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            Surface(
+                shape = MaterialTheme.shapes.small,
+                color = MaterialTheme.colors.surface,
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                Row(
+                    modifier = Modifier
+                        .clickable { onUrlClick() }
+                        .padding(start = 12.dp, end = 4.dp),
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Text(
+                        text = url,
+                        modifier = Modifier.weight(1f),
+                        color = MaterialTheme.colors.primary,
+                        style = MaterialTheme.typography.body2,
+                        maxLines = 1,
+                        overflow = TextOverflow.Ellipsis,
+                        fontWeight = FontWeight.Medium
+                    )
+                    IconButton(onClick = onCopyClick) {
+                        Icon(
+                            Icons.Default.ContentCopy,
+                            contentDescription = "Copy",
+                            modifier = Modifier.size(18.dp),
+                            tint = colorResource(R.color.fg_default_low)
+                        )
+                    }
+                }
+            }
+
+            Spacer(modifier = Modifier.height(12.dp))
+
+            CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.medium) {
+                Text(
+                    text = description,
+                    style = MaterialTheme.typography.caption,
+                    textAlign = TextAlign.Center,
+                    lineHeight = 16.sp,
+                    modifier = Modifier.padding(horizontal = 8.dp)
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun DialogActions(
+    onShare: () -> Unit,
+    onDismiss: () -> Unit
+) {
+    Row(
+        modifier = Modifier.fillMaxWidth(),
+        horizontalArrangement = Arrangement.spacedBy(12.dp, Alignment.End),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        OutlinedButton(
+            onClick = onDismiss,
+            shape = MaterialTheme.shapes.small
+        ) {
+            Text(
+                text = stringResource(R.string.simple_ok).uppercase(),
+                style = MaterialTheme.typography.button,
+                fontWeight = FontWeight.SemiBold
+            )
+        }
+        Button(
+            onClick = onShare,
+            shape = MaterialTheme.shapes.small,
+            elevation = null
+        ) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Icon(Icons.Default.Share, contentDescription = null, modifier = Modifier.size(16.dp))
+                Spacer(modifier = Modifier.width(8.dp))
+                Text(
+                    text = stringResource(R.string.simple_share_share).uppercase(),
+                    style = MaterialTheme.typography.button,
+                    fontWeight = FontWeight.Bold
+                )
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun ProjectShareDialogContentPreview() {
+    MaterialTheme {
+        ProjectShareDialogContent(
+            proj = DBProject(
+                1, "Vacation", "", "vacation", null, null, null,
+                ProjectType.LOCAL, 0L, null, false, 0, null
+            ),
+            onShare = {},
+            onDismiss = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/create/NewProjectActivity.kt

@@ -0,0 +1,347 @@
+package net.helcel.cowspent.android.project.create
+
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.util.Patterns
+import android.widget.Toast
+import androidx.activity.compose.setContent
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
+import androidx.preference.PreferenceManager
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.*
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.theme.ThemeUtils
+import net.helcel.cowspent.util.*
+import androidx.core.net.toUri
+import androidx.core.content.edit
+import net.helcel.cowspent.model.ProjectType
+import net.helcel.cowspent.android.main.MainConstants
+import net.helcel.cowspent.android.helper.QrCodeScannerActivity
+import net.helcel.cowspent.android.project.ProjectImportHelper
+
+class NewProjectActivity : AppCompatActivity() {
+
+    private val viewModel: NewProjectViewModel by viewModels()
+    private lateinit var db: CowspentSQLiteOpenHelper
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        db = CowspentSQLiteOpenHelper.getInstance(this)
+
+        if (savedInstanceState == null) {
+            handleIntent(intent)
+        }
+
+        setContent {
+            ThemeUtils.CowspentTheme {
+                NewProjectScreen(
+                    viewModel = viewModel,
+                    onScanQrCode = {
+                        val createIntent = Intent(this, QrCodeScannerActivity::class.java)
+                        scanQRCodeLauncher.launch(createIntent)
+                    },
+                    onImportFile = {
+                        val intent = Intent()
+                            .setType("*/*")
+                            .setAction(Intent.ACTION_GET_CONTENT)
+                        importFileLauncher.launch(Intent.createChooser(intent, "Select a file"))
+                    },
+                    onChooseFromNextcloud = {
+                        chooseFromNextcloud()
+                    },
+                    onOkPressed = { onPressOk() },
+                    onBack = { finish() }
+                )
+            }
+        }
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        setIntent(intent)
+        handleIntent(intent)
+    }
+
+    private fun handleIntent(intent: Intent) {
+        val defaultTypeId = intent.getStringExtra(PARAM_DEFAULT_PROJECT_TYPE)
+        if (defaultTypeId != null) {
+            viewModel.projectType = ProjectType.getTypeById(defaultTypeId) ?: ProjectType.LOCAL
+        }
+
+        val defaultNcUrl = intent.getStringExtra(PARAM_DEFAULT_NC_URL)
+        if (defaultNcUrl != null) {
+            viewModel.defaultNcUrl = defaultNcUrl
+            if (viewModel.projectType != ProjectType.IHATEMONEY) {
+                viewModel.projectUrl = defaultNcUrl
+            }
+        }
+
+        val defaultProjectId = intent.getStringExtra(PARAM_DEFAULT_PROJECT_ID)
+        if (defaultProjectId != null) {
+            viewModel.projectId = defaultProjectId
+        }
+
+        val defaultPassword = intent.getStringExtra(PARAM_DEFAULT_PROJECT_PASSWORD)
+        if (defaultPassword != null) {
+            viewModel.projectPassword = defaultPassword
+        }
+
+        if (Intent.ACTION_VIEW == intent.action) {
+            val data = intent.data
+            if (data != null) {
+                viewModel.updateFromUri(data)
+                if (viewModel.isFormValid()) {
+                    onPressOk()
+                }
+            }
+        }
+    }
+
+    private val scanQRCodeLauncher =
+        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+            if (result.resultCode == RESULT_OK) {
+                result.data?.getStringExtra(MainConstants.KEY_QR_CODE)?.let { scannedUrl ->
+                    viewModel.updateFromUri(scannedUrl.toUri())
+                    if (viewModel.isFormValid()) {
+                        onPressOk()
+                    }
+                }
+            }
+        }
+
+    private val importFileLauncher =
+        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+            if (result.resultCode == RESULT_OK) {
+                result.data?.data?.let { importFromFile(it) }
+            }
+        }
+
+    private fun chooseFromNextcloud() {
+        lifecycleScope.launch {
+            val accountProjects = withContext(Dispatchers.IO) { db.accountProjects }
+            if (accountProjects.isEmpty()) {
+                showToast(getString(R.string.choose_account_project_dialog_impossible), Toast.LENGTH_LONG)
+                return@launch
+            }
+
+            viewModel.nextcloudProjects = accountProjects
+            viewModel.showNextcloudProjectDialog = true
+        }
+    }
+
+    private fun onPressOk() {
+        val type = viewModel.projectType
+        val todoCreate = viewModel.whatTodoIsCreate
+        val url = getFormattedUrl()
+
+        val fakeProj = DBProject(
+            0, "", "", "", url,
+            "", 0L, type, 0L,
+            null, false, DBProject.ACCESS_LEVEL_UNKNOWN,
+            ""
+        )
+
+        if (isValidUrl(url) && todoCreate && ProjectType.COSPEND == type &&
+            db.cowspentServerSyncHelper.canCreateAuthenticatedProject(fakeProj) &&
+            !viewModel.showAuthWarningDialog // Avoid infinite loop
+        ) {
+            viewModel.showAuthWarningDialog = true
+        } else {
+            createProject()
+        }
+    }
+
+    private fun getFormattedUrl(): String {
+        var url = viewModel.projectUrl.trim()
+        if (viewModel.projectType == ProjectType.COSPEND && !isCospendSchemeLink(url)) {
+            url = url.replace("/+$".toRegex(), "") + "/index.php/apps/cospend"
+        }
+        if (viewModel.projectType == ProjectType.IHATEMONEY) {
+            url = url.replace("/+$".toRegex(), "")
+        }
+        if (!url.startsWith("http://") && !url.startsWith("https://") && isValidUrl("https://$url")) {
+            url = "https://$url"
+        }
+        return url
+    }
+
+    private fun isValidUrl(url: String): Boolean = Patterns.WEB_URL.matcher(url).matches()
+    
+    private fun isCospendSchemeLink(url: String): Boolean {
+        val data = url.toUri()
+        return (("cospend" == data.scheme || "cospend+http" == data.scheme ||
+                "cowspent" == data.scheme || "cowspent+http" == data.scheme ||
+                "ihatemoney" == data.scheme || "ihatemoney+http" == data.scheme)
+                && data.pathSegments.size >= 2)
+    }
+
+    private fun createProject() {
+        val isCospendScheme = isCospendSchemeLink(getFormattedUrl())
+        val rid = viewModel.projectId
+        if (!isCospendScheme && (rid == "" || rid.contains(",") || rid.contains("/"))) {
+            showToast(getString(R.string.error_invalid_project_remote_id), Toast.LENGTH_LONG)
+            return
+        }
+
+        if (viewModel.projectType != ProjectType.LOCAL && !isCospendScheme) {
+            if (!isValidUrl(getFormattedUrl())) {
+                showToast("Invalid URL", Toast.LENGTH_SHORT)
+                return
+            }
+            val passwordRequired = !viewModel.whatTodoIsCreate || viewModel.projectType == ProjectType.IHATEMONEY
+            if (passwordRequired && viewModel.projectPassword.isEmpty()) {
+                showToast("Invalid password", Toast.LENGTH_SHORT)
+                return
+            }
+        }
+
+        if (!viewModel.whatTodoIsCreate || viewModel.projectType == ProjectType.LOCAL) {
+            if (viewModel.projectType == ProjectType.LOCAL) {
+                val pid = saveLocalProject()
+                close(pid, false)
+            } else {
+                saveRemoteProject(false)
+            }
+        } else {
+            if (viewModel.projectName.isEmpty()) {
+                showToast("Invalid project name", Toast.LENGTH_SHORT)
+                return
+            }
+            if (!SupportUtil.isValidEmail(viewModel.projectEmail)) {
+                showToast("Invalid email", Toast.LENGTH_SHORT)
+                return
+            }
+            
+            viewModel.isCreatingRemoteProject = true
+            
+            if (!db.cowspentServerSyncHelper.createRemoteProject(
+                    viewModel.projectId, viewModel.projectName,
+                    viewModel.projectEmail, viewModel.projectPassword, getFormattedUrl(), viewModel.projectType, createRemoteCallBack
+                )
+            ) {
+                viewModel.isCreatingRemoteProject = false
+            }
+        }
+    }
+
+    private fun saveLocalProject(): Long {
+        val newProject = DBProject(
+            0, viewModel.projectId, "", viewModel.projectId, null,
+            null, null, viewModel.projectType, 0L,
+            null, false, DBProject.ACCESS_LEVEL_UNKNOWN,
+            null
+        )
+        return addProjectToDb(newProject)
+    }
+
+    private fun saveRemoteProject(ignorePassword: Boolean) {
+        val newProject = getProjectFromFields(ignorePassword)
+        if (!db.cowspentServerSyncHelper.getRemoteProjectInfo(newProject, getRemoteInfoCallBack)) {
+            showToast(getString(R.string.error_no_network), Toast.LENGTH_LONG)
+        }
+    }
+
+    private fun getProjectFromFields(ignorePassword: Boolean): DBProject {
+        var remoteId = viewModel.projectId
+        var url = getFormattedUrl()
+        var password = if (ignorePassword) "" else viewModel.projectPassword
+
+        if (isCospendSchemeLink(url)) {
+            val data = url.toUri()
+            password = if (ignorePassword) "" else (data.lastPathSegment ?: "")
+            remoteId = data.pathSegments[data.pathSegments.size - 2]
+            val protocol = if (data.scheme?.endsWith("+http") == true) "http" else "https"
+            var path = protocol + "://" + data.host + (data.path ?: "").replace(("/$remoteId/$password$").toRegex(), "")
+            if (viewModel.projectType == ProjectType.COSPEND) {
+                path = path.replace("/+$".toRegex(), "") + "/index.php/apps/cospend"
+            }
+            url = path
+        }
+
+        return DBProject(
+            0, remoteId, password, viewModel.projectName, url,
+            viewModel.projectEmail, null, viewModel.projectType, 0L,
+            null, false, DBProject.ACCESS_LEVEL_UNKNOWN,
+            null
+        )
+    }
+
+    private fun addProjectToDb(project: DBProject): Long {
+        var pid = 0L
+        runBlocking {
+            pid = withContext(Dispatchers.IO) { db.addProject(project) }
+        }
+        PreferenceManager.getDefaultSharedPreferences(this).edit {
+            putLong(
+                "selected_project",
+                pid
+            )
+        }
+        showToast(getString(R.string.project_added_success), Toast.LENGTH_LONG)
+        return pid
+    }
+
+    private val getRemoteInfoCallBack = object : ICallback {
+        override fun onFinish() {}
+        override fun onFinish(result: String, message: String) {
+            if (message.isEmpty()) {
+                val pid = addProjectToDb(getProjectFromFields(false))
+                close(pid, true)
+            } else {
+                viewModel.errorDialogMessage = getString(R.string.error_project_connect_check, message)
+            }
+        }
+        override fun onScheduled() {}
+    }
+
+    private val createRemoteCallBack = object : IProjectCreationCallback {
+        override fun onFinish(result: String, message: String, usePrivateApi: Boolean) {
+            if (message.isEmpty()) {
+                saveRemoteProject(usePrivateApi)
+            } else {
+                viewModel.errorDialogMessage = getString(R.string.error_create_remote_project_helper, message)
+                viewModel.isCreatingRemoteProject = false
+            }
+        }
+    }
+
+    private fun close(pid: Long, justAdded: Boolean) {
+        val data = Intent()
+        if (justAdded) {
+            data.putExtra(MainConstants.ADDED_PROJECT, pid)
+        } else {
+            data.putExtra(MainConstants.CREATED_PROJECT, pid)
+        }
+        setResult(RESULT_OK, data)
+        finish()
+    }
+
+    private fun showToast(text: CharSequence?, duration: Int) {
+        Toast.makeText(this, text, duration).show()
+    }
+
+    private fun importFromFile(fileUri: Uri) {
+        ProjectImportHelper.importFromFile(
+            this,
+            db,
+            fileUri,
+            onSuccess = { pid -> close(pid, false) },
+            onError = { message -> showToast(message, Toast.LENGTH_LONG) }
+        )
+    }
+
+    companion object {
+        const val PARAM_DEFAULT_NC_URL = "defaultNcUrl"
+        const val PARAM_DEFAULT_PROJECT_ID = "defaultProjectId"
+        const val PARAM_DEFAULT_PROJECT_PASSWORD = "defaultProjectPassword"
+        const val PARAM_DEFAULT_PROJECT_TYPE = "defaultProjectType"
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/create/NewProjectScreen.kt

@@ -0,0 +1,339 @@
+package net.helcel.cowspent.android.project.create
+
+import android.annotation.SuppressLint
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.selection.selectable
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.automirrored.filled.LibraryBooks
+import androidx.compose.material.icons.filled.Done
+import androidx.compose.material.icons.filled.Email
+import androidx.compose.material.icons.filled.Link
+import androidx.compose.material.icons.filled.Lock
+import androidx.compose.material.icons.filled.QrCode2
+import androidx.compose.material.icons.filled.Title
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.ProjectType
+
+@Composable
+fun NewProjectScreen(
+    viewModel: NewProjectViewModel,
+    onScanQrCode: () -> Unit,
+    onImportFile: () -> Unit,
+    onChooseFromNextcloud: () -> Unit,
+    onOkPressed: () -> Unit,
+    onBack: () -> Unit
+) {
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.action_add_project)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.primary,
+                elevation = 0.dp
+            )
+        },
+        floatingActionButton = {
+            if (viewModel.isFormValid()) {
+                FloatingActionButton(onClick = onOkPressed) {
+                    Icon(Icons.Default.Done, contentDescription = stringResource(R.string.action_save_bill))
+                }
+            }
+        }
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .padding(padding)
+                .padding(16.dp)
+                .verticalScroll(rememberScrollState())
+                .fillMaxSize()
+        ) {
+            // What to do
+            SectionRow(
+                label = stringResource(R.string.new_project_what_todo)
+            ) {
+                Row {
+                    ToggleButton(
+                        text = stringResource(R.string.todo_join_label),
+                        selected = !viewModel.whatTodoIsCreate,
+                        onClick = {
+                            viewModel.whatTodoIsCreate = false
+                            if (viewModel.projectType == ProjectType.LOCAL)
+                                viewModel.projectType = ProjectType.COSPEND
+                        }
+                    )
+                    Spacer(modifier = Modifier.width(8.dp))
+                    ToggleButton(
+                        text = stringResource(R.string.todo_create_label),
+                        selected = viewModel.whatTodoIsCreate,
+                        onClick = { viewModel.whatTodoIsCreate = true }
+                    )
+                }
+            }
+
+            Spacer(modifier = Modifier.height(16.dp))
+
+            SectionRow(
+                label = stringResource(R.string.new_project_where)
+            ) {
+                Row {
+                    if (viewModel.whatTodoIsCreate) {
+                        ToggleButton(
+                            text = stringResource(R.string.where_local_short),
+                            selected = viewModel.projectType == ProjectType.LOCAL,
+                            onClick = { viewModel.projectType = ProjectType.LOCAL }
+                        )
+                        Spacer(modifier = Modifier.width(8.dp))
+                    }
+                    ToggleButton(
+                        text = stringResource(R.string.where_cospend_short),
+                        selected = viewModel.projectType == ProjectType.COSPEND,
+                        onClick = { viewModel.projectType = ProjectType.COSPEND }
+                    )
+                    Spacer(modifier = Modifier.width(8.dp))
+                    ToggleButton(
+                        text = stringResource(R.string.where_ihatemoney_short),
+                        selected = viewModel.projectType == ProjectType.IHATEMONEY,
+                        onClick = { viewModel.projectType = ProjectType.IHATEMONEY }
+                    )
+                }
+            }
+            Spacer(modifier = Modifier.height(8.dp))
+
+            if (viewModel.whatTodoIsCreate) {
+                if (viewModel.projectType == ProjectType.COSPEND) {
+                    Button(
+                        onClick = onChooseFromNextcloud
+                    ) {
+                        Text(stringResource(R.string.new_project_from_nextcloud_tooltip))
+                    }
+                } else if (viewModel.projectType == ProjectType.LOCAL) {
+                    Button(
+                        onClick = onImportFile
+                    ) {
+                        Text(stringResource(R.string.import_tooltip))
+                    }
+                }
+            } else {
+                Spacer(modifier = Modifier.width(16.dp))
+                Button(onClick = onScanQrCode) {
+                    Text(text = stringResource(R.string.scan_qrcode))
+                    Spacer(modifier = Modifier.width(4.dp))
+                    Icon(
+                        Icons.Default.QrCode2,
+                        contentDescription = null,
+                        modifier = Modifier.size(16.dp, 16.dp),
+                    )
+                }
+            }
+
+
+            Spacer(modifier = Modifier.height(16.dp))
+
+            if (viewModel.projectType != ProjectType.LOCAL) {
+                OutlinedTextField(
+                    value = viewModel.projectUrl,
+                    onValueChange = { viewModel.projectUrl = it },
+                    label = {
+                        Text(
+                            stringResource(
+                                if (viewModel.projectType == ProjectType.COSPEND) R.string.setting_cospend_project_url
+                                else R.string.setting_ihatemoney_project_url
+                            )
+                        )
+                    },
+                    modifier = Modifier.fillMaxWidth(),
+                    leadingIcon = { Icon(Icons.Default.Link, contentDescription = null) }
+                )
+                Spacer(modifier = Modifier.height(8.dp))
+            }
+
+            OutlinedTextField(
+                value = viewModel.projectId,
+                onValueChange = { viewModel.projectId = it },
+                label = { Text(stringResource(R.string.setting_project_id)) },
+                modifier = Modifier.fillMaxWidth(),
+                leadingIcon = { Icon(Icons.AutoMirrored.Filled.LibraryBooks, contentDescription = null) }
+            )
+
+            if (viewModel.projectType != ProjectType.LOCAL && (!viewModel.whatTodoIsCreate || viewModel.projectType == ProjectType.IHATEMONEY)) {
+                Spacer(modifier = Modifier.height(8.dp))
+                OutlinedTextField(
+                    value = viewModel.projectPassword,
+                    onValueChange = { viewModel.projectPassword = it },
+                    label = { Text(stringResource(R.string.setting_new_project_password)) },
+                    modifier = Modifier.fillMaxWidth(),
+                    leadingIcon = { Icon(Icons.Default.Lock, contentDescription = null) }
+                )
+            }
+
+            if (viewModel.whatTodoIsCreate && viewModel.projectType != ProjectType.LOCAL) {
+                Spacer(modifier = Modifier.height(8.dp))
+                OutlinedTextField(
+                    value = viewModel.projectName,
+                    onValueChange = { viewModel.projectName = it },
+                    label = { Text(stringResource(R.string.setting_new_project_name)) },
+                    modifier = Modifier.fillMaxWidth(),
+                    leadingIcon = { Icon(Icons.Default.Title, contentDescription = null) }
+                )
+                Spacer(modifier = Modifier.height(8.dp))
+                OutlinedTextField(
+                    value = viewModel.projectEmail,
+                    onValueChange = { viewModel.projectEmail = it },
+                    label = { Text(stringResource(R.string.setting_new_project_email)) },
+                    modifier = Modifier.fillMaxWidth(),
+                    leadingIcon = { Icon(Icons.Default.Email, contentDescription = null) }
+                )
+            }
+        }
+    }
+
+    if (viewModel.showAuthWarningDialog) {
+        AlertDialog(
+            onDismissRequest = { viewModel.showAuthWarningDialog = false },
+            title = { Text(stringResource(R.string.auth_project_creation_title)) },
+            text = { Text(stringResource(R.string.warning_auth_project_creation)) },
+            confirmButton = {
+                TextButton(onClick = {
+                    viewModel.showAuthWarningDialog = false
+                    onOkPressed()
+                }) {
+                    Text(stringResource(android.R.string.ok))
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = { viewModel.showAuthWarningDialog = false }) {
+                    Text(stringResource(android.R.string.cancel))
+                }
+            }
+        )
+    }
+
+    if (viewModel.showNextcloudProjectDialog) {
+        AlertDialog(
+            onDismissRequest = { viewModel.showNextcloudProjectDialog = false },
+            title = { Text(stringResource(R.string.choose_account_project_dialog_title)) },
+            text = {
+                Column {
+                    viewModel.nextcloudProjects.forEach { project ->
+                        Row(
+                            Modifier
+                                .fillMaxWidth()
+                                .selectable(
+                                    selected = false,
+                                    onClick = {
+                                        viewModel.projectId = project.remoteId
+                                        viewModel.projectUrl = project.ncUrl
+                                        viewModel.showNextcloudProjectDialog = false
+                                    }
+                                )
+                                .padding(16.dp)
+                        ) {
+                            Text(text = project.name)
+                        }
+                    }
+                }
+            },
+            confirmButton = {},
+            dismissButton = {
+                TextButton(onClick = { viewModel.showNextcloudProjectDialog = false }) {
+                    Text(stringResource(R.string.simple_cancel))
+                }
+            }
+        )
+    }
+
+    if (viewModel.isCreatingRemoteProject) {
+        AlertDialog(
+            onDismissRequest = { },
+            title = { Text(stringResource(R.string.simple_loading)) },
+            text = {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    CircularProgressIndicator()
+                    Spacer(modifier = Modifier.width(16.dp))
+                    Text(stringResource(R.string.creating_remote_project))
+                }
+            },
+            confirmButton = {}
+        )
+    }
+
+    if (viewModel.errorDialogMessage != null) {
+        AlertDialog(
+            onDismissRequest = { viewModel.errorDialogMessage = null },
+            title = { Text(stringResource(R.string.simple_error)) },
+            text = { Text(viewModel.errorDialogMessage!!) },
+            confirmButton = {
+                TextButton(onClick = { viewModel.errorDialogMessage = null }) {
+                    Text(stringResource(R.string.simple_ok))
+                }
+            }
+        )
+    }
+}
+
+@Composable
+fun SectionRow(
+    label: String,
+    content: @Composable () -> Unit
+) {
+    Row(verticalAlignment = Alignment.Top) {
+        Column {
+            Text(label, fontSize = 12.sp, color = MaterialTheme.colors.onSurface)
+            content()
+        }
+    }
+}
+
+@Composable
+fun ToggleButton(
+    text: String,
+    selected: Boolean,
+    onClick: () -> Unit
+) {
+    Button(
+        onClick = onClick,
+        colors = if (selected) {
+            ButtonDefaults.buttonColors(backgroundColor = MaterialTheme.colors.primary)
+        } else {
+            ButtonDefaults.buttonColors(backgroundColor = MaterialTheme.colors.surface)
+        }
+    ) {
+        Text(
+            text,
+            fontSize = 12.sp,
+            color = if (selected) MaterialTheme.colors.onPrimary else MaterialTheme.colors.onSurface
+        )
+    }
+}
+
+@SuppressLint("ViewModelConstructorInComposable")
+@Preview
+@Composable
+fun NewProjectScreenPreview() {
+    NewProjectScreen(
+        viewModel = NewProjectViewModel().apply {
+            whatTodoIsCreate = true
+            projectType = ProjectType.COSPEND
+        },
+        onScanQrCode = {},
+        onImportFile = {},
+        onChooseFromNextcloud = {},
+        onOkPressed = {},
+        onBack = {}
+    )
+}

app/src/main/java/net/helcel/cowspent/android/project/create/NewProjectViewModel.kt

@@ -0,0 +1,95 @@
+package net.helcel.cowspent.android.project.create
+
+import android.net.Uri
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import net.helcel.cowspent.model.DBAccountProject
+import net.helcel.cowspent.model.ProjectType
+
+class NewProjectViewModel : ViewModel() {
+    var whatTodoIsCreate by mutableStateOf(false)
+    
+    private var _projectType by mutableStateOf(ProjectType.COSPEND)
+    var projectType: ProjectType
+        get() = _projectType
+        set(value) {
+            _projectType = value
+            if (value == ProjectType.IHATEMONEY && (projectUrl.isEmpty() || projectUrl == defaultNcUrl)) {
+                projectUrl = "https://ihatemoney.org"
+            } else if (value == ProjectType.COSPEND && (projectUrl == "https://ihatemoney.org" || projectUrl.isEmpty())) {
+                projectUrl = defaultNcUrl
+            }
+        }
+
+    var projectUrl by mutableStateOf("")
+    var defaultNcUrl by mutableStateOf("")
+    var projectId by mutableStateOf("")
+    var projectPassword by mutableStateOf("")
+    var projectName by mutableStateOf("")
+    var projectEmail by mutableStateOf("")
+
+    var showAuthWarningDialog by mutableStateOf(false)
+    var showNextcloudProjectDialog by mutableStateOf(false)
+    var nextcloudProjects by mutableStateOf<List<DBAccountProject>>(emptyList())
+
+    var isCreatingRemoteProject by mutableStateOf(false)
+    var errorDialogMessage by mutableStateOf<String?>(null)
+
+    fun isFormValid(): Boolean {
+        if (whatTodoIsCreate) {
+            if (projectId.isEmpty()) return false
+            if (projectType != ProjectType.LOCAL) {
+                if (projectUrl.isEmpty()) return false
+                if (projectName.isEmpty()) return false
+                if (projectEmail.isEmpty()) return false
+                if (projectType == ProjectType.IHATEMONEY && projectPassword.isEmpty()) return false
+            }
+        } else {
+            // Join
+            if (projectType == ProjectType.LOCAL) return false
+            if (projectId.isEmpty() && !isCospendSchemeLink(projectUrl)) return false
+            if (projectUrl.isEmpty() && !isCospendSchemeLink(projectUrl)) return false
+            if (projectPassword.isEmpty() && !isCospendSchemeLink(projectUrl)) return false
+        }
+        return true
+    }
+
+    private fun isCospendSchemeLink(url: String): Boolean {
+        return url.startsWith("cospend://") || url.startsWith("cospend+http://") ||
+                url.startsWith("cowspent://") || url.startsWith("cowspent+http://") ||
+                url.startsWith("ihatemoney://") || url.startsWith("ihatemoney+http://")
+    }
+
+    fun updateFromUri(data: Uri) {
+        if ((data.scheme == "cospend" || data.scheme == "cospend+http" ||
+                    data.scheme == "cowspent" || data.scheme == "cowspent+http" ||
+                    data.scheme == "ihatemoney" || data.scheme == "ihatemoney+http")
+            && data.pathSegments.isNotEmpty()
+        ) {
+            val password: String
+            val pid: String
+            if (data.path!!.endsWith("/")) {
+                password = ""
+                pid = data.lastPathSegment!!
+            } else {
+                password = data.lastPathSegment!!
+                pid = data.pathSegments[data.pathSegments.size - 2]
+            }
+            var protocol = "https"
+            if (data.scheme == "cospend+http" || data.scheme == "cowspent+http" || data.scheme == "ihatemoney+http") {
+                protocol = "http"
+            }
+            val url = protocol + "://" + data.host
+            val port = if (data.port != -1) ":${data.port}" else ""
+            val fullUrl = "$url$port${data.path!!.replace(("/$pid/$password$").toRegex(), "")}"
+
+            projectPassword = password
+            projectId = pid
+            projectUrl = fullUrl
+            projectType = if (data.scheme?.startsWith("ihatemoney") == true) ProjectType.IHATEMONEY else ProjectType.COSPEND
+            whatTodoIsCreate = false
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/edit/EditProjectActivity.kt

@@ -0,0 +1,192 @@
+package net.helcel.cowspent.android.project.edit
+
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Toast
+import androidx.activity.compose.setContent
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.showToast
+import net.helcel.cowspent.model.DBProject
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.theme.ThemeUtils
+import net.helcel.cowspent.util.ICallback
+import net.helcel.cowspent.util.SupportUtil
+import net.helcel.cowspent.android.main.MainConstants
+
+
+class EditProjectActivity : AppCompatActivity() {
+
+    private val viewModel: EditProjectViewModel by viewModels()
+    private lateinit var db: CowspentSQLiteOpenHelper
+    private lateinit var project: DBProject
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        db = CowspentSQLiteOpenHelper.getInstance(this)
+        
+        val id = intent.getLongExtra(PARAM_PROJECT_ID, 0)
+        if (id <= 0) {
+            finish()
+            return
+        }
+        
+        lifecycleScope.launch {
+            project = withContext(Dispatchers.IO) { db.getProject(id) }!!
+            viewModel.initFromProject(project)
+
+            setContent {
+                ThemeUtils.CowspentTheme {
+                    EditProjectScreen(
+                        viewModel = viewModel,
+                        onSave = { onSave() },
+                        onDeleteRemote = { onDeleteRemote() },
+                        onBack = { finish() }
+                    )
+                }
+            }
+        }
+    }
+
+    private fun onSave() {
+        val currentPwd = viewModel.password
+        val newPwd = viewModel.newPassword
+        val newName = viewModel.name
+        val newEmail = viewModel.email
+
+        if (newName.isEmpty()) {
+            showToast(this, getString(R.string.error_invalid_project_name), Toast.LENGTH_LONG)
+            return
+        }
+        if (newEmail.isNotEmpty() && !SupportUtil.isValidEmail(newEmail)) {
+            showToast(this, getString(R.string.error_invalid_email), Toast.LENGTH_LONG)
+            return
+        }
+
+        val nameChanged = newName != project.name
+        val emailChanged = newEmail != project.email
+        val pwdChanged = newPwd != project.password
+        val currentPwdChanged = currentPwd != project.password
+
+        if (!nameChanged && !emailChanged && !pwdChanged && !currentPwdChanged) {
+            showToast(this, getString(R.string.project_edition_no_change), Toast.LENGTH_LONG)
+            return
+        }
+
+        if (project.isLocal) {
+            val targetPwd = if (pwdChanged) newPwd else currentPwd
+            lifecycleScope.launch {
+                withContext(Dispatchers.IO) {
+                    db.updateProject(
+                        project.id, newName, newEmail, targetPwd,
+                        null, project.type, null,
+                        null, null,
+                        null, null
+                    )
+                }
+                closeOnEdit(project.id)
+            }
+            return
+        }
+
+        // Remote project
+        if (nameChanged || emailChanged || pwdChanged) {
+            // Update local password first if currentPwd was changed (user fixing credentials)
+            if (currentPwdChanged) {
+                project.password = currentPwd
+                lifecycleScope.launch {
+                    withContext(Dispatchers.IO) {
+                        db.updateProject(project.id, null, null, currentPwd, null, project.type, null, null, null, null, null)
+                    }
+                }
+            }
+
+            if (!db.cowspentServerSyncHelper.editRemoteProject(
+                    project.id,
+                    newName,
+                    newEmail,
+                    if (pwdChanged) newPwd else null,
+                    null,
+                    editCallBack
+                )
+            ) {
+                showToast(this, getString(R.string.remote_project_operation_no_network), Toast.LENGTH_LONG)
+            }
+        } else {
+            // Only current password changed locally (fixing credentials)
+            lifecycleScope.launch {
+                withContext(Dispatchers.IO) {
+                    db.updateProject(
+                        project.id, null, null, currentPwd,
+                        null, project.type, null,
+                        null, null,
+                        null, null
+                    )
+                }
+                closeOnEdit(project.id)
+            }
+        }
+    }
+
+    private fun onDeleteRemote() {
+        viewModel.showDialog(
+            message = getString(R.string.confirm_delete_project_dialog_title),
+            positiveText = getString(R.string.simple_yes),
+            onConfirm = {
+                if (!db.cowspentServerSyncHelper.deleteRemoteProject(project.id, deleteCallBack)) {
+                    showToast(this, getString(R.string.remote_project_operation_no_network), Toast.LENGTH_LONG)
+                }
+            },
+            negativeText = getString(R.string.simple_no)
+        )
+    }
+
+    private val editCallBack = object : ICallback {
+        override fun onFinish() {}
+        override fun onFinish(result: String, message: String) {
+            if (message.isEmpty()) {
+                closeOnEdit(project.id)
+            } else {
+                showToast(this@EditProjectActivity, getString(R.string.error_edit_remote_project_helper, message), Toast.LENGTH_LONG)
+            }
+        }
+        override fun onScheduled() {}
+    }
+
+    private val deleteCallBack = object : ICallback {
+        override fun onFinish() {}
+        override fun onFinish(result: String, message: String) {
+            if (message.isEmpty()) {
+                closeOnDelete(result.toLong())
+            } else {
+                showToast(this@EditProjectActivity, getString(R.string.error_edit_remote_project_helper, message), Toast.LENGTH_LONG)
+            }
+        }
+        override fun onScheduled() {}
+    }
+
+    private fun closeOnDelete(projId: Long) {
+        val data = Intent()
+        data.putExtra(MainConstants.DELETED_PROJECT, projId)
+        setResult(RESULT_OK, data)
+        finish()
+    }
+
+    private fun closeOnEdit(projId: Long) {
+        val data = Intent()
+        data.putExtra(MainConstants.EDITED_PROJECT, projId)
+        setResult(RESULT_OK, data)
+        finish()
+    }
+
+
+
+    companion object {
+        const val PARAM_PROJECT_ID = "projectId"
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/edit/EditProjectScreen.kt

@@ -0,0 +1,145 @@
+package net.helcel.cowspent.android.project.edit
+
+import android.annotation.SuppressLint
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.DeleteForever
+import androidx.compose.material.icons.filled.Done
+import androidx.compose.material.icons.filled.Email
+import androidx.compose.material.icons.filled.Lock
+import androidx.compose.material.icons.filled.LockOpen
+import androidx.compose.material.icons.filled.Title
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.AlertDialog
+
+@Composable
+fun EditProjectScreen(
+    viewModel: EditProjectViewModel,
+    onSave: () -> Unit,
+    onDeleteRemote: () -> Unit,
+    onBack: () -> Unit
+) {
+    val dialogState = viewModel.dialogState
+    if (dialogState != null) {
+        AlertDialog(
+            showDialog = true,
+            onDismissRequest = { viewModel.dismissDialog() },
+            title = dialogState.title,
+            message = dialogState.message,
+            icon = dialogState.icon,
+            items = dialogState.items,
+            positiveText = dialogState.positiveText,
+            negativeText = dialogState.negativeText,
+            neutralText = dialogState.neutralText,
+            onConfirm = {
+                dialogState.onConfirm?.invoke()
+                viewModel.dismissDialog()
+            },
+            onCancel = {
+                dialogState.onCancel?.invoke()
+                viewModel.dismissDialog()
+            },
+            onNeutral = {
+                dialogState.onNeutral?.invoke()
+                viewModel.dismissDialog()
+            }
+        ) {
+            dialogState.onItemSelected?.invoke(it)
+            viewModel.dismissDialog()
+        }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.simple_edit_project)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                actions = {
+                    IconButton(onClick = onDeleteRemote) {
+                        Icon(Icons.Default.DeleteForever, contentDescription = stringResource(R.string.menu_delete_project_remote))
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.surface,
+                elevation = 0.dp
+            )
+        },
+        floatingActionButton = {
+            FloatingActionButton(onClick = onSave) {
+                Icon(Icons.Default.Done, contentDescription = stringResource(R.string.menu_save_project))
+            }
+        }
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .padding(padding)
+                .padding(16.dp)
+                .fillMaxSize()
+        ) {
+            OutlinedTextField(
+                value = viewModel.name,
+                onValueChange = { viewModel.name = it },
+                label = { Text(stringResource(R.string.setting_new_project_name)) },
+                modifier = Modifier.fillMaxWidth(),
+                leadingIcon = { Icon(Icons.Default.Title, contentDescription = null) }
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            OutlinedTextField(
+                value = viewModel.password,
+                onValueChange = { viewModel.password = it },
+                label = { Text(stringResource(R.string.setting_password)) },
+                modifier = Modifier.fillMaxWidth(),
+                leadingIcon = { Icon(Icons.Default.Lock, contentDescription = null) }
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            OutlinedTextField(
+                value = viewModel.newPassword,
+                onValueChange = { viewModel.newPassword = it },
+                label = { Text(stringResource(R.string.setting_new_project_password)) },
+                modifier = Modifier.fillMaxWidth(),
+                leadingIcon = { Icon(Icons.Default.LockOpen, contentDescription = null) }
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            OutlinedTextField(
+                value = viewModel.email,
+                onValueChange = { viewModel.email = it },
+                label = { Text(stringResource(R.string.setting_new_project_email)) },
+                modifier = Modifier.fillMaxWidth(),
+                leadingIcon = { Icon(Icons.Default.Email, contentDescription = null) }
+            )
+        }
+    }
+}
+
+@SuppressLint("ViewModelConstructorInComposable")
+@Preview(showBackground = true)
+@Composable
+fun EditProjectScreenPreview() {
+    MaterialTheme {
+        EditProjectScreen(
+            viewModel = EditProjectViewModel().apply {
+                name = "My Awesome Project"
+                email = "user@example.com"
+            },
+            onSave = {},
+            onDeleteRemote = {},
+            onBack = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/edit/EditProjectViewModel.kt

@@ -0,0 +1,57 @@
+package net.helcel.cowspent.android.project.edit
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.lifecycle.ViewModel
+import net.helcel.cowspent.android.helper.DialogState
+import net.helcel.cowspent.model.DBProject
+
+class EditProjectViewModel : ViewModel() {
+    var name by mutableStateOf("")
+    var password by mutableStateOf("")
+    var newPassword by mutableStateOf("")
+    var email by mutableStateOf("")
+
+    var dialogState by mutableStateOf<DialogState?>(null)
+
+    fun showDialog(
+        title: String? = null,
+        message: String? = null,
+        icon: ImageVector? = null,
+        items: List<CharSequence>? = null,
+        positiveText: String? = null,
+        negativeText: String? = null,
+        neutralText: String? = null,
+        onConfirm: (() -> Unit)? = null,
+        onCancel: (() -> Unit)? = null,
+        onNeutral: (() -> Unit)? = null,
+        onItemSelected: ((Int) -> Unit)? = null
+    ) {
+        dialogState = DialogState(
+            title = title,
+            message = message,
+            icon = icon,
+            items = items,
+            positiveText = positiveText,
+            negativeText = negativeText,
+            neutralText = neutralText,
+            onConfirm = onConfirm,
+            onCancel = onCancel,
+            onNeutral = onNeutral,
+            onItemSelected = onItemSelected
+        )
+    }
+
+    fun dismissDialog() {
+        dialogState = null
+    }
+
+    fun initFromProject(project: DBProject) {
+        name = if (project.name == "null") "" else project.name
+        password = project.password
+        newPassword = project.password
+        email = project.email?.let { if (it == "null") "" else it } ?: ""
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/member/MemberAddDialog.kt

@@ -0,0 +1,70 @@
+package net.helcel.cowspent.android.project.member
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.KeyboardCapitalization
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.tooling.preview.Preview
+import net.helcel.cowspent.R
+
+@Composable
+fun MemberAddDialogContent(
+    onAdd: (String) -> Unit,
+    onDismiss: () -> Unit
+) {
+    var name by remember { mutableStateOf("") }
+
+    Surface(
+        shape = MaterialTheme.shapes.large,
+        color = MaterialTheme.colors.surface,
+        contentColor = contentColorFor(MaterialTheme.colors.surface)
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+        ) {
+            Text(
+                text = stringResource(R.string.add_member_dialog_title),
+                style = MaterialTheme.typography.h6,
+                modifier = Modifier.padding(bottom = 16.dp)
+            )
+
+            OutlinedTextField(
+                value = name,
+                onValueChange = { name = it },
+                label = { Text(stringResource(R.string.member_edit_name)) },
+                modifier = Modifier.fillMaxWidth(),
+                keyboardOptions = KeyboardOptions(capitalization = KeyboardCapitalization.Sentences),
+                singleLine = true
+            )
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.End) {
+                TextButton(onClick = onDismiss) {
+                    Text(stringResource(R.string.simple_cancel).uppercase())
+                }
+                TextButton(onClick = {
+                    if (name.isNotEmpty()) {
+                        onAdd(name)
+                    }
+                }) {
+                    Text(stringResource(R.string.simple_ok).uppercase())
+                }
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun MemberAddDialogContentPreview() {
+    MaterialTheme {
+        MemberAddDialogContent(onAdd = {}, onDismiss = {})
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/member/MemberEditDialog.kt

@@ -0,0 +1,208 @@
+package net.helcel.cowspent.android.project.member
+
+import android.graphics.Color
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.KeyboardCapitalization
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.material.icons.filled.*
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.ColorPicker
+import net.helcel.cowspent.android.helper.TextDrawable
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.util.ColorUtils
+
+@Composable
+fun MemberEditDialogContent(
+    member: DBMember,
+    onSave: (String, Double, Boolean, Int?, Int?, Int?) -> Unit,
+    onDelete: () -> Unit,
+    onDismiss: () -> Unit
+) {
+    var name by remember { mutableStateOf(member.name) }
+    var weight by remember { mutableStateOf(member.weight.toString()) }
+    var isActivated by remember { mutableStateOf(member.isActivated) }
+    
+    val initialColor = remember {
+        if (member.r != null && member.g != null && member.b != null) {
+            Color.rgb(member.r!!, member.g!!, member.b!!)
+        } else {
+            TextDrawable.getColorFromName(member.name)
+        }
+    }
+    var selectedColor by remember { mutableIntStateOf(initialColor) }
+    var showColorPicker by remember { mutableStateOf(false) }
+
+    Surface(
+        shape = MaterialTheme.shapes.large,
+        color = MaterialTheme.colors.surface,
+        contentColor = contentColorFor(MaterialTheme.colors.surface)
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+                .verticalScroll(rememberScrollState())
+        ) {
+            Text(
+                text = stringResource(R.string.edit_member_dialog_title),
+                style = MaterialTheme.typography.h6,
+                modifier = Modifier.padding(bottom = 16.dp)
+            )
+
+            // Name
+            OutlinedTextField(
+                value = name,
+                onValueChange = { name = it },
+                label = { Text(stringResource(R.string.member_edit_name)) },
+                modifier = Modifier.fillMaxWidth(),
+                leadingIcon = {
+                    Icon(Icons.Default.Person, contentDescription = null)
+                },
+                keyboardOptions = KeyboardOptions(capitalization = KeyboardCapitalization.Sentences)
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            // Weight
+            OutlinedTextField(
+                value = weight,
+                onValueChange = { weight = it },
+                label = { Text(stringResource(R.string.member_edit_weight)) },
+                modifier = Modifier.fillMaxWidth(),
+                leadingIcon = {
+                    Icon(Icons.Default.LineWeight, contentDescription = null)
+                },
+                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number)
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            // Activated
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .clickable { isActivated = !isActivated }
+                    .padding(vertical = 8.dp)
+            ) {
+                Icon(Icons.Default.Block, contentDescription = null)
+                Spacer(modifier = Modifier.width(16.dp))
+                Text(stringResource(R.string.member_edit_toggle), modifier = Modifier.weight(1f))
+                Checkbox(checked = isActivated, onCheckedChange = { isActivated = it })
+            }
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            // Color
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(vertical = 8.dp)
+            ) {
+                Icon(Icons.Default.Palette, contentDescription = null)
+                Spacer(modifier = Modifier.width(16.dp))
+                Text(stringResource(R.string.member_edit_color), modifier = Modifier.weight(1f))
+                Box(
+                    modifier = Modifier
+                        .size(40.dp)
+                        .background(androidx.compose.ui.graphics.Color(selectedColor))
+                        .clickable { showColorPicker = true }
+                        .padding(8.dp),
+                    contentAlignment = Alignment.Center
+                ) {
+                    Icon(
+                        Icons.Default.Edit,
+                        contentDescription = null,
+                        tint = if (ColorUtils.isLightColor(selectedColor)) androidx.compose.ui.graphics.Color.Black else androidx.compose.ui.graphics.Color.White
+                    )
+                }
+            }
+
+            Spacer(modifier = Modifier.height(16.dp))
+
+            // Delete
+            Button(
+                onClick = onDelete,
+                colors = ButtonDefaults.buttonColors(backgroundColor = MaterialTheme.colors.error),
+                modifier = Modifier.align(Alignment.CenterHorizontally)
+            ) {
+                Icon(Icons.Default.Delete, contentDescription = null)
+                Spacer(modifier = Modifier.width(8.dp))
+                Text(stringResource(R.string.member_edit_delete))
+            }
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            // Buttons
+            Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.End) {
+                TextButton(onClick = onDismiss) {
+                    Text(stringResource(R.string.simple_cancel).uppercase())
+                }
+                TextButton(onClick = {
+                    val w = weight.replace(',', '.').toDoubleOrNull()
+                    if (name.isNotEmpty() && w != null) {
+                        onSave(
+                            name,
+                            w,
+                            isActivated,
+                            Color.red(selectedColor),
+                            Color.green(selectedColor),
+                            Color.blue(selectedColor)
+                        )
+                    }
+                }) {
+                    Text(stringResource(R.string.simple_ok).uppercase())
+                }
+            }
+        }
+    }
+
+    if (showColorPicker) {
+        AlertDialog(
+            onDismissRequest = { showColorPicker = false },
+            title = { Text(stringResource(R.string.settings_colorpicker_title)) },
+            text = {
+                ColorPicker(initialColor = selectedColor) {
+                    selectedColor = it
+                }
+            },
+            confirmButton = {
+                TextButton(onClick = { showColorPicker = false }) {
+                    Text(stringResource(R.string.simple_ok).uppercase())
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = { showColorPicker = false }) {
+                    Text(stringResource(R.string.simple_cancel).uppercase())
+                }
+            }
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun MemberEditDialogContentPreview() {
+    MaterialTheme {
+        MemberEditDialogContent(
+            member = DBMember(1, 0, 0, "Alice", true, 1.0, 0, null, null, null, null, null),
+            onSave = { _, _, _, _, _, _ -> },
+            onDelete = {},
+            onDismiss = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/project/member/MemberManagementDialog.kt

@@ -0,0 +1,132 @@
+package net.helcel.cowspent.android.project.member
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.material.Icon
+import androidx.compose.material.IconButton
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Surface
+import androidx.compose.material.Text
+import androidx.compose.material.TextButton
+import androidx.compose.material.contentColorFor
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.UserAvatar
+import net.helcel.cowspent.android.helper.lazyVerticalScrollbar
+import net.helcel.cowspent.model.DBMember
+
+@Composable
+fun MemberManagementDialogContent(
+    members: List<DBMember>,
+    onAddMember: () -> Unit,
+    onEditMember: (DBMember) -> Unit,
+    onDismiss: () -> Unit
+) {
+    val listState = rememberLazyListState()
+    Surface(
+        shape = MaterialTheme.shapes.large,
+        color = MaterialTheme.colors.surface,
+        contentColor = contentColorFor(MaterialTheme.colors.surface)
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .heightIn(max = 500.dp)
+                .padding(16.dp)
+        ) {
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(
+                    text = stringResource(R.string.fab_manage_members),
+                    style = MaterialTheme.typography.h6
+                )
+                IconButton(onClick = onAddMember) {
+                    Icon(Icons.Default.Add,modifier=Modifier.size(32.dp),
+                        contentDescription = stringResource(R.string.fab_add_member))
+                }
+            }
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            LazyColumn(
+                state = listState,
+                modifier = Modifier
+                    .weight(1f, fill = false)
+                    .lazyVerticalScrollbar(listState)
+            ) {
+                items(members) { member ->
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .clickable { onEditMember(member) }
+                            .padding(vertical = 12.dp),
+                        verticalAlignment = Alignment.CenterVertically
+                    ) {
+                        UserAvatar(
+                            name = member.name,
+                            r = member.r,
+                            g = member.g,
+                            b = member.b,
+                            avatar = member.avatar,
+                            disabled = !member.isActivated,
+                            size = 40.dp
+                        )
+                        Spacer(modifier = Modifier.width(16.dp))
+                        Text(
+                            text = member.name,
+                            style = MaterialTheme.typography.body1
+                        )
+                    }
+                }
+            }
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.End) {
+                TextButton(onClick = onDismiss) {
+                    Text(stringResource(R.string.simple_close).uppercase())
+                }
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun MemberManagementDialogContentPreview() {
+    MaterialTheme {
+        MemberManagementDialogContent(
+            members = listOf(
+                DBMember(1, 0, 1, "Alice", true, 1.0, 0, 255, 100, 100, null, null),
+                DBMember(2, 0, 1, "Bob", true, 1.0, 0, 100, 255, 100, null, null),
+                DBMember(3, 0, 1, "Charlie", false, 1.0, 0, 100, 100, 255, null, null)
+            ),
+            onAddMember = {},
+            onEditMember = {},
+            onDismiss = {}
+        )
+    }
+}
+

app/src/main/java/net/helcel/cowspent/android/project/settle/ProjectSettlementScreen.kt

@@ -0,0 +1,401 @@
+package net.helcel.cowspent.android.project.settle
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.Divider
+import androidx.compose.material.DropdownMenu
+import androidx.compose.material.DropdownMenuItem
+import androidx.compose.material.ExperimentalMaterialApi
+import androidx.compose.material.Icon
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Surface
+import androidx.compose.material.Text
+import androidx.compose.material.TextButton
+import androidx.compose.material.contentColorFor
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowDropDown
+import androidx.compose.material.icons.filled.CenterFocusStrong
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableLongStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.colorResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.DBProject
+import net.helcel.cowspent.model.Transaction
+import net.helcel.cowspent.model.UserItem
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.util.SupportUtil
+import net.helcel.cowspent.util.SupportUtil.SETTLE_OPTIMAL
+import net.helcel.cowspent.util.SupportUtil.settleBills
+
+@Composable
+fun ProjectSettlementDialogContent(
+    proj: DBProject,
+    db: CowspentSQLiteOpenHelper,
+    onSettleBills: (List<Transaction>) -> Unit,
+    onShare: (List<Transaction>, Map<Long, String>) -> Unit,
+    onDismiss: () -> Unit
+) {
+    val centerNoneStr = stringResource(R.string.center_none)
+    val memberList = remember(proj.id) { db.getMembersOfProject(proj.id, null) }
+    val userList = remember(memberList, centerNoneStr) {
+        buildList {
+            add(UserItem(SETTLE_OPTIMAL, centerNoneStr))
+            addAll(memberList.map { UserItem(it.id, it.name) })
+        }
+    }
+
+    val membersBalance = remember(proj.id) {
+        val balance = mutableMapOf<Long, Double>()
+        SupportUtil.getStatsOfProject(
+            proj.id, db,
+            mutableMapOf(), balance, mutableMapOf(), mutableMapOf(),
+            -1000, -1000, null, null
+        )
+        balance
+    }
+
+    val membersSortedByName = remember(proj.id) {
+        db.getMembersOfProject(proj.id, CowspentSQLiteOpenHelper.key_name)
+    }
+
+    val memberIdToName = remember(membersSortedByName) {
+        membersSortedByName.associate { it.id to it.name }
+    }
+
+    var selectedMemberId by remember(userList) {
+        mutableLongStateOf(userList.firstOrNull()?.id ?: SETTLE_OPTIMAL)
+    }
+
+    val transactions = remember(selectedMemberId, membersBalance, membersSortedByName) {
+        settleBills(membersSortedByName, membersBalance, selectedMemberId)
+    }
+
+    ProjectSettlementUI(
+        transactions = transactions,
+        userList = userList,
+        selectedMemberId = selectedMemberId,
+        memberIdToName = memberIdToName,
+        onMemberSelected = { selectedMemberId = it },
+        onSettleBills = onSettleBills,
+        onShare = onShare,
+        onDismiss = onDismiss
+    )
+}
+
+@Composable
+fun ProjectSettlementUI(
+    transactions: List<Transaction>,
+    userList: List<UserItem>,
+    selectedMemberId: Long,
+    memberIdToName: Map<Long, String>,
+    onMemberSelected: (Long) -> Unit,
+    onSettleBills: (List<Transaction>) -> Unit,
+    onShare: (List<Transaction>, Map<Long, String>) -> Unit,
+    onDismiss: () -> Unit
+) {
+    Surface(
+        shape = MaterialTheme.shapes.large,
+        color = MaterialTheme.colors.surface,
+        contentColor = contentColorFor(MaterialTheme.colors.surface)
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .heightIn(max = 480.dp)
+                .padding(16.dp)
+        ) {
+            Text(
+                text = stringResource(R.string.settle_dialog_title),
+                style = MaterialTheme.typography.h6,
+                modifier = Modifier.padding(bottom = 16.dp)
+            )
+
+            if (transactions.isEmpty()) {
+                BalancedStateMessage()
+            } else {
+                MemberSelector(
+                    selectedMemberId = selectedMemberId,
+                    userList = userList,
+                    onMemberSelected = onMemberSelected
+                )
+
+                Spacer(modifier = Modifier.height(16.dp))
+
+                TransactionTable(
+                    transactions = transactions,
+                    memberIdToName = memberIdToName,
+                    modifier = Modifier.weight(1f, fill = false)
+                )
+            }
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            ActionButtons(
+                transactions = transactions,
+                memberIdToName = memberIdToName,
+                onShare = onShare,
+                onSettleBills = onSettleBills,
+                onDismiss = onDismiss
+            )
+        }
+    }
+}
+
+@Composable
+private fun BalancedStateMessage() {
+    Box(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(vertical = 32.dp),
+        contentAlignment = Alignment.Center
+    ) {
+        Text(
+            text = stringResource(R.string.settle_dialog_balanced),
+            style = MaterialTheme.typography.body1
+        )
+    }
+}
+
+@OptIn(ExperimentalMaterialApi::class)
+@Composable
+private fun MemberSelector(
+    selectedMemberId: Long,
+    userList: List<UserItem>,
+    onMemberSelected: (Long) -> Unit
+) {
+    var expanded by remember { mutableStateOf(false) }
+
+    Surface(
+        onClick = { expanded = true },
+        shape = MaterialTheme.shapes.medium,
+        color = colorResource(R.color.fg_default_low).copy(alpha = 0.05f),
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier.padding(horizontal = 12.dp, vertical = 12.dp)
+        ) {
+            Icon(
+                Icons.Default.CenterFocusStrong,
+                contentDescription = null,
+                modifier = Modifier.size(20.dp),
+                tint = colorResource(R.color.fg_default_low)
+            )
+            Spacer(modifier = Modifier.width(12.dp))
+
+            Text(
+                text = userList.find { it.id == selectedMemberId }?.name ?: "",
+                style = MaterialTheme.typography.body1,
+                fontWeight = FontWeight.Medium,
+                modifier = Modifier.weight(1f)
+            )
+
+            Icon(
+                Icons.Default.ArrowDropDown,
+                contentDescription = null,
+                tint = colorResource(R.color.fg_default_low)
+            )
+
+            DropdownMenu(
+                expanded = expanded,
+                onDismissRequest = { expanded = false }
+            ) {
+                userList.forEach { user ->
+                    DropdownMenuItem(onClick = {
+                        onMemberSelected(user.id)
+                        expanded = false
+                    }) {
+                        Text(
+                            text = user.name,
+                            style = MaterialTheme.typography.body1
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun TransactionTable(
+    transactions: List<Transaction>,
+    memberIdToName: Map<Long, String>,
+    modifier: Modifier = Modifier
+) {
+    Column(modifier = modifier) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(vertical = 8.dp)
+        ) {
+            TableHeaderText(stringResource(R.string.settle_who), Modifier.weight(1.2f))
+            TableHeaderText(stringResource(R.string.settle_to_whom), Modifier.weight(1.2f))
+            TableHeaderText(stringResource(R.string.settle_how_much), Modifier.weight(1f), TextAlign.End)
+        }
+
+        Divider(color = colorResource(R.color.fg_default_low).copy(alpha = 0.12f))
+
+        LazyColumn(
+            modifier = Modifier.weight(1f),
+            verticalArrangement = Arrangement.spacedBy(4.dp)
+        ) {
+            items(transactions) { t ->
+                TransactionRow(t, memberIdToName)
+            }
+        }
+    }
+}
+
+@Composable
+private fun TableHeaderText(
+    text: String,
+    modifier: Modifier = Modifier,
+    textAlign: TextAlign = TextAlign.Start
+) {
+    Text(
+        text = text.uppercase(),
+        modifier = modifier,
+        fontWeight = FontWeight.SemiBold,
+        style = MaterialTheme.typography.overline,
+        color = colorResource(R.color.fg_default_low),
+        textAlign = textAlign,
+        letterSpacing = 0.8.sp
+    )
+}
+
+@Composable
+private fun TransactionRow(
+    transaction: Transaction,
+    memberIdToName: Map<Long, String>
+) {
+    Surface(
+        shape = MaterialTheme.shapes.medium,
+        color = Color.Transparent
+    ) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(vertical = 12.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                text = memberIdToName[transaction.owerMemberId] ?: "-",
+                modifier = Modifier.weight(1.2f),
+                style = MaterialTheme.typography.body2,
+                color = colorResource(R.color.fg_default)
+            )
+            Text(
+                text = memberIdToName[transaction.receiverMemberId] ?: "-",
+                modifier = Modifier.weight(1.2f),
+                style = MaterialTheme.typography.body2,
+                color = colorResource(R.color.fg_default)
+            )
+            Text(
+                text = SupportUtil.normalNumberFormat.format(transaction.amount),
+                modifier = Modifier.weight(1f),
+                textAlign = TextAlign.End,
+                style = MaterialTheme.typography.body1,
+                fontWeight = FontWeight.Bold,
+                color = colorResource(R.color.fg_default)
+            )
+        }
+    }
+}
+
+@Composable
+private fun ActionButtons(
+    transactions: List<Transaction>,
+    memberIdToName: Map<Long, String>,
+    onShare: (List<Transaction>, Map<Long, String>) -> Unit,
+    onSettleBills: (List<Transaction>) -> Unit,
+    onDismiss: () -> Unit
+) {
+    Row(
+        modifier = Modifier.fillMaxWidth(),
+        horizontalArrangement = Arrangement.spacedBy(8.dp, Alignment.End),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        if (transactions.isNotEmpty()) {
+            TextButton(onClick = { onShare(transactions, memberIdToName) }) {
+                Text(stringResource(R.string.simple_settle_share).uppercase())
+            }
+            TextButton(onClick = { onSettleBills(transactions) }) {
+                Text(stringResource(R.string.simple_create_bills).uppercase())
+            }
+        }
+        TextButton(onClick = onDismiss) {
+            Text(stringResource(R.string.simple_ok).uppercase())
+        }
+    }
+}
+
+@Preview(showBackground = true, name = "With Transactions")
+@Composable
+fun ProjectSettlementUIPreview() {
+    MaterialTheme {
+        ProjectSettlementUI(
+            transactions = listOf(
+                Transaction(1, 2, 25.50),
+                Transaction(3, 1, 10.00),
+                Transaction(2, 3, 5.25)
+            ),
+            userList = listOf(
+                UserItem(SETTLE_OPTIMAL, "None (Optimal)"),
+                UserItem(1, "Alice"),
+                UserItem(2, "Bob"),
+                UserItem(3, "Charlie")
+            ),
+            selectedMemberId = SETTLE_OPTIMAL,
+            memberIdToName = mapOf(1L to "Alice", 2L to "Bob", 3L to "Charlie"),
+            onMemberSelected = {},
+            onSettleBills = {},
+            onShare = { _, _ -> },
+            onDismiss = {}
+        )
+    }
+}
+
+@Preview(showBackground = true, name = "Balanced")
+@Composable
+fun ProjectSettlementUIBalancedPreview() {
+    MaterialTheme {
+        ProjectSettlementUI(
+            transactions = emptyList(),
+            userList = listOf(
+                UserItem(SETTLE_OPTIMAL, "None (Optimal)"),
+                UserItem(1, "Alice"),
+                UserItem(2, "Bob")
+            ),
+            selectedMemberId = SETTLE_OPTIMAL,
+            memberIdToName = mapOf(1L to "Alice", 2L to "Bob"),
+            onMemberSelected = {},
+            onSettleBills = {},
+            onShare = { _, _ -> },
+            onDismiss = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/settings/PreferencesActivity.kt

@@ -0,0 +1,71 @@
+package net.helcel.cowspent.android.settings
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
+import androidx.activity.compose.setContent
+import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.core.app.NavUtils
+import androidx.preference.PreferenceManager
+import net.helcel.cowspent.android.about.AboutActivity
+import net.helcel.cowspent.android.account.AccountActivity
+import net.helcel.cowspent.theme.ThemeUtils
+import net.helcel.cowspent.util.ColorUtils
+
+/**
+ * Allows to change application settings.
+ */
+class PreferencesActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                NavUtils.navigateUpFromSameTask(this@PreferencesActivity)
+            }
+        })
+
+        setResult(RESULT_CANCELED)
+
+        setContent {
+            val context = LocalContext.current
+            val sharedPreferences = remember { PreferenceManager.getDefaultSharedPreferences(context) }
+            val nightModeKey = stringResource(net.helcel.cowspent.R.string.pref_key_night_mode)
+
+            var appColor by remember {
+                mutableIntStateOf(ColorUtils.primaryColor(context))
+            }
+            var nightMode by remember {
+                mutableStateOf(sharedPreferences.getString(nightModeKey, "-1") ?: "-1")
+            }
+
+            val isDarkTheme = when (nightMode) {
+                "1" -> false
+                "2" -> true
+                else -> androidx.compose.foundation.isSystemInDarkTheme()
+            }
+
+            ThemeUtils.CowspentTheme(accentColor = appColor, darkTheme = isDarkTheme) {
+                SettingsScreen(
+                    onBack = { NavUtils.navigateUpFromSameTask(this) },
+                    onAccountSettingsClick = {
+                        startActivity(Intent(this, AccountActivity::class.java))
+                    },
+                    onAboutClick = {
+                        startActivity(Intent(this, AboutActivity::class.java))
+                    },
+                    onColorSelected = { appColor = it },
+                    onNightModeChanged = { nightMode = it }
+                )
+            }
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/settings/SettingsScreen.kt

@@ -0,0 +1,449 @@
+package net.helcel.cowspent.android.settings
+
+import android.graphics.Color
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.selection.selectable
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.AlertDialog
+import androidx.compose.material.Icon
+import androidx.compose.material.IconButton
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.RadioButton
+import androidx.compose.material.Scaffold
+import androidx.compose.material.Switch
+import androidx.compose.material.SwitchDefaults
+import androidx.compose.material.Text
+import androidx.compose.material.TextButton
+import androidx.compose.material.TopAppBar
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.AccountCircle
+import androidx.compose.material.icons.filled.Archive
+import androidx.compose.material.icons.filled.Brightness2
+import androidx.compose.material.icons.filled.Info
+import androidx.compose.material.icons.filled.Palette
+import androidx.compose.material.icons.filled.Sync
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.painter.Painter
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.core.content.edit
+import androidx.preference.PreferenceManager
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.ColorPicker
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.util.ColorUtils
+import net.helcel.cowspent.util.Cowspent
+
+@Composable
+fun SettingsScreen(
+    onBack: () -> Unit,
+    onAccountSettingsClick: () -> Unit,
+    onAboutClick: () -> Unit,
+    onColorSelected: (Int) -> Unit,
+    onNightModeChanged: (String) -> Unit = {}
+) {
+    val context = LocalContext.current
+    val sharedPreferences = remember { PreferenceManager.getDefaultSharedPreferences(context) }
+
+    val keyNightMode = stringResource(R.string.pref_key_night_mode)
+    val valNightModeSystem = stringResource(R.string.pref_value_night_mode_system)
+    val valNightModeNo = stringResource(R.string.pref_value_night_mode_no)
+    val valNightModeYes = stringResource(R.string.pref_value_night_mode_yes)
+
+    val keyColorMode = stringResource(R.string.pref_key_color_mode)
+    val keyUseServerColor = stringResource(R.string.pref_key_use_server_color)
+    val keyUseSystemColor = stringResource(R.string.pref_key_use_system_color)
+    val keyColor = stringResource(R.string.pref_key_color)
+    val keyOfflineMode = stringResource(R.string.pref_key_offline_mode)
+    val keyShowArchived = stringResource(R.string.pref_key_show_archived)
+
+    // States for preferences
+    var nightMode by remember(keyNightMode) {
+        mutableStateOf(sharedPreferences.getString(keyNightMode, "-1") ?: "-1")
+    }
+
+    var colorMode by remember(keyColorMode, keyUseServerColor, keyUseSystemColor) {
+        mutableStateOf(sharedPreferences.getString(keyColorMode, null) ?: run {
+            val useServer = sharedPreferences.getBoolean(keyUseServerColor, true)
+            val useSystem = sharedPreferences.getBoolean(keyUseSystemColor, true)
+            when {
+                useServer -> "server"
+                useSystem -> "system"
+                else -> "manual"
+            }
+        })
+    }
+
+    // Apply theme globally only when leaving settings to avoid flickering/restarts during selection
+    DisposableEffect(nightMode) {
+        onDispose {
+            Cowspent.setAppTheme(nightMode.toInt())
+        }
+    }
+
+    var appColor by remember(keyColor) {
+        mutableIntStateOf(sharedPreferences.getInt(keyColor, Color.BLUE))
+    }
+    var offlineMode by remember(keyOfflineMode) {
+        mutableStateOf(sharedPreferences.getBoolean(keyOfflineMode, false))
+    }
+    var showArchived by remember(keyShowArchived) {
+        mutableStateOf(sharedPreferences.getBoolean(keyShowArchived, false))
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.action_settings)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.primary,
+                elevation = 0.dp
+            )
+        }
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .padding(padding)
+                .fillMaxSize()
+                .verticalScroll(rememberScrollState())
+        ) {
+            // Appearance
+            SettingsCategory(stringResource(R.string.settings_appearance_category))
+
+            SettingsSwitchPreference(
+                title = stringResource(R.string.setting_show_archived),
+                icon = Icons.Default.Archive,
+                checked = showArchived,
+                onCheckedChange = {
+                    showArchived = it
+                    sharedPreferences.edit {
+                        putBoolean(keyShowArchived, it)
+                        if (!it) {
+                            val selectedProjectId = sharedPreferences.getLong("selected_project", 0)
+                            if (selectedProjectId != 0L) {
+                                val db = CowspentSQLiteOpenHelper.getInstance(context)
+                                val project = db.getProject(selectedProjectId)
+                                if (project?.isArchived == true) {
+                                    putLong("selected_project", 0)
+                                }
+                            }
+                        }
+                    }
+                }
+            )
+
+            SettingsListPreference(
+                title = stringResource(R.string.settings_night_mode_title),
+                icon = Icons.Default.Brightness2,
+                value = nightMode,
+                entries = mapOf(
+                    valNightModeSystem to stringResource(R.string.pref_value_theme_system),
+                    valNightModeNo to stringResource(R.string.pref_value_theme_light),
+                    valNightModeYes to stringResource(R.string.pref_value_theme_dark)
+                ),
+                onValueChange = {
+                    nightMode = it
+                    sharedPreferences.edit {
+                        putString(keyNightMode, it)
+                    }
+                    onNightModeChanged(it)
+                }
+            )
+
+            SettingsListPreference(
+                title = stringResource(R.string.settings_color_mode_title),
+                icon = Icons.Default.Palette,
+                value = colorMode,
+                entries = mapOf(
+                    "system" to stringResource(R.string.pref_value_color_system),
+                    "server" to stringResource(R.string.pref_value_color_server),
+                    "manual" to stringResource(R.string.pref_value_color_manual)
+                ),
+                onValueChange = { mode ->
+                    colorMode = mode
+                    sharedPreferences.edit {
+                        putString(keyColorMode, mode)
+                        // Keep legacy flags in sync just in case
+                        putBoolean(keyUseServerColor, mode == "server")
+                        putBoolean(keyUseSystemColor, mode == "system")
+                    }
+                    if (mode == "server") {
+                        CowspentSQLiteOpenHelper.getInstance(context).cowspentServerSyncHelper.runAccountProjectsSync()
+                    }
+                    onColorSelected(ColorUtils.primaryColor(context))
+                }
+            )
+
+            if (colorMode == "manual") {
+                SettingsColorPreference(
+                    title = stringResource(R.string.settings_color_title),
+                    summary = stringResource(R.string.settings_color_summary),
+                    icon = Icons.Default.Palette,
+                    initialColor = appColor,
+                    onColorSelected = {
+                        appColor = it
+                        sharedPreferences.edit {
+                            putInt(keyColor, it)
+                        }
+                        onColorSelected(it)
+                    }
+                )
+            }
+
+            // Network
+            SettingsCategory(stringResource(R.string.settings_network_category))
+
+            SettingsSwitchPreference(
+                title = stringResource(R.string.settings_offline_mode_title),
+                summary = stringResource(R.string.settings_offline_mode_summary),
+                icon = Icons.Default.Sync,
+                checked = offlineMode,
+                onCheckedChange = {
+                    offlineMode = it
+                    sharedPreferences.edit {
+                        putBoolean(keyOfflineMode, it)
+                    }
+                }
+            )
+
+            SettingsPreference(
+                title = stringResource(R.string.settings_server_settings),
+                icon = Icons.Default.AccountCircle,
+                onClick = onAccountSettingsClick
+            )
+
+            // Other
+            SettingsCategory(stringResource(R.string.settings_other_category))
+
+            SettingsPreference(
+                title = stringResource(R.string.settings_about),
+                icon = Icons.Default.Info,
+                onClick = onAboutClick
+            )
+        }
+    }
+}
+
+@Composable
+fun SettingsCategory(title: String) {
+    Text(
+        text = title.uppercase(),
+        modifier = Modifier.padding(start = 16.dp, top = 16.dp, bottom = 8.dp),
+        color = MaterialTheme.colors.primary,
+        style = MaterialTheme.typography.overline,
+        fontWeight = FontWeight.Bold
+    )
+}
+
+@Composable
+fun SettingsPreference(
+    title: String,
+    summary: String? = null,
+    icon: Any? = null,
+    onClick: () -> Unit
+) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable(onClick = onClick)
+            .padding(16.dp, 8.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        SettingsIcon(icon)
+        Spacer(modifier = Modifier.width(32.dp))
+        Column {
+            Text(text = title, style = MaterialTheme.typography.subtitle1)
+            if (summary != null) {
+                Text(text = summary, style = MaterialTheme.typography.caption)
+            }
+        }
+    }
+}
+
+@Composable
+fun SettingsSwitchPreference(
+    title: String,
+    summary: String? = null,
+    icon: Any? = null,
+    checked: Boolean,
+    onCheckedChange: (Boolean) -> Unit
+) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { onCheckedChange(!checked) }
+            .padding(16.dp, 8.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        SettingsIcon(icon)
+        Spacer(modifier = Modifier.width(32.dp))
+        Column(modifier = Modifier.weight(1f)) {
+            Text(text = title, style = MaterialTheme.typography.subtitle1)
+            if (summary != null) {
+                Text(text = summary, style = MaterialTheme.typography.caption)
+            }
+        }
+        Switch(
+            checked = checked,
+            onCheckedChange = onCheckedChange,
+            colors = SwitchDefaults.colors(
+                uncheckedThumbColor = MaterialTheme.colors.onSurface
+            )
+        )
+    }
+}
+
+@Composable
+fun SettingsListPreference(
+    title: String,
+    icon: Any? = null,
+    value: String,
+    entries: Map<String, String>,
+    onValueChange: (String) -> Unit
+) {
+    var showDialog by remember { mutableStateOf(false) }
+
+    SettingsPreference(
+        title = title,
+        summary = entries[value],
+        icon = icon,
+        onClick = { showDialog = true }
+    )
+
+    if (showDialog) {
+        AlertDialog(
+            onDismissRequest = { showDialog = false },
+            title = { Text(title) },
+            text = {
+                Column {
+                    entries.forEach { (key, label) ->
+                        Row(
+                            Modifier.fillMaxWidth()
+                                .selectable(
+                                    selected = (key == value),
+                                    onClick = {
+                                        onValueChange(key)
+                                        showDialog = false
+                                    }
+                                ),
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            RadioButton(
+                                selected = (key == value),
+                                onClick = {
+                                    onValueChange(key)
+                                    showDialog = false
+                                }
+                            )
+                            Spacer(Modifier.width(8.dp))
+                            Text(text = label)
+                        }
+                    }
+                }
+            },
+            confirmButton = {
+                TextButton(onClick = { showDialog = false }) {
+                    Text(stringResource(R.string.simple_cancel))
+                }
+            }
+        )
+    }
+}
+
+@Composable
+fun SettingsColorPreference(
+    title: String,
+    summary: String? = null,
+    icon: Any? = null,
+    initialColor: Int,
+    onColorSelected: (Int) -> Unit
+) {
+    var showDialog by remember { mutableStateOf(false) }
+    var tempColor by remember { mutableIntStateOf(initialColor) }
+
+    SettingsPreference(
+        title = title,
+        summary = summary,
+        icon = icon,
+        onClick = {
+            tempColor = initialColor
+            showDialog = true
+        }
+    )
+
+    if (showDialog) {
+        AlertDialog(
+            onDismissRequest = { showDialog = false },
+            title = { Text(title) },
+            text = {
+                ColorPicker(initialColor = tempColor) {
+                    tempColor = it
+                }
+            },
+            confirmButton = {
+                TextButton(onClick = {
+                    onColorSelected(tempColor)
+                    showDialog = false
+                }) {
+                    Text(stringResource(R.string.simple_ok))
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = { showDialog = false }) {
+                    Text(stringResource(R.string.simple_cancel))
+                }
+            }
+        )
+    }
+}
+
+@Composable
+fun SettingsIcon(icon: Any?) {
+    Box(modifier = Modifier.size(24.dp), contentAlignment = Alignment.Center) {
+        when (icon) {
+            is ImageVector -> Icon(icon, contentDescription = null, tint = MaterialTheme.colors.onSurface.copy(alpha = 0.6f))
+            is Painter -> Icon(icon, contentDescription = null, tint = MaterialTheme.colors.onSurface.copy(alpha = 0.6f))
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun SettingsScreenPreview() {
+    MaterialTheme {
+        SettingsScreen(
+            onBack = {},
+            onAccountSettingsClick = {},
+            onAboutClick = {},
+            onColorSelected = {},
+            onNightModeChanged = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/statistics/ProjectSankeyDiagram.kt

@@ -0,0 +1,469 @@
+package net.helcel.cowspent.android.statistics
+
+import android.annotation.SuppressLint
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Group
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.CornerRadius
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.Path
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.compose.ui.res.stringResource
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.*
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBCategory
+import net.helcel.cowspent.model.DBMember
+import androidx.core.graphics.toColorInt
+
+@OptIn(ExperimentalMaterialApi::class)
+@SuppressLint("UseKtx")
+@Composable
+fun ProjectSankeyDiagram(
+    projectName: String,
+    allMembers: List<DBMember>,
+    allBills: List<DBBill>,
+    customCategories: List<DBCategory>,
+    onShareReady: (String) -> Unit
+) {
+    val shareStatsIntro = stringResource(R.string.share_stats_intro, projectName)
+
+    var selectedMemberId by remember { mutableLongStateOf(-1L) }
+    var expanded by remember { mutableStateOf(false) }
+
+    val activeBills = remember(allBills) {
+        allBills.filter { 
+            it.state != DBBill.STATE_DELETED && 
+            it.categoryRemoteId != DBBill.CATEGORY_REIMBURSEMENT 
+        }
+    }
+
+    val membersMap = remember(allMembers) { allMembers.associateBy { it.id } }
+    val categoriesMap = remember(customCategories) { customCategories.associateBy { it.remoteId.toInt() } }
+
+    if (activeBills.isEmpty()) {
+        Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+            Text("No data to display", style = MaterialTheme.typography.h6)
+        }
+        return
+    }
+
+    // Consolidated spending calculation
+    val spendings = remember(activeBills, selectedMemberId, membersMap) {
+        val spentMap = mutableMapOf<Long, Double>()
+        val catMap = mutableMapOf<Int, Double>()
+        membersMap.keys.forEach { spentMap[it] = 0.0 }
+        
+        activeBills.forEach { bill ->
+            val totalWeight = bill.billOwers.sumOf { bo -> 
+                membersMap[bo.memberId]?.weight ?: 1.0 
+            }
+            if (totalWeight > 0) {
+                if (selectedMemberId == -1L) {
+                    catMap[bill.categoryRemoteId] = (catMap[bill.categoryRemoteId] ?: 0.0) + bill.amount
+                    bill.billOwers.forEach { bo ->
+                        val weight = membersMap[bo.memberId]?.weight ?: 1.0
+                        val share = (bill.amount / totalWeight) * weight
+                        spentMap[bo.memberId] = (spentMap[bo.memberId] ?: 0.0) + share
+                    }
+                } else {
+                    bill.billOwers.find { it.memberId == selectedMemberId }?.let { bo ->
+                        val weight = membersMap[bo.memberId]?.weight ?: 1.0
+                        val share = (bill.amount / totalWeight) * weight
+                        catMap[bill.categoryRemoteId] = (catMap[bill.categoryRemoteId] ?: 0.0) + share
+                        spentMap[selectedMemberId] = (spentMap[selectedMemberId] ?: 0.0) + share
+                    }
+                }
+            }
+        }
+        
+        val memberList = spentMap.toList().filter { it.second > 0 }.sortedByDescending { it.second }
+        val categoryList = catMap.toList().sortedByDescending { it.second }
+        memberList to categoryList
+    }
+
+    val displayMemberSpendings = spendings.first
+    val displayCategorySpendings = spendings.second
+    val totalAmount = remember(displayMemberSpendings) { displayMemberSpendings.sumOf { it.second } }
+
+    LaunchedEffect(displayMemberSpendings, displayCategorySpendings, totalAmount, projectName) {
+        val statsText = StringBuilder()
+        statsText.append("// ").append(shareStatsIntro.replace("\n", "\n// ")).append("\n\n")
+
+        val middleNode = if (selectedMemberId == -1L) "Total" else "Spent"
+
+        displayMemberSpendings.forEach { (memberId, amount) ->
+            val name = membersMap[memberId]?.name ?: "???"
+            statsText.append("$name [${formatShortValue(amount)}] $middleNode\n")
+        }
+
+        statsText.append("\n")
+
+        displayCategorySpendings.forEach { (catRemoteId, amount) ->
+            val name = categoriesMap[catRemoteId]?.name ?: "Other"
+            statsText.append("$middleNode [${formatShortValue(amount)}] $name\n")
+        }
+
+        statsText.append("\n")
+
+        displayMemberSpendings.forEach { (memberId, _) ->
+            val member = membersMap[memberId]
+            if (member != null) {
+                val hexColor = String.format("#%02x%02x%02x", member.r ?: 128, member.g ?: 128, member.b ?: 128)
+                statsText.append(":${member.name} $hexColor\n")
+            }
+        }
+
+        displayCategorySpendings.forEach { (catRemoteId, _) ->
+            val category = categoriesMap[catRemoteId]
+            if (category != null) {
+                statsText.append(":${category.name ?: "Other"} ${category.color}\n")
+            }
+        }
+
+        onShareReady(statsText.toString())
+    }
+
+    Column(modifier = Modifier.fillMaxSize().padding(16.dp)) {
+        val selectedMember = membersMap[selectedMemberId]
+        EditableExposedDropdownMenu(
+            value = selectedMember?.name ?: "All Members",
+            placeholder = "Filter by member",
+            expanded = expanded,
+            onExpandedChange = { expanded = it },
+            onDismissRequest = { expanded = false },
+            modifier = Modifier.fillMaxWidth().padding(bottom = 16.dp),
+            leadingIcon = {
+                Box(modifier = Modifier.padding(start = 12.dp)) {
+                    if (selectedMember != null) {
+                        UserAvatar(
+                            name = selectedMember.name,
+                            r = selectedMember.r,
+                            g = selectedMember.g,
+                            b = selectedMember.b,
+                            disabled = !selectedMember.isActivated,
+                            size = 24.dp
+                        )
+                    } else {
+                        Icon(Icons.Default.Group, contentDescription = null)
+                    }
+                }
+            },
+            content = {
+                DropdownMenuItem(onClick = {
+                    selectedMemberId = -1L
+                    expanded = false
+                }) {
+                    Icon(Icons.Default.Group, contentDescription = null)
+                    Spacer(modifier = Modifier.width(12.dp))
+                    Text("All Members")
+                }
+                allMembers.forEach { member ->
+                    DropdownMenuItem(onClick = {
+                        selectedMemberId = member.id
+                        expanded = false
+                    }) {
+                        UserAvatar(
+                            name = member.name,
+                            r = member.r,
+                            g = member.g,
+                            b = member.b,
+                            disabled = !member.isActivated,
+                            size = 24.dp
+                        )
+                        Spacer(modifier = Modifier.width(12.dp))
+                        Text(member.name)
+                    }
+                }
+            }
+        )
+
+        if (totalAmount <= 0) {
+            Box(modifier = Modifier.weight(1f).fillMaxWidth(), contentAlignment = Alignment.Center) {
+                Text("No spending data for selected filter", style = MaterialTheme.typography.body1)
+            }
+        } else {
+            BoxWithConstraints(modifier = Modifier.weight(1f).fillMaxWidth()) {
+                val nodeHeightMember = 76.dp
+                val nodeHeightCategory = 76.dp
+                val nodeHeightTotal = 42.dp
+                val horizontalGap = 8.dp
+
+                val memberCount = displayMemberSpendings.size
+                val categoryCount = displayCategorySpendings.size
+
+                val maxGaps = maxOf(memberCount - 1, categoryCount - 1, 0)
+                val usableWidth = (maxWidth.value - horizontalGap.value * maxGaps).coerceAtLeast(0f)
+                val moneyScale = if (totalAmount > 0) usableWidth / totalAmount.toFloat() else 0f
+
+                Canvas(modifier = Modifier.fillMaxSize()) {
+                    val nodeHeightMemberPx = nodeHeightMember.toPx()
+                    val nodeHeightCategoryPx = nodeHeightCategory.toPx()
+                    val nodeHeightTotalPx = nodeHeightTotal.toPx()
+                    val gapPx = horizontalGap.toPx()
+
+                    val totalWidthPx = size.width
+                    val usableWidthPx = totalWidthPx - gapPx * maxGaps
+                    val moneyScalePx = if (totalAmount > 0) usableWidthPx / totalAmount else 0.0
+
+                    val totalNodeWidthPx = (totalAmount * moneyScalePx).toFloat()
+                    val totalNodeXPx = (totalWidthPx - totalNodeWidthPx) / 2
+
+                    val topY = 0f
+                    val middleY = (size.height - nodeHeightTotalPx) / 2
+                    val bottomY = size.height - nodeHeightCategoryPx
+
+                    val totalNodeColor = Color(0xFF333333)
+
+                    // Flows
+                    var currentXTop = (totalWidthPx - (totalAmount * moneyScalePx + (memberCount - 1).coerceAtLeast(0) * gapPx).toFloat()) / 2
+                    var currentXInTotalTop = totalNodeXPx
+                    displayMemberSpendings.forEach { (memberId, amount) ->
+                        val member = membersMap[memberId]
+                        val boxWidth = (amount * moneyScalePx).toFloat()
+                        val color = member?.let {
+                            Color(it.r ?: 128, it.g ?: 128, it.b ?: 128)
+                        } ?: Color.Gray
+
+                        if (boxWidth > 0.5f) {
+                            drawSankeyFlow(
+                                startX = currentXTop,
+                                startY = topY + nodeHeightMemberPx * 0.5f,
+                                startWidth = boxWidth,
+                                endX = currentXInTotalTop,
+                                endY = middleY + nodeHeightTotalPx * 0.5f,
+                                endWidth = boxWidth,
+                                startColor = color.copy(alpha = 0.5f),
+                                endColor = totalNodeColor.copy(alpha = 0.35f)
+                            )
+                        }
+                        currentXTop += boxWidth + gapPx
+                        currentXInTotalTop += boxWidth
+                    }
+
+                    var currentXBottom = (totalWidthPx - (totalAmount * moneyScalePx + (categoryCount - 1).coerceAtLeast(0) * gapPx).toFloat()) / 2
+                    var currentXInTotalBottom = totalNodeXPx
+                    displayCategorySpendings.forEach { (catRemoteId, amount) ->
+                        val category = categoriesMap[catRemoteId]
+                        val boxWidth = (amount * moneyScalePx).toFloat()
+                        val color = category?.color?.let {
+                            try { Color(it.toColorInt()) } catch (_: Exception) { Color(0xFF999999) }
+                        } ?: Color(0xFF999999)
+
+                        if (boxWidth > 0.5f) {
+                            drawSankeyFlow(
+                                startX = currentXInTotalBottom,
+                                startY = middleY + nodeHeightTotalPx * 0.5f,
+                                startWidth = boxWidth,
+                                endX = currentXBottom,
+                                endY = bottomY + nodeHeightCategoryPx * 0.5f,
+                                endWidth = boxWidth,
+                                startColor = totalNodeColor.copy(alpha = 0.35f),
+                                endColor = color.copy(alpha = 0.5f)
+                            )
+                        }
+                        currentXInTotalBottom += boxWidth
+                        currentXBottom += boxWidth + gapPx
+                    }
+
+                    // Nodes
+                    currentXTop = (totalWidthPx - (totalAmount * moneyScalePx + (memberCount - 1).coerceAtLeast(0) * gapPx).toFloat()) / 2
+                    displayMemberSpendings.forEach { (memberId, amount) ->
+                        val member = membersMap[memberId]
+                        val width = (amount * moneyScalePx).toFloat()
+                        val color = member?.let {
+                            Color(it.r ?: 128, it.g ?: 128, it.b ?: 128)
+                        } ?: Color.Gray
+
+                        if (width > 0.5f) {
+                            drawRoundRect(
+                                color = color,
+                                topLeft = Offset(currentXTop, topY),
+                                size = Size(width, nodeHeightMemberPx),
+                                cornerRadius = CornerRadius(10.dp.toPx())
+                            )
+                        }
+                        currentXTop += width + gapPx
+                    }
+
+                    drawRect(
+                        color = totalNodeColor,
+                        topLeft = Offset(totalNodeXPx, middleY),
+                        size = Size(totalNodeWidthPx, nodeHeightTotalPx)
+                    )
+
+                    currentXBottom = (totalWidthPx - (totalAmount * moneyScalePx + (categoryCount - 1).coerceAtLeast(0) * gapPx).toFloat()) / 2
+                    displayCategorySpendings.forEach { (catRemoteId, amount) ->
+                        val category = categoriesMap[catRemoteId]
+                        val width = (amount * moneyScalePx).toFloat()
+                        val color = category?.color?.let {
+                            try { Color(it.toColorInt()) } catch (_: Exception) { Color(0xFF999999) }
+                        } ?: Color(0xFF999999)
+                        
+                        if (width > 0.5f) {
+                            drawRoundRect(
+                                color = color,
+                                topLeft = Offset(currentXBottom, bottomY),
+                                size = Size(width, nodeHeightCategoryPx),
+                                cornerRadius = CornerRadius(10.dp.toPx())
+                            )
+                        }
+                        currentXBottom += width + gapPx
+                    }
+                }
+
+                // Member labels
+                var currentXTopLabel = (maxWidth.value - (totalAmount.toFloat() * moneyScale + (memberCount - 1).coerceAtLeast(0) * horizontalGap.value)) / 2
+                displayMemberSpendings.forEach { (memberId, amount) ->
+                    val member = membersMap[memberId]
+                    val widthValue = amount.toFloat() * moneyScale
+                    val width = widthValue.dp
+                    if (widthValue > 12f) {
+                        Box(
+                            modifier = Modifier
+                                .offset(x = currentXTopLabel.dp, y = 0.dp)
+                                .size(width, nodeHeightMember),
+                            contentAlignment = Alignment.Center
+                        ) {
+                            if (width >= 36.dp) {
+                                Column(
+                                    horizontalAlignment = Alignment.CenterHorizontally
+                                ) {
+                                    Text(
+                                        text = member?.name ?: "???",
+                                        fontSize = 16.sp,
+                                        color = Color.White,
+                                        maxLines = 1,
+                                        overflow = TextOverflow.Ellipsis,
+                                        fontWeight = FontWeight.Bold
+                                    )
+                                    Text(
+                                        text = formatShortValue(amount),
+                                        fontSize = 14.sp,
+                                        color = Color.White.copy(alpha = 0.9f)
+                                    )
+                                }
+                            }
+                        }
+                    }
+                    currentXTopLabel += widthValue + horizontalGap.value
+                }
+
+                // Total label
+                Box(
+                    modifier = Modifier
+                        .align(Alignment.Center)
+                        .fillMaxWidth()
+                        .height(nodeHeightTotal),
+                    contentAlignment = Alignment.Center
+                ) {
+                    Text(
+                        text = if (selectedMemberId == -1L) formatShortValue(totalAmount) else "SPENT: ${formatShortValue(totalAmount)}",
+                        fontSize = 16.sp,
+                        color = Color.White,
+                        textAlign = TextAlign.Center,
+                        fontWeight = FontWeight.ExtraBold
+                    )
+                }
+
+                // Category labels
+                var currentXBottomLabel = (maxWidth.value - (totalAmount.toFloat() * moneyScale + (categoryCount - 1).coerceAtLeast(0) * horizontalGap.value)) / 2
+                displayCategorySpendings.forEach { (catRemoteId, amount) ->
+                    val category = categoriesMap[catRemoteId]
+                    val widthValue = amount.toFloat() * moneyScale
+                    val width = widthValue.dp
+                    if (widthValue > 12f) {
+                        Box(
+                            modifier = Modifier
+                                .align(Alignment.BottomStart)
+                                .offset(x = currentXBottomLabel.dp)
+                                .size(width, nodeHeightCategory),
+                            contentAlignment = Alignment.Center
+                        ) {
+                            Column(
+                                horizontalAlignment = Alignment.CenterHorizontally
+                            ) {
+                                Text(
+                                    text = category?.icon ?: "❔",
+                                    fontSize = 20.sp
+                                )
+                                if (width >= 32.dp) {
+                                    Text(
+                                        text = formatShortValue(amount),
+                                        fontSize = 14.sp,
+                                        color = Color.White.copy(alpha = 0.9f)
+                                    )
+                                }
+                            }
+                        }
+                    }
+                    currentXBottomLabel += widthValue + horizontalGap.value
+                }
+            }
+        }
+        Spacer(Modifier.fillMaxWidth().height(32.dp))
+    }
+}
+
+private fun DrawScope.drawSankeyFlow(
+    startX: Float,
+    startY: Float,
+    startWidth: Float,
+    endX: Float,
+    endY: Float,
+    endWidth: Float,
+    startColor: Color,
+    endColor: Color
+) {
+    val path = Path().apply {
+        moveTo(startX, startY)
+        cubicTo(
+            startX, startY + (endY - startY) * 0.5f,
+            endX, endY - (endY - startY) * 0.5f,
+            endX, endY
+        )
+        lineTo(endX + endWidth, endY)
+        cubicTo(
+            endX + endWidth, endY - (endY - startY) * 0.5f,
+            startX + startWidth, startY + (endY - startY) * 0.5f,
+            startX + startWidth, startY
+        )
+        close()
+    }
+    drawPath(
+        path = path,
+        brush = Brush.verticalGradient(
+            colors = listOf(startColor, endColor),
+            startY = startY,
+            endY = endY
+        )
+    )
+}
+
+@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+@Composable
+fun ProjectSankeyDiagramPreview() {
+    MaterialTheme {
+        ProjectSankeyDiagram(
+            projectName = "Test Project",
+            allMembers = StatisticsMockData.members,
+            allBills = StatisticsMockData.bills,
+            customCategories = emptyList(),
+            onShareReady = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/statistics/ProjectSpendingGraph.kt

@@ -0,0 +1,436 @@
+package net.helcel.cowspent.android.statistics
+
+import androidx.compose.foundation.*
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ShowChart
+import androidx.compose.material.icons.filled.Timeline
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.CornerRadius
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.*
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.platform.LocalLocale
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.formatShortValue
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBMember
+import java.text.SimpleDateFormat
+import java.util.*
+import kotlin.math.max
+
+enum class SpendingTimeView(val label: String) {
+    WEEKLY("Weekly"),
+    MONTHLY("Monthly"),
+    YEARLY("Yearly")
+}
+
+@Composable
+fun ProjectSpendingGraph(
+    projectName: String,
+    allMembers: List<DBMember>,
+    allBills: List<DBBill>,
+    onShareReady: (String) -> Unit
+) {
+    val shareStatsIntro = stringResource(R.string.share_stats_intro, projectName)
+    if (allBills.isEmpty()) {
+        Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+            Text("No data to display", style = MaterialTheme.typography.h6)
+        }
+        return
+    }
+
+    var timeView by remember { mutableStateOf(SpendingTimeView.MONTHLY) }
+    var showTotal by remember { mutableStateOf(false) }
+    var showMovingAverage by remember { mutableStateOf(true) }
+
+    val sortedBills = remember(allBills) { allBills.sortedBy { it.timestamp } }
+    val projectMaxTimestamp = sortedBills.last().timestamp
+
+    // Period generation logic
+    val periods = remember(timeView, sortedBills.first().timestamp, projectMaxTimestamp) {
+        val cal = Calendar.getInstance()
+        cal.timeInMillis = sortedBills.first().timestamp * 1000
+        cal.set(Calendar.HOUR_OF_DAY, 0)
+        cal.set(Calendar.MINUTE, 0)
+        cal.set(Calendar.SECOND, 0)
+        cal.set(Calendar.MILLISECOND, 0)
+
+        when (timeView) {
+            SpendingTimeView.WEEKLY -> cal.set(Calendar.DAY_OF_WEEK, cal.firstDayOfWeek)
+            SpendingTimeView.MONTHLY -> cal.set(Calendar.DAY_OF_MONTH, 1)
+            SpendingTimeView.YEARLY -> cal.set(Calendar.DAY_OF_YEAR, 1)
+        }
+        
+        val list = mutableListOf<Long>()
+        val endLimit = projectMaxTimestamp * 1000
+        while (cal.timeInMillis <= endLimit) {
+            list.add(cal.timeInMillis / 1000)
+            when (timeView) {
+                SpendingTimeView.WEEKLY -> cal.add(Calendar.WEEK_OF_YEAR, 1)
+                SpendingTimeView.MONTHLY -> cal.add(Calendar.MONTH, 1)
+                SpendingTimeView.YEARLY -> cal.add(Calendar.YEAR, 1)
+            }
+        }
+        list
+    }
+
+    // Consolidated spending data calculation
+    val chartData = remember(allMembers, sortedBills, periods, showTotal) {
+        val memberSpending = mutableMapOf<Long, List<Double>>()
+        allMembers.forEach { member ->
+            val spending = mutableListOf<Double>()
+            for (i in periods.indices) {
+                val start = periods[i]
+                val end = if (i + 1 < periods.size) periods[i + 1] else Long.MAX_VALUE
+                val amount = sortedBills.asSequence()
+                    .filter { it.timestamp in start..<end && it.payerId == member.id }
+                    .sumOf { it.amount }
+                spending.add(amount)
+            }
+            memberSpending[member.id] = spending
+        }
+
+        // EMA Trend Line calculation
+        val alpha = 0.7 
+        var lastEma = 0.0
+        val trend = periods.indices.map { i ->
+            val totalInPeriod = allMembers.sumOf { memberSpending[it.id]?.get(i) ?: 0.0 }
+            val currentMetric = if (showTotal) totalInPeriod else totalInPeriod / allMembers.size.coerceAtLeast(1)
+            lastEma = if (i == 0) currentMetric else alpha * currentMetric + (1 - alpha) * lastEma
+            lastEma
+        }
+
+        val maxBar = if (showTotal) {
+            periods.indices.maxOfOrNull { i ->
+                allMembers.sumOf { memberSpending[it.id]?.get(i) ?: 0.0 }
+            } ?: 1.0
+        } else {
+            periods.indices.maxOfOrNull { i ->
+                allMembers.maxOfOrNull { memberSpending[it.id]?.get(i) ?: 0.0 } ?: 0.0
+            } ?: 1.0
+        }
+        val maxVal = maxOf(maxBar, trend.maxOrNull() ?: 0.0).coerceAtLeast(1.0)
+
+        Triple(memberSpending, trend, maxVal)
+    }
+
+    val memberSpendingByPeriod = chartData.first
+    val trendLine = chartData.second
+    val maxSpendingInPeriod = chartData.third
+
+    LaunchedEffect(memberSpendingByPeriod, periods, timeView, projectName) {
+        val statsText = StringBuilder()
+        statsText.append(shareStatsIntro).append("\n\n")
+        statsText.append("Spending Trend (${timeView.label}):\n")
+        periods.indices.forEach { i ->
+            val timestamp = periods[i]
+            val dateStr = SimpleDateFormat("yyyy-MM-dd", Locale.ROOT).format(Date(timestamp * 1000))
+            val total = allMembers.sumOf { memberSpendingByPeriod[it.id]?.get(i) ?: 0.0 }
+            if (total > 0) {
+                statsText.append("- $dateStr: ${total.toInt()}\n")
+            }
+        }
+        val grandTotal = allMembers.sumOf { m -> memberSpendingByPeriod[m.id]?.sum() ?: 0.0 }
+        statsText.append("\nTotal: ${grandTotal.toInt()}")
+        onShareReady(statsText.toString())
+    }
+
+    Column(modifier = Modifier.padding(16.dp).fillMaxSize()) {
+        Card(
+            elevation = 4.dp,
+            shape = MaterialTheme.shapes.medium,
+            modifier = Modifier.weight(1f).fillMaxWidth()
+        ) {
+            BoxWithConstraints(modifier = Modifier.fillMaxSize().padding(12.dp)) {
+                val totalAvailableWidth = constraints.maxWidth.toFloat()
+                val totalHeight = constraints.maxHeight.toFloat()
+                
+                val yAxisWidth = 44.dp
+                val xAxisHeight = 32.dp
+                
+                val density = LocalDensity.current
+                val yAxisWidthPx = with(density) { yAxisWidth.toPx() }
+                val xAxisHeightPx = with(density) { xAxisHeight.toPx() }
+                
+                val chartHeight = totalHeight - xAxisHeightPx
+
+                // Y-Axis Labels
+                Box(modifier = Modifier.width(yAxisWidth).height(with(density) { chartHeight.toDp() })) {
+                    for (i in 0..5) {
+                        val value = (i.toFloat() / 5) * maxSpendingInPeriod
+                        val yOffset = chartHeight - (i.toFloat() / 5) * chartHeight
+                        Text(
+                            text = formatShortValue(value),
+                            fontSize = 10.sp,
+                            color = Color.Gray,
+                            textAlign = TextAlign.End,
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .offset(y = with(density) { (yOffset - 6.sp.toPx()).toDp() })
+                                .padding(end = 8.dp)
+                        )
+                    }
+                }
+
+                val scrollState = rememberScrollState()
+                LaunchedEffect(scrollState.maxValue) {
+                    if (scrollState.maxValue > 0) {
+                        scrollState.scrollTo(scrollState.maxValue)
+                    }
+                }
+                val minPeriodWidth = when(timeView) {
+                    SpendingTimeView.WEEKLY -> 48.dp
+                    SpendingTimeView.MONTHLY -> 72.dp
+                    SpendingTimeView.YEARLY -> 110.dp
+                }
+                val contentWidth = max(totalAvailableWidth - yAxisWidthPx, with(density) { periods.size * minPeriodWidth.toPx() })
+
+                Box(
+                    modifier = Modifier
+                        .offset(x = yAxisWidth)
+                        .width(with(density) { (totalAvailableWidth - yAxisWidthPx).toDp() })
+                        .horizontalScroll(scrollState)
+                ) {
+                    Column(modifier = Modifier.width(with(density) { contentWidth.toDp() })) {
+                        // Chart area
+                        val primaryColor = MaterialTheme.colors.primary
+                        Canvas(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .height(with(density) { chartHeight.toDp() })
+                        ) {
+                            val gridColor = Color.Gray.copy(alpha = 0.15f)
+                            for (i in 0..5) {
+                                val y = size.height - (i.toFloat() / 5) * size.height
+                                drawLine(
+                                    color = gridColor,
+                                    start = Offset(0f, y),
+                                    end = Offset(size.width, y),
+                                    strokeWidth = 1.dp.toPx()
+                                )
+                            }
+
+                            val fullWidthPerPeriod = size.width / periods.size
+                            val groupWidth = fullWidthPerPeriod * 0.75f
+                            val groupSpacing = fullWidthPerPeriod * 0.25f
+                            
+                            periods.indices.forEach { i ->
+                                if (showTotal) {
+                                    val totalAmount = allMembers.sumOf { memberSpendingByPeriod[it.id]?.get(i) ?: 0.0 }
+                                    if (totalAmount > 0) {
+                                        val barHeight = (totalAmount.toFloat() / maxSpendingInPeriod.toFloat()) * size.height
+                                        val x = i * fullWidthPerPeriod + groupSpacing / 2
+                                        drawRoundRect(
+                                            color = primaryColor.copy(alpha = 0.8f),
+                                            topLeft = Offset(x, size.height - barHeight),
+                                            size = Size(groupWidth, barHeight),
+                                            cornerRadius = CornerRadius(4.dp.toPx(), 4.dp.toPx())
+                                        )
+                                    }
+                                } else {
+                                    val activeMembers = allMembers.filter { (memberSpendingByPeriod[it.id]?.get(i) ?: 0.0) > 0 }
+                                    if (activeMembers.isNotEmpty()) {
+                                        val memberBarWidth = groupWidth / allMembers.size
+                                        val groupStartX = i * fullWidthPerPeriod + groupSpacing / 2
+                                        val totalActiveWidth = activeMembers.size * memberBarWidth
+                                        val centeringOffset = (groupWidth - totalActiveWidth) / 2
+
+                                        activeMembers.forEachIndexed { activeIndex, member ->
+                                            val amount = memberSpendingByPeriod[member.id]!![i]
+                                            val barHeight = (amount.toFloat() / maxSpendingInPeriod.toFloat()) * size.height
+                                            val x = groupStartX + centeringOffset + activeIndex * memberBarWidth
+                                            
+                                            drawRoundRect(
+                                                color = Color(android.graphics.Color.rgb(member.r ?: 0, member.g ?: 0, member.b ?: 0)),
+                                                topLeft = Offset(x, size.height - barHeight),
+                                                size = Size(memberBarWidth * 0.85f, barHeight),
+                                                cornerRadius = CornerRadius(2.dp.toPx(), 2.dp.toPx())
+                                            )
+                                        }
+                                    }
+                                }
+                            }
+
+                            if (showMovingAverage && periods.isNotEmpty()) {
+                                val linePath = Path()
+                                trendLine.forEachIndexed { i, value ->
+                                    val x = i * fullWidthPerPeriod + fullWidthPerPeriod / 2f
+                                    val y = size.height - (value.toFloat() / maxSpendingInPeriod.toFloat()) * size.height
+                                    
+                                    if (i == 0) {
+                                        linePath.moveTo(x, y)
+                                    } else {
+                                        val prevX = (i - 1) * fullWidthPerPeriod + fullWidthPerPeriod / 2f
+                                        val prevY = size.height - (trendLine[i-1].toFloat() / maxSpendingInPeriod.toFloat()) * size.height
+                                        linePath.cubicTo(
+                                            prevX + (x - prevX) / 2f, prevY,
+                                            prevX + (x - prevX) / 2f, y,
+                                            x, y
+                                        )
+                                    }
+                                }
+                                drawPath(
+                                    path = linePath,
+                                    color = primaryColor,
+                                    style = Stroke(
+                                        width = 2.5.dp.toPx(),
+                                        cap = StrokeCap.Round,
+                                        join = StrokeJoin.Round
+                                    )
+                                )
+                            }
+                        }
+                        
+                        Box(modifier = Modifier.fillMaxWidth().height(xAxisHeight)) {
+                            val locale = LocalLocale.current.platformLocale
+                            val labelIndices = when(timeView) {
+                                SpendingTimeView.YEARLY -> periods.indices.toList()
+                                SpendingTimeView.MONTHLY -> periods.indices.filter { it % 2 == 0 || it == periods.size - 1 }
+                                SpendingTimeView.WEEKLY -> periods.indices.filter { it % 4 == 0 || it == periods.size - 1 }
+                            }
+
+                            labelIndices.forEach { index ->
+                                val timestamp = periods[index]
+                                val cal = Calendar.getInstance().apply { timeInMillis = timestamp * 1000 }
+                                val dateStr = when (timeView) {
+                                    SpendingTimeView.WEEKLY -> {
+                                        val week = cal.get(Calendar.WEEK_OF_YEAR)
+                                        val year = cal.get(Calendar.YEAR) % 100
+                                        String.format(Locale.ROOT, "%02d/%02d", week, year)
+                                    }
+                                    SpendingTimeView.MONTHLY -> SimpleDateFormat("MM/yy", locale).format(Date(timestamp * 1000))
+                                    SpendingTimeView.YEARLY -> "${cal.get(Calendar.YEAR)}"
+                                }
+                                val fullWidthPerPeriod = contentWidth / periods.size
+                                val xPosition = index * fullWidthPerPeriod + (fullWidthPerPeriod / 2)
+                                Text(
+                                    text = dateStr,
+                                    fontSize = 10.sp,
+                                    color = Color.Gray,
+                                    textAlign = TextAlign.Center,
+                                    modifier = Modifier
+                                        .offset(x = with(density) { (xPosition - 40.dp.toPx()).toDp() })
+                                        .width(80.dp)
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Box(
+                modifier = Modifier
+                    .background(Color.Black.copy(alpha = 0.05f), MaterialTheme.shapes.medium)
+                    .border(1.dp, Color.Black.copy(alpha = 0.1f), MaterialTheme.shapes.medium)
+            ) {
+                Row(modifier = Modifier.padding(4.dp)) {
+                    SpendingTimeView.entries.forEach { view ->
+                        val isSelected = timeView == view
+                        Box(
+                            modifier = Modifier
+                                .background(
+                                    color = if (isSelected) MaterialTheme.colors.primary else Color.Transparent,
+                                    shape = MaterialTheme.shapes.medium
+                                )
+                                .clickable { timeView = view }
+                                .padding(horizontal = 12.dp, vertical = 6.dp)
+                        ) {
+                            Text(
+                                text = view.label,
+                                fontSize = 12.sp,
+                                color = if (isSelected) MaterialTheme.colors.onPrimary else Color.Gray,
+                                fontWeight = if (isSelected) FontWeight.Bold else FontWeight.Normal
+                            )
+                        }
+                    }
+                }
+            }
+
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                IconButton(onClick = { showMovingAverage = !showMovingAverage }) {
+                    Icon(
+                        if (showMovingAverage) Icons.Default.Timeline else Icons.AutoMirrored.Filled.ShowChart,
+                        contentDescription = "Trend",
+                        tint = if (showMovingAverage) MaterialTheme.colors.primary else Color.Gray
+                    )
+                }
+                Spacer(Modifier.width(4.dp))
+                Text("Total", style = MaterialTheme.typography.caption, color = Color.Gray)
+                Switch(
+                    checked = showTotal,
+                    onCheckedChange = { showTotal = it },
+                    colors = SwitchDefaults.colors(checkedThumbColor = MaterialTheme.colors.primary)
+                )
+            }
+        }
+
+        Spacer(modifier = Modifier.height(16.dp))
+        
+        if (!showTotal) {
+            val scrollState = rememberScrollState()
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .heightIn(max = 100.dp)
+                    .verticalScroll(scrollState)
+            ) {
+                allMembers.chunked(3).forEach { rowMembers ->
+                    Row(modifier = Modifier.fillMaxWidth()) {
+                        rowMembers.forEach { member ->
+                            Row(
+                                verticalAlignment = Alignment.CenterVertically,
+                                modifier = Modifier.weight(1f).padding(bottom = 8.dp)
+                            ) {
+                                Box(
+                                    modifier = Modifier
+                                        .size(12.dp)
+                                        .background(
+                                            Color(android.graphics.Color.rgb(member.r ?: 0, member.g ?: 0, member.b ?: 0)),
+                                            shape = MaterialTheme.shapes.small
+                                        )
+                                )
+                                Spacer(modifier = Modifier.width(8.dp))
+                                Text(member.name, fontSize = 12.sp, maxLines = 1)
+                            }
+                        }
+                        if (rowMembers.size == 1) Spacer(modifier = Modifier.weight(1f))
+                    }
+                }
+            }
+        }
+    }
+}
+
+
+@Preview(showBackground = true)
+@Composable
+fun ProjectSpendingGraphPreview() {
+    MaterialTheme {
+        ProjectSpendingGraph(
+            projectName = "Test Project",
+            allMembers = StatisticsMockData.members,
+            allBills = StatisticsMockData.bills,
+            onShareReady = {}
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/android/statistics/ProjectStatisticsActivity.kt

@@ -0,0 +1,56 @@
+package net.helcel.cowspent.android.statistics
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.compose.setContent
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.theme.ThemeUtils
+
+class ProjectStatisticsActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val projectId = intent.getLongExtra(EXTRA_PROJECT_ID, -1L)
+        if (projectId == -1L) {
+            finish()
+            return
+        }
+
+        val db = CowspentSQLiteOpenHelper.getInstance(this)
+        
+        lifecycleScope.launch {
+            val proj = withContext(Dispatchers.IO) { db.getProject(projectId) }
+            if (proj == null) {
+                finish()
+                return@launch
+            }
+
+            setContent {
+                ThemeUtils.CowspentTheme {
+                    ProjectStatisticsScreen(
+                        proj = proj,
+                        db = db,
+                        onBack = { finish() }
+                    )
+                }
+            }
+        }
+    }
+
+    companion object {
+        private const val EXTRA_PROJECT_ID = "extra_project_id"
+
+        fun createIntent(context: Context, projectId: Long): Intent {
+            return Intent(context, ProjectStatisticsActivity::class.java).apply {
+                putExtra(EXTRA_PROJECT_ID, projectId)
+            }
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/android/statistics/ProjectStatisticsPreview.kt

@@ -0,0 +1,48 @@
+package net.helcel.cowspent.android.statistics
+
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBBillOwer
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.model.DBProject
+import net.helcel.cowspent.model.ProjectType
+
+object StatisticsMockData {
+    val project = DBProject(
+        id = 1L,
+        remoteId = "vacation",
+        password = "",
+        name = "Vacation 2024",
+        serverUrl = null,
+        email = null,
+        lastPayerId = 1L,
+        type = ProjectType.LOCAL,
+        lastSyncedTimestamp = null,
+        currencyName = "EUR",
+        isDeletionDisabled = false,
+        myAccessLevel = 4,
+        bearerToken = null,
+        archivedTs = null
+    )
+
+    val members = listOf(
+        DBMember(1L, 0, 1L, "Alice", true, 1.0, 0, 255, 100, 100, null, null),
+        DBMember(2L, 0, 1L, "Bob", true, 1.0, 0, 100, 255, 100, null, null),
+        DBMember(3L, 0, 1L, "Charlie", true, 1.0, 0, 100, 100, 255, null, null)
+    )
+
+    val bills = listOf(
+        DBBill(1L, 0, 1L, 1L, 120.5, System.currentTimeMillis() / 1000 - 86400 * 10, "Hotel", 0, null, null, -13, "", -1).apply {
+            billOwers = listOf(DBBillOwer(1L, 1L, 1L), DBBillOwer(2L, 1L, 2L), DBBillOwer(3L, 1L, 3L))
+        },
+        DBBill(2L, 0, 1L, 2L, 50.0, System.currentTimeMillis() / 1000 - 86400 * 8, "Groceries", 0, null, null, -1, "", -2).apply {
+            billOwers = listOf(DBBillOwer(4L, 2L, 1L), DBBillOwer(5L, 2L, 2L), DBBillOwer(6L, 2L, 3L))
+        },
+        DBBill(3L, 0, 1L, 3L, 1.0, System.currentTimeMillis() / 1000 - 86400 * 5, "Gas", 0, null, null, -14, "", -1).apply {
+            billOwers = listOf(DBBillOwer(7L, 3L, 1L), DBBillOwer(8L, 3L, 2L), DBBillOwer(9L, 3L, 3L))
+        },
+        DBBill(4L, 0, 1L, 1L, 30.0, System.currentTimeMillis() / 1000 - 86400 * 2, "Dinner", 0, null, null, -12, "", -2).apply {
+            billOwers = listOf(DBBillOwer(10L, 4L, 1L), DBBillOwer(11L, 4L, 2L))
+        }
+    )
+}
+

app/src/main/java/net/helcel/cowspent/android/statistics/ProjectStatisticsScreen.kt

@@ -0,0 +1,155 @@
+package net.helcel.cowspent.android.statistics
+
+import android.content.Intent
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Share
+import androidx.compose.runtime.*
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.Alignment
+import androidx.core.content.edit
+import androidx.preference.PreferenceManager
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.*
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.util.CategoryUtils
+
+@Composable
+fun ProjectStatisticsScreen(
+    proj: DBProject,
+    db: CowspentSQLiteOpenHelper,
+    onBack: () -> Unit
+) {
+    val context = LocalContext.current
+    val prefs = remember { PreferenceManager.getDefaultSharedPreferences(context) }
+    var selectedTab by rememberSaveable {
+        mutableIntStateOf(prefs.getInt("last_statistics_tab", 0))
+    }
+    var currentShareText by remember { mutableStateOf("") }
+    val tabs = listOf(
+        stringResource(R.string.statistic_title),
+        "Trend",
+        "Sankey"
+    )
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.statistic_title)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = null)
+                    }
+                },
+                actions = {
+                    IconButton(onClick = {
+                        if (currentShareText.isNotEmpty()) {
+                            val sendIntent = Intent().apply {
+                                action = Intent.ACTION_SEND
+                                putExtra(Intent.EXTRA_TEXT, currentShareText)
+                                type = "text/plain"
+                            }
+                            context.startActivity(Intent.createChooser(sendIntent, null))
+                        }
+                    }) {
+                        Icon(Icons.Default.Share, contentDescription = "Share")
+                    }
+                },
+                backgroundColor = MaterialTheme.colors.primary,
+                elevation = 0.dp
+            )
+        }
+    ) { padding ->
+        Column(modifier = Modifier.padding(padding).fillMaxSize()) {
+            TabRow(selectedTabIndex = selectedTab) {
+                tabs.forEachIndexed { index, title ->
+                    Tab(
+                        selected = selectedTab == index,
+                        onClick = {
+                            selectedTab = index
+                            prefs.edit { putInt("last_statistics_tab", index) }
+                        },
+                        text = { Text(title) }
+                    )
+                }
+            }
+            
+            val statsData by produceState<StatisticsData?>(null, proj.id) {
+                value = withContext(Dispatchers.IO) {
+                    val members = db.getMembersOfProject(proj.id, null)
+                    val bills = db.getBillsOfProject(proj.id)
+                    val categories = db.getCategories(proj.id)
+                    val paymentModes = db.getPaymentModes(proj.id)
+                    StatisticsData(members, bills, categories, paymentModes)
+                }
+            }
+
+            if (statsData != null) {
+                val data = statsData!!
+                val defaultCategories = remember(proj.id) { CategoryUtils.getDefaultCategories(context, proj.id) }
+                val categories = remember(proj.type, data.categories, defaultCategories) {
+                    val hardcoded = if (proj.type == ProjectType.LOCAL) {
+                        defaultCategories
+                    } else {
+                        listOfNotNull(defaultCategories.find { it.remoteId.toInt() == DBBill.CATEGORY_REIMBURSEMENT })
+                    }
+                    (data.categories + hardcoded).distinctBy { it.remoteId }
+                }
+                val categoryNoneLabel = stringResource(R.string.category_none)
+                val sankeyCategories = remember(proj.id, data.categories, defaultCategories, categoryNoneLabel) {
+                    val noneCategory = DBCategory(0, 0, proj.id, categoryNoneLabel, "❌", "#9E9E9E")
+                    (data.categories + defaultCategories + noneCategory).distinctBy { it.remoteId }
+                }
+
+                when (selectedTab) {
+                    0 -> {
+                        ProjectStatisticsTable(
+                            proj = proj,
+                            allMembers = data.members,
+                            allBills = data.bills,
+                            customCategories = categories,
+                            customPaymentModes = data.paymentModes,
+                            onShareReady = { currentShareText = it }
+                        )
+                    }
+                    1 -> {
+                        ProjectSpendingGraph(
+                            projectName = proj.name.ifEmpty { proj.remoteId },
+                            allMembers = data.members,
+                            allBills = data.bills,
+                            onShareReady = { currentShareText = it }
+                        )
+                    }
+                    2 -> {
+                        ProjectSankeyDiagram(
+                            projectName = proj.name.ifEmpty { proj.remoteId },
+                            allMembers = data.members,
+                            allBills = data.bills,
+                            customCategories = sankeyCategories,
+                            onShareReady = { currentShareText = it }
+                        )
+                    }
+                }
+            } else {
+                Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                    CircularProgressIndicator()
+                }
+            }
+        }
+    }
+}
+
+data class StatisticsData(
+    val members: List<DBMember>,
+    val bills: List<DBBill>,
+    val categories: List<DBCategory>,
+    val paymentModes: List<DBPaymentMode>
+)

app/src/main/java/net/helcel/cowspent/android/statistics/ProjectStatisticsTable.kt

@@ -0,0 +1,390 @@
+package net.helcel.cowspent.android.statistics
+
+import android.app.DatePickerDialog
+import android.content.Context
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.colorResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import net.helcel.cowspent.R
+import net.helcel.cowspent.android.helper.*
+import net.helcel.cowspent.model.*
+import net.helcel.cowspent.util.CategoryUtils
+import net.helcel.cowspent.util.SupportUtil
+import java.text.SimpleDateFormat
+import java.util.*
+import kotlin.math.abs
+import kotlin.math.round
+
+@OptIn(ExperimentalMaterialApi::class)
+@Composable
+fun ProjectStatisticsTable(
+    proj: DBProject,
+    allMembers: List<DBMember>,
+    allBills: List<DBBill>,
+    customCategories: List<DBCategory>,
+    customPaymentModes: List<DBPaymentMode>,
+    onShareReady: (String) -> Unit
+) {
+    val context = LocalContext.current
+    val sdf = remember { SimpleDateFormat("yyyy-MM-dd", Locale.ROOT) }
+    val dateFormat = remember { android.text.format.DateFormat.getDateFormat(context) }
+
+    var categoryId by remember { mutableIntStateOf(-1000) }
+    var paymentModeId by remember { mutableIntStateOf(-1000) }
+    var dateMin by remember { mutableStateOf<String?>(null) }
+    var dateMax by remember { mutableStateOf<String?>(null) }
+
+    val categoryAll = stringResource(R.string.category_all)
+    val categoryNone = stringResource(R.string.category_none)
+    val categoryReimbursement = stringResource(R.string.category_reimbursement)
+    val categoryAllExceptReimbursement = stringResource(R.string.category_all_except_reimbursement)
+
+    val paymentModeAll = stringResource(R.string.payment_mode_all)
+    val paymentModeNone = stringResource(R.string.payment_mode_none)
+
+    val shareStatsHeader = stringResource(R.string.share_stats_header)
+    val shareStatsIntro = stringResource(R.string.share_stats_intro, proj.name.ifEmpty { proj.remoteId })
+
+    val categories = remember(proj.id, customCategories, categoryAll, categoryNone, categoryReimbursement, categoryAllExceptReimbursement) {
+        val list = mutableListOf<Triple<Int, String, String>>()
+        list.add(Triple(-1000, "📋", categoryAll))
+        list.add(Triple(-100, "🧾", categoryAllExceptReimbursement))
+        list.add(Triple(0, "❌", categoryNone))
+
+        val catsToUse = if (proj.type == ProjectType.LOCAL) {
+            CategoryUtils.getDefaultCategories(context, proj.id)
+        } else {
+            customCategories.ifEmpty {
+                CategoryUtils.getDefaultCategories(context, proj.id)
+            }
+        }
+
+        catsToUse.forEach {
+            list.add(Triple(it.remoteId.toInt(), it.icon, it.name ?: ""))
+        }
+        list.distinctBy { it.first }
+    }
+
+    val paymentModes = remember(proj.id, customPaymentModes, paymentModeAll, paymentModeNone) {
+        val list = mutableListOf<Triple<Int, String, String>>()
+        list.add(Triple(-1000, "💳", paymentModeAll))
+        list.add(Triple(0, "❌", paymentModeNone))
+
+        val pmsToUse = if (proj.type == ProjectType.LOCAL) {
+            CategoryUtils.getDefaultPaymentModes(context, proj.id)
+        } else {
+            customPaymentModes.ifEmpty {
+                CategoryUtils.getDefaultPaymentModes(context, proj.id)
+            }
+        }
+
+        pmsToUse.forEach {
+            list.add(Triple(it.remoteId.toInt(), it.icon, it.name ?: ""))
+        }
+        list.distinctBy { it.first }
+    }
+
+    val stats = remember(allMembers, allBills, categoryId, paymentModeId, dateMin, dateMax, shareStatsHeader, shareStatsIntro) {
+        val membersNbBills = mutableMapOf<Long, Int>()
+        val membersBalance = HashMap<Long, Double>()
+        val membersPaid = HashMap<Long, Double>()
+        val membersSpent = HashMap<Long, Double>()
+
+        SupportUtil.getStats(
+            allMembers, allBills,
+            membersNbBills, membersBalance, membersPaid, membersSpent,
+            categoryId, paymentModeId, dateMin, dateMax
+        )
+
+        var statsText = shareStatsIntro + "\n\n"
+        statsText += shareStatsHeader + "\n"
+
+        var totalPaid = 0.0
+        val memberStats = allMembers.map { m ->
+            val mPaid = membersPaid[m.id] ?: 0.0
+            totalPaid += mPaid
+            val mSpent = membersSpent[m.id] ?: 0.0
+            val mBalance = membersBalance[m.id] ?: 0.0
+
+            val rpaid = round(mPaid * 100.0) / 100.0
+            val rspent = round(mSpent * 100.0) / 100.0
+            val rbalance = round(abs(mBalance) * 100.0) / 100.0
+            val sign = if (mBalance > 0.01) "+" else if (mBalance < -0.01) "-" else ""
+
+            statsText += "\n${m.name} ("
+            statsText += (if (rpaid == 0.0) "--" else SupportUtil.normalNumberFormat.format(rpaid)) + " | "
+            statsText += (if (rspent == 0.0) "--" else SupportUtil.normalNumberFormat.format(rspent)) + " | "
+            statsText += "$sign${SupportUtil.normalNumberFormat.format(rbalance)})"
+
+            MemberStat(m.name, mPaid, mSpent, mBalance)
+        }
+
+        StatsResult(memberStats, totalPaid, statsText)
+    }
+
+    val dateMinLong = remember(dateMin) {
+        dateMin?.let { try { sdf.parse(it)?.time } catch (_: Exception) { null } }
+    }
+    val dateMaxLong = remember(dateMax) {
+        dateMax?.let { try { sdf.parse(it)?.time } catch (_: Exception) { null } }
+    }
+
+    LaunchedEffect(stats.statsText) {
+        onShareReady(stats.statsText)
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(16.dp)
+    ) {
+        Card(
+            elevation = 2.dp,
+            shape = MaterialTheme.shapes.medium,
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            Column(modifier = Modifier.padding(12.dp)) {
+                var categoryExpanded by remember { mutableStateOf(value = false) }
+                val selectedCategory = categories.find { it.first == categoryId }
+
+                EditableExposedDropdownMenu(
+                    value = selectedCategory?.third ?: "",
+                    placeholder = stringResource(R.string.setting_category),
+                    expanded = categoryExpanded,
+                    onExpandedChange = { categoryExpanded = it },
+                    onDismissRequest = { categoryExpanded = false },
+                    leadingIcon = {
+                        Box(modifier = Modifier.padding(start = 12.dp)) {
+                            if (selectedCategory != null) {
+                                Text(text = selectedCategory.second, fontSize = 20.sp)
+                            } else {
+                                Icon(Icons.Default.Category, contentDescription = null)
+                            }
+                        }
+                    },
+                    content = {
+                        categories.forEach { category ->
+                            DropdownMenuItem(onClick = {
+                                categoryId = category.first
+                                categoryExpanded = false
+                            }) {
+                                Text(text = category.second, fontSize = 20.sp)
+                                Spacer(modifier = Modifier.width(12.dp))
+                                Text(category.third)
+                            }
+                        }
+                    }
+                )
+
+                Spacer(modifier = Modifier.height(12.dp))
+
+                var pmExpanded by remember { mutableStateOf(false) }
+                val selectedPm = paymentModes.find { it.first == paymentModeId }
+
+                EditableExposedDropdownMenu(
+                    value = selectedPm?.third ?: "",
+                    placeholder = stringResource(R.string.setting_payment_mode),
+                    expanded = pmExpanded,
+                    onExpandedChange = { pmExpanded = it },
+                    onDismissRequest = { pmExpanded = false },
+                    leadingIcon = {
+                        Box(modifier = Modifier.padding(start = 12.dp)) {
+                            if (selectedPm != null) {
+                                Text(text = selectedPm.second, fontSize = 20.sp)
+                            } else {
+                                Icon(Icons.Default.Payment, contentDescription = null)
+                            }
+                        }
+                    },
+                    content = {
+                        paymentModes.forEach { pm ->
+                            DropdownMenuItem(onClick = {
+                                paymentModeId = pm.first
+                                pmExpanded = false
+                            }) {
+                                Text(text = pm.second, fontSize = 20.sp)
+                                Spacer(modifier = Modifier.width(12.dp))
+                                Text(pm.third)
+                            }
+                        }
+                    }
+                )
+
+                Spacer(modifier = Modifier.height(12.dp))
+
+                Row(modifier = Modifier.fillMaxWidth()) {
+                    ClickableOutlinedTextField(
+                        value = dateMin?.let { sdf.parse(it)?.let { d -> dateFormat.format(d) } } ?: "",
+                        onClick = {
+                            showDatePicker(context, dateMin, sdf, maxDate = dateMaxLong) { dateMin = it }
+                        },
+                        modifier = Modifier.weight(1f),
+                        placeholder = { Text(stringResource(R.string.stats_date_min)) },
+                        leadingIcon = { Icon(Icons.Default.Event, contentDescription = null) },
+                        trailingIcon = if (dateMin != null) {
+                            {
+                                IconButton(onClick = { dateMin = null }) {
+                                    Icon(Icons.Default.Close, contentDescription = null, tint = Color.Red.copy(alpha = 0.6f))
+                                }
+                            }
+                        } else null
+                    )
+
+                    Spacer(modifier = Modifier.width(8.dp))
+
+                    ClickableOutlinedTextField(
+                        value = dateMax?.let { sdf.parse(it)?.let { d -> dateFormat.format(d) } } ?: "",
+                        onClick = {
+                            showDatePicker(context, dateMax, sdf, minDate = dateMinLong) { dateMax = it }
+                        },
+                        modifier = Modifier.weight(1f),
+                        placeholder = { Text(stringResource(R.string.stats_date_max)) },
+                        leadingIcon = { Icon(Icons.Default.Event, contentDescription = null) },
+                        trailingIcon = if (dateMax != null) {
+                            {
+                                IconButton(onClick = { dateMax = null }) {
+                                    Icon(Icons.Default.Close, contentDescription = null, tint = Color.Red.copy(alpha = 0.6f))
+                                }
+                            }
+                        } else null
+                    )
+                }
+            }
+        }
+
+        Spacer(modifier = Modifier.height(24.dp))
+
+        // Table Header
+        Surface(
+            color = MaterialTheme.colors.onSurface.copy(alpha = 0.05f),
+            shape = MaterialTheme.shapes.small,
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            Row(modifier = Modifier.fillMaxWidth().padding(horizontal = 8.dp, vertical = 8.dp)) {
+                Text(stringResource(R.string.stats_who), modifier = Modifier.weight(2f), fontWeight = FontWeight.Bold, color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f), fontSize = 12.sp)
+                Text(stringResource(R.string.stats_paid), modifier = Modifier.weight(1.5f), fontWeight = FontWeight.Bold, textAlign = TextAlign.End, color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f), fontSize = 12.sp)
+                Text(stringResource(R.string.stats_spent), modifier = Modifier.weight(1.5f), fontWeight = FontWeight.Bold, textAlign = TextAlign.End, color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f), fontSize = 12.sp)
+                Text(stringResource(R.string.stats_balance), modifier = Modifier.weight(1.5f), fontWeight = FontWeight.Bold, textAlign = TextAlign.End, color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f), fontSize = 12.sp)
+            }
+        }
+
+        Spacer(modifier = Modifier.height(4.dp))
+
+        LazyColumn(modifier = Modifier.weight(1f)) {
+            items(stats.memberStats) { m ->
+                Row(modifier = Modifier.fillMaxWidth().padding(vertical = 12.dp, horizontal = 8.dp), verticalAlignment = Alignment.CenterVertically) {
+                    Text(m.name, modifier = Modifier.weight(2f), color = MaterialTheme.colors.onSurface, fontWeight = FontWeight.Medium)
+
+                    Text(
+                        if (m.paid == 0.0) "--" else SupportUtil.normalNumberFormat.format(m.paid),
+                        modifier = Modifier.weight(1.5f),
+                        textAlign = TextAlign.End,
+                        color = MaterialTheme.colors.onSurface
+                    )
+
+                    Text(
+                        if (m.spent == 0.0) "--" else SupportUtil.normalNumberFormat.format(m.spent),
+                        modifier = Modifier.weight(1.5f),
+                        textAlign = TextAlign.End,
+                        color = MaterialTheme.colors.onSurface
+                    )
+
+                    val balanceColor = if (m.balance > 0.01) colorResource(R.color.green) else if (m.balance < -0.01) colorResource(R.color.red) else MaterialTheme.colors.onSurface
+                    val sign = if (m.balance > 0.01) "+" else if (m.balance < -0.01) "-" else ""
+                    Text(
+                        "$sign${SupportUtil.normalNumberFormat.format(abs(m.balance))}",
+                        modifier = Modifier.weight(1.5f),
+                        textAlign = TextAlign.End,
+                        color = balanceColor,
+                        fontWeight = FontWeight.Bold
+                    )
+                }
+                Divider(thickness = 0.5.dp, color = MaterialTheme.colors.onSurface.copy(alpha = 0.05f))
+            }
+        }
+
+
+        Card(
+            elevation = 4.dp,
+            shape = MaterialTheme.shapes.medium,
+            backgroundColor = MaterialTheme.colors.primary,
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            Box(
+                modifier = Modifier.padding(16.dp, 12.dp),
+                contentAlignment = Alignment.Center
+            ) {
+                Text(
+                    text = stringResource(R.string.total, SupportUtil.normalNumberFormat.format(stats.totalPaid)),
+                    style = MaterialTheme.typography.h6,
+                    fontWeight = FontWeight.Bold,
+                    color = MaterialTheme.colors.onPrimary
+                )
+            }
+        }
+    }
+}
+
+private fun showDatePicker(
+    context: Context,
+    currentDate: String?,
+    sdf: SimpleDateFormat,
+    minDate: Long? = null,
+    maxDate: Long? = null,
+    onDateSelected: (String) -> Unit
+) {
+    val calendar = Calendar.getInstance()
+    currentDate?.let {
+        try { sdf.parse(it)?.let { date -> calendar.time = date } } catch (_: Exception) {}
+    }
+    val dialog = DatePickerDialog(
+        context,
+        { _, year, month, day ->
+            val cal = Calendar.getInstance().apply {
+                set(Calendar.YEAR, year)
+                set(Calendar.MONTH, month)
+                set(Calendar.DAY_OF_MONTH, day)
+            }
+            onDateSelected(sdf.format(cal.time))
+        },
+        calendar[Calendar.YEAR],
+        calendar[Calendar.MONTH],
+        calendar[Calendar.DAY_OF_MONTH]
+    )
+    minDate?.let { dialog.datePicker.minDate = it }
+    maxDate?.let { dialog.datePicker.maxDate = it }
+    dialog.show()
+}
+
+data class MemberStat(val name: String, val paid: Double, val spent: Double, val balance: Double)
+data class StatsResult(val memberStats: List<MemberStat>, val totalPaid: Double, val statsText: String)
+
+
+@Preview(showBackground = true)
+@Composable
+fun ProjectStatisticsTablePreview() {
+    MaterialTheme {
+        ProjectStatisticsTable(
+            proj = StatisticsMockData.project,
+            allMembers = StatisticsMockData.members,
+            allBills = StatisticsMockData.bills,
+            customCategories = emptyList(),
+            customPaymentModes = emptyList(),
+            onShareReady = {}
+        )    }
+}

app/src/main/java/net/helcel/cowspent/model/Category.kt

@@ -0,0 +1,5 @@
+package net.helcel.cowspent.model
+
+import java.io.Serializable
+
+class Category(val memberName: String?, val memberId: Long?) : Serializable

app/src/main/java/net/helcel/cowspent/model/CreditDebt.kt

@@ -0,0 +1,3 @@
+package net.helcel.cowspent.model
+
+class CreditDebt(var memberId: Long, var balance: Double)

app/src/main/java/net/helcel/cowspent/model/DBAccountProject.kt

@@ -0,0 +1,17 @@
+package net.helcel.cowspent.model
+
+import java.io.Serializable
+
+class DBAccountProject(
+    var id: Long,
+    var remoteId: String,
+    var password: String?,
+    var name: String,
+    var ncUrl: String,
+    var archivedTs: Long? = null
+) : Serializable {
+
+    override fun toString(): String {
+        return "#DBAccountProject$id/$remoteId,$name, $ncUrl, $password, archivedTs=$archivedTs"
+    }
+}

app/src/main/java/net/helcel/cowspent/model/DBBill.kt

@@ -0,0 +1,121 @@
+package net.helcel.cowspent.model
+
+import android.util.Log
+import java.io.Serializable
+import java.util.Calendar
+import java.util.Locale
+
+open class DBBill(
+    var id: Long,
+    var remoteId: Long,
+    var projectId: Long,
+    var payerId: Long,
+    var amount: Double,
+    var timestamp: Long,
+    var what: String,
+    var state: Int,
+    var repeat: String?,
+    var paymentMode: String?,
+    var categoryRemoteId: Int,
+    var comment: String?,
+    var paymentModeRemoteId: Int
+) : Item, Serializable {
+
+    var formattedWhat: String = ""
+    var formattedSubtitle: String = ""
+
+    var billOwers: List<DBBillOwer> = ArrayList()
+
+    val billOwersIds: List<Long>
+        get() {
+            val result: MutableList<Long> = ArrayList()
+            for (bo in billOwers) {
+                result.add(bo.memberId)
+            }
+            return result
+        }
+
+    val date: String
+        get() {
+            val cal = Calendar.getInstance()
+            cal.timeInMillis = timestamp * 1000
+            Log.v("ll", "[$what] get date ts $timestamp year ${cal[Calendar.YEAR]}")
+            val month = cal[Calendar.MONTH] + 1
+            val day = cal[Calendar.DAY_OF_MONTH]
+            return "${cal[Calendar.YEAR]}-${String.format(Locale.ROOT, "%02d", month)}-${
+                String.format(Locale.ROOT, "%02d", day)
+            }"
+        }
+
+    val time: String
+        get() {
+            val cal = Calendar.getInstance()
+            cal.timeInMillis = timestamp * 1000
+            return "${String.format(Locale.ROOT, "%02d", cal[Calendar.HOUR_OF_DAY])}:${
+                String.format(Locale.ROOT, "%02d", cal[Calendar.MINUTE])
+            }"
+        }
+
+
+    override fun toString(): String {
+        return "#DBBill$id/$remoteId,$projectId, $payerId, $amount, $timestamp, $what, $state, $repeat, $paymentMode, $categoryRemoteId"
+    }
+
+    override fun isSection(): Boolean {
+        return false
+    }
+
+    companion object {
+        const val PAYMODE_NONE = "n"
+        const val PAYMODE_CARD = "c"
+        const val PAYMODE_CASH = "b"
+        const val PAYMODE_CHECK = "f"
+        const val PAYMODE_TRANSFER = "t"
+        const val PAYMODE_ONLINE_SERVICE = "o"
+
+        const val PAYMODE_ID_NONE = 0
+        const val PAYMODE_ID_CARD = -1
+        const val PAYMODE_ID_CASH = -2
+        const val PAYMODE_ID_CHECK = -3
+        const val PAYMODE_ID_TRANSFER = -4
+        const val PAYMODE_ID_ONLINE_SERVICE = -5
+
+        @JvmField
+        val oldPmIdToNew: Map<String, Int> = object : HashMap<String, Int>() {
+            init {
+                put(PAYMODE_NONE, PAYMODE_ID_NONE)
+                put(PAYMODE_CARD, PAYMODE_ID_CARD)
+                put(PAYMODE_CASH, PAYMODE_ID_CASH)
+                put(PAYMODE_CHECK, PAYMODE_ID_CHECK)
+                put(PAYMODE_TRANSFER, PAYMODE_ID_TRANSFER)
+                put(PAYMODE_ONLINE_SERVICE, PAYMODE_ID_ONLINE_SERVICE)
+            }
+        }
+
+        const val CATEGORY_NONE = 0
+        const val CATEGORY_GROCERIES = -1
+        const val CATEGORY_LEISURE = -2
+        const val CATEGORY_RENT = -3
+        const val CATEGORY_BILLS = -4
+        const val CATEGORY_CULTURE = -5
+        const val CATEGORY_HEALTH = -6
+        const val CATEGORY_SHOPPING = -10
+        const val CATEGORY_REIMBURSEMENT = -11
+        const val CATEGORY_RESTAURANT = -12
+        const val CATEGORY_ACCOMMODATION = -13
+        const val CATEGORY_TRANSPORT = -14
+        const val CATEGORY_SPORT = -15
+
+        const val STATE_OK = 0
+        const val STATE_ADDED = 1
+        const val STATE_EDITED = 2
+        const val STATE_DELETED = 3
+
+        const val NON_REPEATED = "n"
+        const val REPEAT_DAY = "d"
+        const val REPEAT_WEEK = "w"
+        const val REPEAT_FORTNIGHT = "b"
+        const val REPEAT_MONTH = "m"
+        const val REPEAT_YEAR = "y"
+    }
+}

app/src/main/java/net/helcel/cowspent/model/DBBillOwer.kt

@@ -0,0 +1,14 @@
+package net.helcel.cowspent.model
+
+import java.io.Serializable
+
+class DBBillOwer(
+    var id: Long,
+    var billId: Long,
+    var memberId: Long
+) : Serializable {
+
+    override fun toString(): String {
+        return "#DBBillOwer$id/$billId,$memberId"
+    }
+}

app/src/main/java/net/helcel/cowspent/model/DBCategory.kt

@@ -0,0 +1,17 @@
+package net.helcel.cowspent.model
+
+import java.io.Serializable
+
+class DBCategory(
+    var id: Long,
+    var remoteId: Long,
+    var projectId: Long,
+    var name: String?,
+    var icon: String,
+    var color: String
+) : Serializable {
+
+    override fun toString(): String {
+        return "#DBCategory$id/$remoteId,$name"
+    }
+}

app/src/main/java/net/helcel/cowspent/model/DBCurrency.kt

@@ -0,0 +1,17 @@
+package net.helcel.cowspent.model
+
+import java.io.Serializable
+
+class DBCurrency(
+    var id: Long,
+    var remoteId: Long,
+    var projectId: Long,
+    var name: String?,
+    var exchangeRate: Double,
+    var state: Int
+) : Serializable {
+
+    override fun toString(): String {
+        return "#DBCurrency$id/$remoteId,$name , state: $state"
+    }
+}

app/src/main/java/net/helcel/cowspent/model/DBMember.kt

@@ -0,0 +1,23 @@
+package net.helcel.cowspent.model
+
+import java.io.Serializable
+
+class DBMember(
+    var id: Long,
+    var remoteId: Long,
+    var projectId: Long,
+    var name: String,
+    var isActivated: Boolean,
+    var weight: Double,
+    var state: Int,
+    var r: Int?,
+    var g: Int?,
+    var b: Int?,
+    var ncUserId: String?,
+    var avatar: String?
+) : Serializable {
+
+    override fun toString(): String {
+        return "#DBMember$id/$remoteId,$name, p$projectId, $weight, $isActivated"
+    }
+}

app/src/main/java/net/helcel/cowspent/model/DBPaymentMode.kt

@@ -0,0 +1,17 @@
+package net.helcel.cowspent.model
+
+import java.io.Serializable
+
+class DBPaymentMode(
+    var id: Long,
+    var remoteId: Long,
+    var projectId: Long,
+    var name: String?,
+    var icon: String,
+    var color: String
+) : Serializable {
+
+    override fun toString(): String {
+        return "#DBPaymentMode$id/$remoteId,$name"
+    }
+}

app/src/main/java/net/helcel/cowspent/model/DBProject.kt

@@ -0,0 +1,75 @@
+package net.helcel.cowspent.model
+
+import java.io.Serializable
+
+class DBProject(
+    var id: Long,
+    var remoteId: String,
+    var password: String,
+    var name: String,
+    var serverUrl: String?,
+    var email: String?,
+    var lastPayerId: Long?,
+    var type: ProjectType,
+    var lastSyncedTimestamp: Long?,
+    var currencyName: String?,
+    var isDeletionDisabled: Boolean,
+    var myAccessLevel: Int,
+    var bearerToken: String?,
+    var archivedTs: Long? = null,
+    var latestBillTs: Long = 0L
+) : Serializable {
+
+    val isArchived: Boolean
+        get() = archivedTs != null && archivedTs!! > 0
+
+    val isLocal: Boolean
+        get() = ProjectType.LOCAL == type
+
+    fun getRequestBaseUrl(isOcsRequest: Boolean): String {
+        val url = serverUrl ?: ""
+        return if (!isOcsRequest) {
+            url.replace("/+$".toRegex(), "")
+        } else {
+            url.replace("/+$".toRegex(), "")
+                .replace("/index.php/apps/cospend", "/ocs/v2.php/apps/cospend")
+        }
+    }
+
+    override fun toString(): String {
+        return "#DBProject$id/$remoteId,$name, $serverUrl, $email"
+    }
+
+    fun isShareable(): Boolean {
+        return !serverUrl.isNullOrEmpty()
+    }
+
+    fun getShareUrl(): String {
+        val url = serverUrl ?: ""
+        val strippedUrl = url
+            .replace("https://", "")
+            .replace("http://", "")
+            .replace("/index.php/apps/cospend", "")
+
+        val protocol = if (type == ProjectType.IHATEMONEY) "ihatemoney" else "cospend"
+        return "$protocol://$strippedUrl/$remoteId/$password"
+    }
+
+    fun getPublicWebUrl(): String {
+        val url = serverUrl ?: ""
+        return if (url.contains("index.php/apps/cospend")) {
+            "$url/loginproject/$remoteId"
+        } else {
+            "$url/$remoteId"
+        }
+    }
+
+    companion object {
+        const val ACCESS_LEVEL_UNKNOWN = -1
+        const val ACCESS_LEVEL_NONE = 0
+        const val ACCESS_LEVEL_VIEWER = 1
+        const val ACCESS_LEVEL_PARTICIPANT = 2
+        const val ACCESS_LEVEL_MAINTAINER = 3
+        const val ACCESS_LEVEL_ADMIN = 4
+    }
+}

app/src/main/java/net/helcel/cowspent/model/GroupedBill.kt

@@ -0,0 +1,26 @@
+package net.helcel.cowspent.model
+
+import java.io.Serializable
+
+class GroupedBill(
+    val sourceBills: List<DBBill>
+) : DBBill(
+    sourceBills.first().id,
+    sourceBills.first().remoteId,
+    sourceBills.first().projectId,
+    sourceBills.first().payerId,
+    sourceBills.sumOf { it.amount },
+    sourceBills.first().timestamp,
+    sourceBills.first().what,
+    sourceBills.first().state,
+    sourceBills.first().repeat,
+    sourceBills.first().paymentMode,
+    sourceBills.first().categoryRemoteId,
+    sourceBills.first().comment,
+    sourceBills.first().paymentModeRemoteId
+), Serializable {
+    init {
+        this.formattedWhat = sourceBills.first().formattedWhat
+        this.billOwers = sourceBills.flatMap { it.billOwers }
+    }
+}

app/src/main/java/net/helcel/cowspent/model/Item.kt

@@ -0,0 +1,5 @@
+package net.helcel.cowspent.model
+
+interface Item {
+    fun isSection(): Boolean
+}

app/src/main/java/net/helcel/cowspent/model/ProjectType.kt

@@ -0,0 +1,20 @@
+package net.helcel.cowspent.model
+
+enum class ProjectType(val id: String) {
+    LOCAL("l"), COSPEND("c"), IHATEMONEY("i");
+
+    companion object {
+        private val reverseMap: Map<String, ProjectType> = HashMap()
+
+        init {
+            for (type in entries) {
+                (reverseMap as MutableMap)[type.id] = type
+            }
+        }
+
+        @JvmStatic
+        fun getTypeById(id: String?): ProjectType? {
+            return reverseMap[id]
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/model/SectionItem.kt

@@ -0,0 +1,8 @@
+package net.helcel.cowspent.model
+
+class SectionItem(var title: String) : Item {
+    override fun isSection(): Boolean {
+        return true
+    }
+
+}

app/src/main/java/net/helcel/cowspent/model/Transaction.kt

@@ -0,0 +1,3 @@
+package net.helcel.cowspent.model
+
+class Transaction(var owerMemberId: Long, var receiverMemberId: Long, var amount: Double)

app/src/main/java/net/helcel/cowspent/model/UserItem.kt

@@ -0,0 +1,3 @@
+package net.helcel.cowspent.model
+
+class UserItem(var id: Long, var name: String)

app/src/main/java/net/helcel/cowspent/model/parsed/AustrianBillQrCode.kt

@@ -0,0 +1,5 @@
+package net.helcel.cowspent.model.parsed
+
+import java.util.Date
+
+class AustrianBillQrCode(val cashDeskId: String, val date: Date, val amount: Double)

app/src/main/java/net/helcel/cowspent/model/parsed/CroatianBillQrCode.kt

@@ -0,0 +1,5 @@
+package net.helcel.cowspent.model.parsed
+
+import java.time.LocalDateTime
+
+data class CroatianBillQrCode(val date: LocalDateTime?, val amount: Double)

app/src/main/java/net/helcel/cowspent/theme/ThemeUtils.kt

@@ -0,0 +1,119 @@
+package net.helcel.cowspent.theme
+
+import android.annotation.SuppressLint
+import android.content.res.Configuration
+import androidx.compose.foundation.background
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.*
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalConfiguration
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.preference.PreferenceManager
+import net.helcel.cowspent.util.ColorUtils
+
+object ThemeUtils {
+
+    val Shapes = Shapes(
+        small = RoundedCornerShape(12.dp),
+        medium = RoundedCornerShape(24.dp),
+        large = RoundedCornerShape(28.dp)
+    )
+
+    @SuppressLint("ConflictingOnColor")
+    @Composable
+    fun CowspentTheme(
+        accentColor: Int? = null,
+        darkTheme: Boolean? = null,
+        content: @Composable () -> Unit
+    ) {
+        val context = LocalContext.current
+        val config = LocalConfiguration.current
+        val sharedPreferences = remember { PreferenceManager.getDefaultSharedPreferences(context) }
+        val nightModeKey = stringResource(net.helcel.cowspent.R.string.pref_key_night_mode)
+
+        val resolvedDarkTheme = darkTheme ?: run {
+            val nightMode = sharedPreferences.getString(nightModeKey, "-1") ?: "-1"
+            when (nightMode) {
+                "1" -> false
+                "2" -> true
+                else -> isSystemInDarkTheme()
+            }
+        }
+
+        val resolvedAccentColor = accentColor ?: remember(resolvedDarkTheme) {
+            ColorUtils.primaryColor(context, resolvedDarkTheme)
+        }
+
+        val themedContext = remember(resolvedDarkTheme) {
+
+            if (resolvedDarkTheme != (config.uiMode and Configuration.UI_MODE_NIGHT_MASK == Configuration.UI_MODE_NIGHT_YES)) {
+                config.uiMode = (config.uiMode and Configuration.UI_MODE_NIGHT_MASK.inv()) or
+                        if (resolvedDarkTheme) Configuration.UI_MODE_NIGHT_YES else Configuration.UI_MODE_NIGHT_NO
+                context.createConfigurationContext(config)
+            } else {
+                context
+            }
+        }
+
+        val onPrimary = if (ColorUtils.isLightColor(resolvedAccentColor)) Color.Black else Color.White
+
+        val colors = if (resolvedDarkTheme) {
+            darkColors(
+                primary = Color(resolvedAccentColor),
+                primaryVariant = Color(resolvedAccentColor),
+                onPrimary = onPrimary,
+                secondary = Color(resolvedAccentColor),
+                onSecondary = onPrimary,
+                background = Color(0xFF121212),
+                surface = Color(0xFF121212),
+                onBackground = Color.White,
+                onSurface = Color.White
+            )
+        } else {
+            lightColors(
+                primary = Color(resolvedAccentColor),
+                primaryVariant = Color(resolvedAccentColor),
+                onPrimary = onPrimary,
+                secondary = Color(resolvedAccentColor),
+                onSecondary = onPrimary,
+                background = Color.White,
+                surface = Color.White,
+                onBackground = Color.Black,
+                onSurface = Color.Black
+            )
+        }
+
+        MaterialTheme(
+            colors = colors,
+            shapes = Shapes,
+            content = {
+                CompositionLocalProvider(LocalContext provides themedContext) {
+                    Surface(
+                        modifier = Modifier.fillMaxSize(),
+                        color = MaterialTheme.colors.background
+                    ) {
+                        Column {
+                            Box(
+                                modifier = Modifier
+                                    .fillMaxWidth()
+                                    .background(MaterialTheme.colors.primary)
+                                    .statusBarsPadding()
+                            )
+                            Box(modifier = Modifier.fillMaxSize()) {
+                                content()
+                            }
+                        }
+                    }
+                }
+            }
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/util/BillFormatter.kt

@@ -0,0 +1,58 @@
+package net.helcel.cowspent.util
+
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBCategory
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.model.DBPaymentMode
+
+object BillFormatter {
+    fun formatBills(
+        bills: List<DBBill>,
+        membersMap: Map<Long, DBMember>,
+        categoriesMap: Map<Long, DBCategory>,
+        paymentModesMap: Map<Long, DBPaymentMode>
+    ) {
+        for (bill in bills) {
+            var whatPrefix = ""
+            val pm = paymentModesMap[bill.paymentModeRemoteId.toLong()]
+            if (pm != null) {
+                whatPrefix += pm.icon + " "
+            } else {
+                when (bill.paymentModeRemoteId) {
+                    DBBill.PAYMODE_ID_CARD -> whatPrefix += "\uD83D\uDCB3 "
+                    DBBill.PAYMODE_ID_CASH -> whatPrefix += "\uD83D\uDCB5 "
+                    DBBill.PAYMODE_ID_CHECK -> whatPrefix += "\uD83C\uDFAB "
+                    DBBill.PAYMODE_ID_TRANSFER -> whatPrefix += "⇄ "
+                    DBBill.PAYMODE_ID_ONLINE_SERVICE -> whatPrefix += "\uD83C\uDF0E "
+                }
+            }
+
+            val cat = categoriesMap[bill.categoryRemoteId.toLong()]
+            if (cat != null) {
+                whatPrefix += cat.icon + " "
+            } else {
+                when (bill.categoryRemoteId) {
+                    DBBill.CATEGORY_GROCERIES -> whatPrefix += "\uD83D\uDED2 "
+                    DBBill.CATEGORY_LEISURE -> whatPrefix += "\uD83C\uDF89 "
+                    DBBill.CATEGORY_RENT -> whatPrefix += "\uD83C\uDFE0 "
+                    DBBill.CATEGORY_BILLS -> whatPrefix += "\uD83C\uDF29 "
+                    DBBill.CATEGORY_CULTURE -> whatPrefix += "\uD83D\uDEB8 "
+                    DBBill.CATEGORY_HEALTH -> whatPrefix += "\uD83D\uDC9A "
+                    DBBill.CATEGORY_SHOPPING -> whatPrefix += "\uD83D\uDECD "
+                    DBBill.CATEGORY_REIMBURSEMENT -> whatPrefix += "\uD83D\uDCB0 "
+                    DBBill.CATEGORY_RESTAURANT -> whatPrefix += "\uD83C\uDF74 "
+                    DBBill.CATEGORY_ACCOMMODATION -> whatPrefix += "\uD83D\uDECC "
+                    DBBill.CATEGORY_TRANSPORT -> whatPrefix += "\uD83D\uDE8C "
+                    DBBill.CATEGORY_SPORT -> whatPrefix += "\uD83C\uDFBE "
+                }
+            }
+            bill.formattedWhat = whatPrefix + bill.what
+
+            val payerName = membersMap[bill.payerId]?.name ?: bill.payerId.toString()
+            val owersNames = bill.billOwersIds.joinToString(", ") { id ->
+                membersMap[id]?.name ?: id.toString()
+            }
+            bill.formattedSubtitle = "$payerName \u2192 $owersNames"
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/util/BillParser.kt

@@ -0,0 +1,68 @@
+package net.helcel.cowspent.util
+
+import net.helcel.cowspent.model.parsed.AustrianBillQrCode
+import net.helcel.cowspent.model.parsed.CroatianBillQrCode
+import java.text.ParseException
+import java.text.SimpleDateFormat
+import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
+import java.util.Locale
+import kotlin.math.round
+import androidx.core.net.toUri
+
+object BillParser {
+    private val austrianQrCodeDateFormat = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", Locale.ROOT)
+    private val croatianQrCodeDateFormat = DateTimeFormatter.ofPattern("yyyyMMdd_HHmm")
+
+    @Throws(ParseException::class)
+    fun parseAustrianBillFromQrCode(scannedBill: String): AustrianBillQrCode {
+        val splitBill = scannedBill.split("_".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
+
+        if (splitBill.size < 10) {
+            throw ParseException("Could not parse bill to Austrian format!", 0)
+        }
+
+        val date = austrianQrCodeDateFormat.parse(splitBill[4]) ?: throw ParseException("Could not parse date", 0)
+        var totalAmount = 0.0
+        for (i in 1..5) {
+            totalAmount += SupportUtil.commaNumberFormat.parse(splitBill[4 + i])?.toDouble() ?: 0.0
+        }
+        // some amounts may be negative that's why we have to round here
+        return AustrianBillQrCode(splitBill[2], date, round(totalAmount * 100.0) / 100.0)
+    }
+
+    @Throws(ParseException::class)
+    fun parseCroatianBillFromQrCode(scannedBill: String): CroatianBillQrCode {
+        val uri = scannedBill.toUri()
+
+        // Be defensive, and only allow the known host
+        if (uri.host == null || uri.host != "porezna.gov.hr") {
+            throw ParseException("Does not look like a Croatian QR code", 0)
+        }
+
+        val dates = uri.getQueryParameters("datv")
+        val amounts = uri.getQueryParameters("izn")
+
+        var date: LocalDateTime? = null
+        if (!dates.isEmpty()) {
+            date = LocalDateTime.parse(dates[0], croatianQrCodeDateFormat)
+        }
+
+        var amount: Double? = null
+        if (!amounts.isEmpty()) {
+            try {
+                amount = SupportUtil.commaNumberFormat.parse(amounts[0])?.toDouble()
+            } catch (_: NullPointerException) {
+                // failed to parse as double
+            }
+        }
+
+        if (date == null && amount == null) {
+            throw ParseException("Could not parse bill to Croatian format!", 0)
+        }
+        return CroatianBillQrCode(
+            date,
+            amount ?: 0.0
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/util/CategoryUtils.kt

@@ -0,0 +1,37 @@
+package net.helcel.cowspent.util
+
+import android.content.Context
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBCategory
+import net.helcel.cowspent.model.DBPaymentMode
+
+object CategoryUtils {
+
+    fun getDefaultCategories(context: Context, projectId: Long): List<DBCategory> {
+        return listOf(
+            DBCategory(0, DBBill.CATEGORY_GROCERIES.toLong(), projectId, context.getString(R.string.category_groceries), "\uD83D\uDED2", "#ffaa00"),
+            DBCategory(0, DBBill.CATEGORY_LEISURE.toLong(), projectId, context.getString(R.string.category_leisure), "\uD83C\uDF89", "#aa55ff"),
+            DBCategory(0, DBBill.CATEGORY_RENT.toLong(), projectId, context.getString(R.string.category_rent), "\uD83C\uDFE0", "#da8733"),
+            DBCategory(0, DBBill.CATEGORY_BILLS.toLong(), projectId, context.getString(R.string.category_bills), "\uD83C\uDF29", "#4aa6b0"),
+            DBCategory(0, DBBill.CATEGORY_CULTURE.toLong(), projectId, context.getString(R.string.category_excursion), "\uD83D\uDEB8", "#0055ff"),
+            DBCategory(0, DBBill.CATEGORY_HEALTH.toLong(), projectId, context.getString(R.string.category_health), "\uD83D\uDC9A", "#bf090c"),
+            DBCategory(0, DBBill.CATEGORY_SHOPPING.toLong(), projectId, context.getString(R.string.category_shopping), "\uD83D\uDECD", "#e167d1"),
+            DBCategory(0, DBBill.CATEGORY_REIMBURSEMENT.toLong(), projectId, context.getString(R.string.category_reimbursement), "\uD83D\uDCB0", "#00ced1"),
+            DBCategory(0, DBBill.CATEGORY_RESTAURANT.toLong(), projectId, context.getString(R.string.category_restaurant), "\uD83C\uDF74", "#d0d5e1"),
+            DBCategory(0, DBBill.CATEGORY_ACCOMMODATION.toLong(), projectId, context.getString(R.string.category_accomodation), "\uD83D\uDECC", "#5de1a3"),
+            DBCategory(0, DBBill.CATEGORY_TRANSPORT.toLong(), projectId, context.getString(R.string.category_transport), "\uD83D\uDE8C", "#6f2ee1"),
+            DBCategory(0, DBBill.CATEGORY_SPORT.toLong(), projectId, context.getString(R.string.category_sport), "\uD83C\uDFBE", "#69e177")
+        )
+    }
+
+    fun getDefaultPaymentModes(context: Context, projectId: Long): List<DBPaymentMode> {
+        return listOf(
+            DBPaymentMode(0, DBBill.PAYMODE_ID_CARD.toLong(), projectId, context.getString(R.string.payment_mode_credit_card), "\uD83D\uDCB3", "#ff7f50"),
+            DBPaymentMode(0, DBBill.PAYMODE_ID_CASH.toLong(), projectId, context.getString(R.string.payment_mode_cash), "\uD83D\uDCB5", "#556b2f"),
+            DBPaymentMode(0, DBBill.PAYMODE_ID_CHECK.toLong(), projectId, context.getString(R.string.payment_mode_check), "\uD83C\uDFAB", "#a9a9a9"),
+            DBPaymentMode(0, DBBill.PAYMODE_ID_TRANSFER.toLong(), projectId, context.getString(R.string.payment_mode_transfer), "⇄", "#00ced1"),
+            DBPaymentMode(0, DBBill.PAYMODE_ID_ONLINE_SERVICE.toLong(), projectId, context.getString(R.string.payment_mode_online), "\uD83C\uDF0E", "#9932cc")
+        )
+    }
+}

app/src/main/java/net/helcel/cowspent/util/ColorUtils.kt

@@ -0,0 +1,95 @@
+package net.helcel.cowspent.util
+
+import android.content.Context
+import android.content.res.Configuration
+import android.graphics.*
+import android.os.Build
+import androidx.core.content.ContextCompat
+import androidx.preference.PreferenceManager
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.MultiFormatWriter
+import com.google.zxing.WriterException
+import net.helcel.cowspent.R
+import androidx.core.graphics.createBitmap
+
+object ColorUtils {
+
+    fun primaryColor(context: Context, isDark: Boolean? = null): Int {
+        val prefs = PreferenceManager.getDefaultSharedPreferences(context)
+
+        val resolvedIsDark = isDark ?: ((context.resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES)
+
+        // Determine color mode, migrating from old boolean flags if necessary
+        val modeKey = context.getString(R.string.pref_key_color_mode)
+        val colorMode = if (prefs.contains(modeKey)) {
+            prefs.getString(modeKey, "system")
+        } else {
+            val useServer = prefs.getBoolean(context.getString(R.string.pref_key_use_server_color), true)
+            val useSystem = prefs.getBoolean(context.getString(R.string.pref_key_use_system_color), true)
+            when {
+                useServer -> "server"
+                useSystem -> "system"
+                else -> "manual"
+            }
+        }
+
+        if (colorMode == "server") {
+            val serverColor = prefs.getInt(context.getString(R.string.pref_key_server_color), -1)
+            if (serverColor != -1) {
+                return serverColor
+            }
+        }
+
+        if (colorMode == "system" && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            return if (resolvedIsDark) {
+                context.getColor(android.R.color.system_accent1_200)
+            } else {
+                context.getColor(android.R.color.system_accent1_600)
+            }
+        }
+
+        val themedContext = if (isDark != null) {
+            val config = Configuration(context.resources.configuration)
+            config.uiMode = (config.uiMode and Configuration.UI_MODE_NIGHT_MASK.inv()) or
+                    if (isDark) Configuration.UI_MODE_NIGHT_YES else Configuration.UI_MODE_NIGHT_NO
+            context.createConfigurationContext(config)
+        } else {
+            context
+        }
+
+        return prefs.getInt(
+            context.getString(R.string.pref_key_color),
+            ContextCompat.getColor(themedContext, R.color.primary)
+        )
+    }
+
+    fun isLightColor(color: Int): Boolean {
+        return androidx.core.graphics.ColorUtils.calculateLuminance(color) > 0.5
+    }
+
+    @Throws(WriterException::class)
+    fun encodeAsBitmap(str: String): Bitmap? {
+        val result = try {
+            MultiFormatWriter().encode(
+                str,
+                BarcodeFormat.QR_CODE, 400, 400, null
+            )
+        } catch (_: IllegalArgumentException) {
+            // Unsupported format
+            return null
+        }
+        val w = result.width
+        val h = result.height
+        val pixels = IntArray(w * h)
+        for (y in 0 until h) {
+            val offset = y * w
+            for (x in 0 until w) {
+                pixels[offset + x] = if (result[x, y]) Color.BLACK else Color.WHITE
+            }
+        }
+        val bitmap = createBitmap(w, h)
+        bitmap.setPixels(pixels, 0, 400, 0, 0, w, h)
+        return bitmap
+    }
+
+}

app/src/main/java/net/helcel/cowspent/util/CospendClientUtil.kt

@@ -0,0 +1,121 @@
+package net.helcel.cowspent.util
+
+import android.util.Base64
+import android.util.Log
+import androidx.annotation.StringRes
+import net.helcel.cowspent.R
+import org.json.JSONArray
+import org.json.JSONException
+import org.json.JSONObject
+import java.io.BufferedReader
+import java.io.IOException
+import java.io.InputStreamReader
+import java.net.MalformedURLException
+import java.net.SocketTimeoutException
+
+object CospendClientUtil {
+
+    enum class LoginStatus(@param:StringRes val str: Int) {
+        OK(0),
+        AUTH_FAILED(R.string.error_username_password_invalid),
+        CONNECTION_FAILED(R.string.error_io),
+        NO_NETWORK(R.string.error_no_network),
+        JSON_FAILED(R.string.error_json),
+        SERVER_FAILED(R.string.error_server),
+        SSO_TOKEN_MISMATCH(R.string.error_token_mismatch),
+        REQ_FAILED(R.string.error_req_failed)
+    }
+
+    fun isHttp(url: String?): Boolean {
+        return url != null && url.length > 4 && url.startsWith("http") && url[4] != 's'
+    }
+
+    fun formatURL(urlParam: String): String {
+        var url = urlParam
+        if (!url.endsWith("/")) {
+            url += "/"
+        }
+        if (!url.startsWith("http://") && !url.startsWith("https://")) {
+            url = "https://$url"
+        }
+        val replacements = arrayOf("v0.2/", "api/", "apps/", "index.php/")
+        for (replacement in replacements) {
+            if (url.endsWith(replacement)) {
+                url = url.substring(0, url.length - replacement.length)
+            }
+        }
+        return url
+    }
+
+    fun isValidLogin(url: String, username: String, password: String): LoginStatus {
+        return try {
+            val targetURL = url + "index.php/apps/cospend/api/ping"
+            val con = SupportUtil.getHttpURLConnection(targetURL)
+            con.requestMethod = "GET"
+            con.setRequestProperty(
+                "Authorization",
+                "Basic "
+                        + String(
+                    Base64.encode(
+                        ("$username:$password").toByteArray(),
+                        Base64.NO_WRAP
+                    )
+                )
+            )
+            con.connectTimeout = 10 * 1000 // 10 seconds
+            con.connect()
+
+            Log.v(CospendClientUtil::class.java.simpleName, "Establishing connection to server")
+            when (con.responseCode) {
+                200 -> {
+                    Log.v(CospendClientUtil::class.java.simpleName, "" + con.responseMessage)
+                    val result = StringBuilder()
+                    val rd = BufferedReader(InputStreamReader(con.inputStream))
+                    var line: String?
+                    while ((rd.readLine().also { line = it }) != null) {
+                        result.append(line)
+                    }
+                    Log.v(CospendClientUtil::class.java.simpleName, result.toString())
+                    JSONArray(result.toString())
+                    LoginStatus.OK
+                }
+                in 401..403 -> {
+                    LoginStatus.AUTH_FAILED
+                }
+                else -> {
+                    LoginStatus.SERVER_FAILED
+                }
+            }
+        } catch (e: MalformedURLException) {
+            Log.e(CospendClientUtil::class.java.simpleName, "Exception", e)
+            LoginStatus.CONNECTION_FAILED
+        } catch (e: SocketTimeoutException) {
+            Log.e(CospendClientUtil::class.java.simpleName, "Exception", e)
+            LoginStatus.CONNECTION_FAILED
+        } catch (e: IOException) {
+            Log.e(CospendClientUtil::class.java.simpleName, "Exception", e)
+            LoginStatus.CONNECTION_FAILED
+        } catch (e: JSONException) {
+            Log.e(CospendClientUtil::class.java.simpleName, "Exception", e)
+            LoginStatus.JSON_FAILED
+        }
+    }
+
+    fun isValidURL(url: String): Boolean {
+        val result = StringBuilder()
+        return try {
+            val con = SupportUtil.getHttpURLConnection( url + "status.php")
+            con.requestMethod = VersatileProjectSyncClient.METHOD_GET
+            con.connectTimeout = 10 * 1000 // 10 seconds
+            val rd = BufferedReader(InputStreamReader(con.inputStream))
+            var line: String?
+            while ((rd.readLine().also { line = it }) != null) {
+                result.append(line)
+            }
+            val response = JSONObject(result.toString())
+            response.getBoolean("installed")
+        } catch (_: Exception) {
+            false
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/util/Cowspent.kt

@@ -0,0 +1,31 @@
+package net.helcel.cowspent.util
+
+import android.app.Application
+import android.content.Context
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.preference.PreferenceManager
+import net.helcel.cowspent.R
+
+class Cowspent : Application() {
+
+    override fun onCreate() {
+        setAppTheme(getAppTheme(applicationContext))
+        super.onCreate()
+    }
+
+    companion object {
+
+        fun setAppTheme(mode: Int) {
+            AppCompatDelegate.setDefaultNightMode(mode)
+        }
+
+        fun getAppTheme(context: Context): Int {
+            val prefs = PreferenceManager.getDefaultSharedPreferences(context)
+            val strValue = prefs.getString(
+                context.getString(R.string.pref_key_night_mode),
+                AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM.toString()
+            )
+            return strValue?.toInt() ?: AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/util/ExportUtil.kt

@@ -0,0 +1,88 @@
+package net.helcel.cowspent.util
+
+import net.helcel.cowspent.model.*
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+
+object ExportUtil {
+
+    @JvmStatic
+    fun createExportContent(db: CowspentSQLiteOpenHelper, projectId: Long): String {
+        var fileContent = ""
+
+        // get information
+        val project = db.getProject(projectId) ?: return ""
+        val membersById: MutableMap<Long, DBMember> = HashMap()
+        val members = db.getMembersOfProject(projectId, null)
+        for (m in members) {
+            membersById[m.id] = m
+        }
+        val bills = db.getBillsOfProject(projectId).toMutableList()
+
+        // write header
+        fileContent += "what,amount,date,timestamp,payer_name,payer_weight,payer_active,owers,repeat,categoryid,paymentmode\n"
+
+        // write members
+        for (m in members) {
+            val fakeBill = DBBill(
+                0, 0, projectId, m.id, 1.0, 666,
+                "deleteMeIfYouWant", DBBill.STATE_OK, DBBill.NON_REPEATED,
+                DBBill.PAYMODE_NONE, 0, "", 0
+            )
+            val fakeBillOwers: MutableList<DBBillOwer> = ArrayList()
+            fakeBillOwers.add(DBBillOwer(0, 0, m.id))
+            fakeBill.billOwers = fakeBillOwers
+            bills.add(0, fakeBill)
+        }
+
+        // write bills
+        for (b in bills) {
+            val payerId = b.payerId
+            val payer = membersById[payerId] ?: continue
+            val payerName = payer.name
+            val payerWeight = payer.weight
+            val payerActive = if (payer.isActivated) 1 else 0
+            val billOwers = b.billOwers
+            var owersTxt = ""
+            for (bo in billOwers) {
+                owersTxt += membersById[bo.memberId]?.name + ","
+            }
+            owersTxt = owersTxt.replace(",$".toRegex(), "")
+            fileContent += "\"${b.what}\",${b.amount},${b.date},${b.timestamp},\"$payerName\"," +
+                    "$payerWeight,$payerActive,\"$owersTxt\",${b.repeat},${b.categoryRemoteId}," +
+                    "${b.paymentMode}\n"
+        }
+
+        // write categories
+        val cats = db.getCategories(projectId)
+        if (cats.isNotEmpty()) {
+            fileContent += "\ncategoryname,categoryid,icon,color\n"
+            for (cat in cats) {
+                fileContent += "\"${cat.name}\",${cat.id},\"${cat.icon}\",\"${cat.color}\"\n"
+            }
+        }
+
+        // write currencies
+        val curs = db.getCurrencies(projectId)
+        if (curs.isNotEmpty() && project.currencyName != null &&
+            project.currencyName!!.isNotEmpty() && project.currencyName != "null"
+        ) {
+            fileContent += "\ncurrencyname,exchange_rate\n"
+            fileContent += "\"${project.currencyName}\",1\n"
+            for (cur in curs) {
+                fileContent += "\"${cur.name}\",${cur.exchangeRate}\n"
+            }
+        }
+
+        return fileContent
+    }
+
+    @JvmStatic
+    fun createExportFileName(db: CowspentSQLiteOpenHelper, projectId: Long): String {
+        val project = db.getProject(projectId) ?: return "export.csv"
+        return if (project.name.isEmpty()) {
+            project.remoteId + ".csv"
+        } else {
+            project.name + ".csv"
+        }
+    }
+}

app/src/main/java/net/helcel/cowspent/util/ICallback.kt

@@ -0,0 +1,10 @@
+package net.helcel.cowspent.util
+
+/**
+ * Callback
+ */
+interface ICallback {
+    fun onFinish()
+    fun onFinish(result: String, message: String)
+    fun onScheduled()
+}

app/src/main/java/net/helcel/cowspent/util/IProjectCreationCallback.kt

@@ -0,0 +1,9 @@
+package net.helcel.cowspent.util
+
+/**
+ * Callback
+ */
+interface IProjectCreationCallback {
+    fun onFinish(result: String, message: String, usePrivateApi: Boolean)
+
+}

app/src/main/java/net/helcel/cowspent/util/IRefreshBillsListCallback.kt

@@ -0,0 +1,8 @@
+package net.helcel.cowspent.util
+
+/**
+ * Call back into the BillsListActivity and ask it to refresh the list in the UI
+ */
+interface IRefreshBillsListCallback {
+    fun refreshLists(scrollToTop: Boolean)
+}

app/src/main/java/net/helcel/cowspent/util/NextcloudClient.kt

@@ -0,0 +1,302 @@
+package net.helcel.cowspent.util
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.util.Base64
+import android.util.Log
+import androidx.annotation.WorkerThread
+import com.nextcloud.android.sso.QueryParam
+import com.nextcloud.android.sso.aidl.NextcloudRequest
+import com.nextcloud.android.sso.api.NextcloudAPI
+import com.nextcloud.android.sso.exceptions.NextcloudHttpRequestFailedException
+import com.nextcloud.android.sso.exceptions.TokenMismatchException
+import net.helcel.cowspent.model.DBProject
+import org.json.JSONException
+import org.json.JSONObject
+import java.io.*
+import java.net.HttpURLConnection
+
+@WorkerThread
+class NextcloudClient(
+    private val url: String,
+    private val username: String,
+    private val password: String,
+    private val nextcloudAPI: NextcloudAPI?,
+    private val context: Context
+) {
+
+    @Throws(JSONException::class, IOException::class, TokenMismatchException::class, NextcloudHttpRequestFailedException::class)
+    fun getAccountProjects(useOcsApi: Boolean): ServerResponse.AccountProjectsResponse {
+        val target = if (useOcsApi)
+            "/ocs/v2.php/apps/cospend/api/v1/projects"
+        else
+            "/index.php/apps/cospend/getProjects"
+        val method = if (useOcsApi) METHOD_GET else METHOD_POST
+        return if (nextcloudAPI != null) {
+            Log.d(javaClass.simpleName, "using SSO to get/sync account projects")
+            Log.d(javaClass.simpleName, "Sync projects target $target")
+            ServerResponse.AccountProjectsResponse(
+                requestServerWithSSO(nextcloudAPI, target, method, null, useOcsApi),
+                useOcsApi
+            )
+        } else {
+            Log.d(javaClass.simpleName, "Sync projects target $target")
+            ServerResponse.AccountProjectsResponse(
+                requestServer(target, method, null, "", true, useOcsApi),
+                useOcsApi
+            )
+        }
+    }
+
+    @Throws(JSONException::class, IOException::class, TokenMismatchException::class, NextcloudHttpRequestFailedException::class)
+    fun getCapabilities(project: DBProject?): ServerResponse.CapabilitiesResponse {
+        val target: String = if (project == null || url != "") {
+            "/ocs/v2.php/cloud/capabilities"
+        } else {
+            val realServerUrl = project.serverUrl!!
+                .replace("/apps/cospend", "")
+                .replace("/index.php", "")
+            "$realServerUrl/ocs/v2.php/cloud/capabilities"
+        }
+        return if (nextcloudAPI != null) {
+            Log.d(javaClass.simpleName, "using SSO to get color")
+            ServerResponse.CapabilitiesResponse(requestServerWithSSO(nextcloudAPI, target, METHOD_GET, null, true))
+        } else {
+            ServerResponse.CapabilitiesResponse(requestServer(target, METHOD_GET, null, null,
+                needLogin = true,
+                isOCSRequest = true
+            ))
+        }
+    }
+
+    @Throws(JSONException::class, IOException::class, TokenMismatchException::class, NextcloudHttpRequestFailedException::class)
+    fun getAvatar(otherUserName: String?): ServerResponse.AvatarResponse {
+        val targetUserName = otherUserName ?: username
+        val target = "/index.php/avatar/$targetUserName/45"
+        return if (nextcloudAPI != null) {
+            Log.d(javaClass.simpleName, "using SSO to get avatar")
+            ServerResponse.AvatarResponse(imageRequestServerWithSSO(nextcloudAPI, target, METHOD_GET, null))
+        } else {
+            ServerResponse.AvatarResponse(imageRequestServer(target, METHOD_GET, null, null,
+                needLogin = true,
+                isOCSRequest = false
+            ))
+        }
+    }
+
+    @Throws(TokenMismatchException::class, NextcloudHttpRequestFailedException::class)
+    private fun requestServerWithSSO(
+        nextcloudAPI: NextcloudAPI,
+        target: String,
+        method: String,
+        params: Collection<QueryParam>?,
+        isOCSRequest: Boolean
+    ): VersatileProjectSyncClient.ResponseData {
+        val result = StringBuilder()
+        val headers: MutableMap<String, List<String>> = HashMap()
+        if (isOCSRequest) {
+            val acceptHeader: MutableList<String> = ArrayList()
+            acceptHeader.add("application/json")
+            headers["Accept"] = acceptHeader
+        }
+        val nextcloudRequest: NextcloudRequest = if (params == null) {
+            NextcloudRequest.Builder()
+                .setMethod(method)
+                .setUrl(target)
+                .setHeader(headers)
+                .build()
+        } else {
+            NextcloudRequest.Builder()
+                .setMethod(method)
+                .setUrl(target)
+                .setParameter(params)
+                .setHeader(headers)
+                .build()
+        }
+        try {
+            val response = nextcloudAPI.performNetworkRequestV2(nextcloudRequest)
+            val inputStream = response.body
+            val rd = BufferedReader(InputStreamReader(inputStream))
+            var line: String?
+            while (rd.readLine().also { line = it } != null) {
+                result.append(line)
+            }
+            Log.d(javaClass.simpleName, "RES $result")
+            inputStream.close()
+        } catch (e: TokenMismatchException) {
+            Log.d(javaClass.simpleName, "Mismatcho SSO server request error $e")
+            throw e
+        } catch (e: NextcloudHttpRequestFailedException) {
+            Log.d(javaClass.simpleName, "SSO server HTTP request failed ${e.statusCode}")
+            throw e
+        } catch (e: Exception) {
+            Log.d(javaClass.simpleName, "SSO server request error $e")
+        }
+        return VersatileProjectSyncClient.ResponseData(result.toString(), "", 0)
+    }
+
+    @Throws(TokenMismatchException::class, NextcloudHttpRequestFailedException::class)
+    private fun imageRequestServerWithSSO(
+        nextcloudAPI: NextcloudAPI,
+        target: String,
+        method: String,
+        params: Collection<QueryParam>?
+    ): VersatileProjectSyncClient.ResponseData {
+        var strBase64 = ""
+        val nextcloudRequest: NextcloudRequest = if (params == null) {
+            NextcloudRequest.Builder()
+                .setMethod(method)
+                .setUrl(target)
+                .build()
+        } else {
+            NextcloudRequest.Builder()
+                .setMethod(method)
+                .setUrl(target)
+                .setParameter(params)
+                .build()
+        }
+        try {
+            val response = nextcloudAPI.performNetworkRequestV2(nextcloudRequest)
+            val inputStream = response.body
+            val selectedImage = BitmapFactory.decodeStream(inputStream)
+            val stream = ByteArrayOutputStream()
+            selectedImage.compress(Bitmap.CompressFormat.PNG, 100, stream)
+            val byteArray = stream.toByteArray()
+            strBase64 = Base64.encodeToString(byteArray, 0)
+            inputStream.close()
+        } catch (e: TokenMismatchException) {
+            Log.d(javaClass.simpleName, "Mismatcho SSO server request error $e")
+            throw e
+        } catch (e: NextcloudHttpRequestFailedException) {
+            Log.d(javaClass.simpleName, "SSO server HTTP request failed ${e.statusCode}")
+            throw e
+        } catch (e: Exception) {
+            Log.d(javaClass.simpleName, "SSO server request error $e")
+        }
+        return VersatileProjectSyncClient.ResponseData(strBase64, "", 0)
+    }
+
+    @Throws(IOException::class, NextcloudHttpRequestFailedException::class)
+    private fun requestServer(
+        target: String,
+        method: String, params: JSONObject?, lastETag: String?, needLogin: Boolean, isOCSRequest: Boolean
+    ): VersatileProjectSyncClient.ResponseData {
+        val result = StringBuilder()
+        val targetURL = url + target.replace("^/".toRegex(), "")
+        Log.d(javaClass.simpleName, "method and target URL: $method $targetURL")
+        val httpCon = SupportUtil.getHttpURLConnection(targetURL)
+        httpCon.requestMethod = method
+        if (needLogin) {
+            httpCon.setRequestProperty(
+                "Authorization",
+                "Basic " + Base64.encodeToString("$username:$password".toByteArray(), Base64.NO_WRAP)
+            )
+        }
+        httpCon.setRequestProperty("Connection", "Close")
+        httpCon.setRequestProperty("User-Agent", "cowspent-android/" + SupportUtil.getAppVersionName(context))
+        if (lastETag != null && METHOD_GET == method) {
+            httpCon.setRequestProperty("If-None-Match", lastETag)
+        }
+        if (isOCSRequest) {
+            httpCon.setRequestProperty("OCS-APIRequest", "true")
+            httpCon.setRequestProperty("Accept", "application/json")
+        }
+        httpCon.connectTimeout = 10 * 1000 // 10 seconds
+        var paramData: ByteArray? = null
+        if (params != null) {
+            paramData = params.toString().toByteArray()
+            Log.d(javaClass.simpleName, "Params: $params")
+            httpCon.setFixedLengthStreamingMode(paramData.size)
+            httpCon.setRequestProperty("Content-Type", application_json)
+            httpCon.doOutput = true
+            val os = httpCon.outputStream
+            os.write(paramData)
+            os.flush()
+            os.close()
+        }
+        val responseCode = httpCon.responseCode
+        Log.d(javaClass.simpleName, "HTTP response code: $responseCode")
+        if (responseCode == HttpURLConnection.HTTP_NOT_MODIFIED) {
+            throw ServerResponse.NotModifiedException()
+        }
+        if (responseCode >= 400) {
+            throw NextcloudHttpRequestFailedException(context, responseCode, IOException(""))
+        }
+        Log.i(TAG, "METHOD : $method")
+        val rd = BufferedReader(InputStreamReader(httpCon.inputStream))
+        var line: String?
+        while (rd.readLine().also { line = it } != null) {
+            result.append(line)
+        }
+        val etag = httpCon.getHeaderField("ETag")
+        val lastModified = httpCon.getHeaderFieldDate("Last-Modified", 0) / 1000
+        Log.i(
+            javaClass.simpleName,
+            "Result length:  " + result.length + (if (paramData == null) "" else "; Request length: " + paramData.size)
+        )
+        Log.d(javaClass.simpleName, "ETag: $etag; Last-Modified: $lastModified (${httpCon.getHeaderField("Last-Modified")})")
+        return VersatileProjectSyncClient.ResponseData(result.toString(), "", 0)
+    }
+
+    @Throws(IOException::class, NextcloudHttpRequestFailedException::class)
+    private fun imageRequestServer(
+        target: String,
+        method: String, params: JSONObject?, lastETag: String?, needLogin: Boolean, isOCSRequest: Boolean
+    ): VersatileProjectSyncClient.ResponseData {
+        var strBase64: String
+        val targetURL = url + target.replace("^/".toRegex(), "")
+        val httpCon = SupportUtil.getHttpURLConnection( targetURL)
+        httpCon.requestMethod = method
+        if (needLogin) {
+            httpCon.setRequestProperty(
+                "Authorization",
+                "Basic " + Base64.encodeToString("$username:$password".toByteArray(), Base64.NO_WRAP)
+            )
+        }
+        httpCon.setRequestProperty("Connection", "Close")
+        httpCon.setRequestProperty("User-Agent", "Cowspent-android/" + SupportUtil.getAppVersionName(context))
+        if (lastETag != null && METHOD_GET == method) {
+            httpCon.setRequestProperty("If-None-Match", lastETag)
+        }
+        if (isOCSRequest) {
+            httpCon.setRequestProperty("OCS-APIRequest", "true")
+        }
+        httpCon.connectTimeout = 10 * 1000 // 10 seconds
+        Log.d(javaClass.simpleName, "$method $targetURL")
+        var paramData: ByteArray?
+        if (params != null) {
+            paramData = params.toString().toByteArray()
+            Log.d(javaClass.simpleName, "Params: $params")
+            httpCon.setFixedLengthStreamingMode(paramData.size)
+            httpCon.setRequestProperty("Content-Type", application_json)
+            httpCon.doOutput = true
+            val os = httpCon.outputStream
+            os.write(paramData)
+            os.flush()
+            os.close()
+        }
+        val responseCode = httpCon.responseCode
+        Log.d(javaClass.simpleName, "HTTP response code: $responseCode")
+        if (responseCode == HttpURLConnection.HTTP_NOT_MODIFIED) {
+            throw ServerResponse.NotModifiedException()
+        }
+        if (responseCode >= 400) {
+            throw NextcloudHttpRequestFailedException(context, responseCode, IOException(""))
+        }
+        Log.i(TAG, "METHOD : $method")
+        val selectedImage = BitmapFactory.decodeStream(httpCon.inputStream)
+        val stream = ByteArrayOutputStream()
+        selectedImage.compress(Bitmap.CompressFormat.PNG, 100, stream)
+        val byteArray = stream.toByteArray()
+        strBase64 = Base64.encodeToString(byteArray, 0)
+        return VersatileProjectSyncClient.ResponseData(strBase64, "", 0)
+    }
+
+    companion object {
+        private val TAG = NextcloudClient::class.java.simpleName
+        const val METHOD_GET = "GET"
+        const val METHOD_POST = "POST"
+        private const val application_json = "application/json"
+    }
+}

app/src/main/java/net/helcel/cowspent/util/ServerResponse.kt

@@ -0,0 +1,776 @@
+package net.helcel.cowspent.util
+
+import android.util.Log
+import net.helcel.cowspent.model.DBAccountProject
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.model.DBBillOwer
+import net.helcel.cowspent.model.DBCategory
+import net.helcel.cowspent.model.DBCurrency
+import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.model.DBPaymentMode
+import net.helcel.cowspent.model.DBProject
+import org.json.JSONArray
+import org.json.JSONException
+import org.json.JSONObject
+import org.xml.sax.SAXException
+import java.io.ByteArrayInputStream
+import java.io.IOException
+import java.io.InputStream
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+import javax.xml.parsers.DocumentBuilderFactory
+import javax.xml.parsers.ParserConfigurationException
+
+
+/**
+ * Provides entity classes for handling server responses
+ */
+@Suppress("unused")
+open class ServerResponse(
+    private val response: VersatileProjectSyncClient.ResponseData,
+    protected val isOcsResponse: Boolean
+) {
+    private val sdf = SimpleDateFormat("yyyy-MM-dd", Locale.ROOT)
+
+    class NotModifiedException : IOException()
+
+    protected val content: String
+        get() = response.content
+
+    val lastModified: Long
+        get() = response.lastModified
+
+    @Throws(JSONException::class)
+    fun getResponseObjectData(): JSONObject {
+        val rawData = JSONObject(content)
+        if (!isOcsResponse) {
+            return rawData
+        }
+        val data = rawData.getJSONObject("ocs")
+        return data.getJSONObject("data")
+    }
+
+    @Throws(JSONException::class)
+    fun getResponseArrayData(): JSONArray {
+        if (!isOcsResponse) {
+            return JSONArray(content)
+        }
+        val rawData = JSONObject(content)
+        val data = rawData.getJSONObject("ocs")
+        return data.getJSONArray("data")
+    }
+
+    @Throws(JSONException::class)
+    fun getResponseStringData(): String {
+        if (!isOcsResponse) {
+            return content
+        }
+        val rawData = JSONObject(content)
+        val data = rawData.getJSONObject("ocs")
+        return data.getString("data")
+    }
+
+    class ProjectResponse(response: VersatileProjectSyncClient.ResponseData, isOcsResponse: Boolean) :
+        ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val email: String
+            get() = getEmailFromJSON(getResponseObjectData())
+
+        @get:Throws(JSONException::class)
+        val name: String
+            get() = getNameFromJSON(getResponseObjectData())
+
+        @get:Throws(JSONException::class)
+        val deletionDisabled: Boolean
+            get() = getDeletionDisabledFromJSON(getResponseObjectData())
+
+        @get:Throws(JSONException::class)
+        val archivedTs: Long?
+            get() = getArchivedTsFromJSON(getResponseObjectData())
+
+        @get:Throws(JSONException::class)
+        val myAccessLevel: Int
+            get() = getMyAccessLevelFromJSON(getResponseObjectData())
+
+        @get:Throws(JSONException::class)
+        val currencyName: String
+            get() = getCurrencyNameFromJSON(getResponseObjectData())
+
+        @Throws(JSONException::class)
+        fun getMembers(projId: Long): List<DBMember> {
+            return getMembersFromJSON(getResponseObjectData(), projId)
+        }
+
+        @Throws(JSONException::class)
+        fun getCategories(projId: Long): List<DBCategory> {
+            return getCategoriesFromJSON(getResponseObjectData(), projId)
+        }
+
+        @Throws(JSONException::class)
+        fun getPaymentModes(projId: Long): List<DBPaymentMode> {
+            return getPaymentModesFromJSON(getResponseObjectData(), projId)
+        }
+
+        @Throws(JSONException::class)
+        fun getCurrencies(projId: Long): List<DBCurrency> {
+            return getCurrenciesFromJSON(getResponseObjectData(), projId)
+        }
+    }
+
+    class CreateRemoteMemberResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean,
+        private val isJsonMember: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+
+        @get:Throws(JSONException::class)
+        val remoteMemberId: Long
+            get() = if (isJsonMember)
+                getRemoteMemberIdFromJSON(getResponseObjectData())
+            else
+                getResponseStringData().toLong()
+    }
+
+    class CreateRemoteCurrencyResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+    }
+
+    class EditRemoteCurrencyResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+    }
+
+    class DeleteRemoteCurrencyResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+    }
+
+    class EditRemoteProjectResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+    }
+
+    class EditRemoteMemberResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @Throws(JSONException::class)
+        fun getRemoteId(projectId: Long): Long {
+            return getMemberFromJSON(getResponseObjectData(), projectId).remoteId
+        }
+    }
+
+    class EditRemoteBillResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+    }
+
+    class CreateRemoteBillResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+    }
+
+    class DeleteRemoteBillResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+    }
+
+    class DeleteRemoteProjectResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+    }
+
+    class CreateRemoteProjectResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @get:Throws(JSONException::class)
+        val stringContent: String
+            get() = getResponseStringData()
+    }
+
+    class BillsResponse(response: VersatileProjectSyncClient.ResponseData, isOcsResponse: Boolean) :
+        ServerResponse(response, isOcsResponse) {
+
+        @Throws(JSONException::class)
+        fun getBillsCospend(projId: Long, memberRemoteIdToId: Map<Long, Long>): List<DBBill> {
+            return getBillsFromJSONObject(getResponseObjectData(), projId, memberRemoteIdToId)
+        }
+
+        @Throws(JSONException::class)
+        fun getBillsIHM(projId: Long, memberRemoteIdToId: Map<Long, Long>): List<DBBill> {
+            return getBillsFromJSONArray(JSONArray(content), projId, memberRemoteIdToId)
+        }
+
+
+        @get:Throws(JSONException::class)
+        val allBillIds: List<Long>
+            get() = getAllBillIdsFromJSON(getResponseObjectData())
+
+        @get:Throws(JSONException::class)
+        val syncTimestamp: Long
+            get() = getSyncTimestampFromJSON(getResponseObjectData())
+    }
+
+    class MembersResponse(response: VersatileProjectSyncClient.ResponseData, isOcsResponse: Boolean) :
+        ServerResponse(response, isOcsResponse) {
+
+        @Throws(JSONException::class)
+        fun getMembers(projId: Long): List<DBMember> {
+            return getMembersFromJSONArray(getResponseArrayData(), projId)
+        }
+    }
+
+    class AccountProjectsResponse(
+        response: VersatileProjectSyncClient.ResponseData,
+        isOcsResponse: Boolean
+    ) : ServerResponse(response, isOcsResponse) {
+
+        @Throws(JSONException::class)
+        fun getAccountProjects(ncUrl: String): List<DBAccountProject> {
+            return getAccountProjectsFromJSONArray(getResponseArrayData(), ncUrl)
+        }
+    }
+
+    class CapabilitiesResponse(response: VersatileProjectSyncClient.ResponseData) :
+        ServerResponse(response, true) {
+
+        @get:Throws(IOException::class, JSONException::class)
+        val color: String?
+            get() = getColorFromJsonContent(JSONObject(content))
+
+        @get:Throws(JSONException::class)
+        val cospendVersion: String?
+            get() = getCospendVersionFromCapabilitiesContent(JSONObject(content))
+    }
+
+    class AvatarResponse(response: VersatileProjectSyncClient.ResponseData) :
+        ServerResponse(response, false) {
+
+        @get:Throws(IOException::class)
+        val avatarString: String
+            get() = content
+    }
+
+    @Throws(JSONException::class)
+    protected fun getPublicTokenFromJSON(json: JSONObject): String? {
+        if (json.has("code") && json.has("sharetoken")) {
+            val done = json.getInt("code")
+            val publicToken = json.getString("sharetoken")
+            if (done == 1) {
+                return publicToken
+            }
+        }
+        return null
+    }
+
+    @Throws(JSONException::class)
+    protected fun getNameFromJSON(json: JSONObject): String {
+        return if (json.has("name") && !json.isNull("name")) {
+            json.getString("name")
+        } else ""
+    }
+
+    @Throws(JSONException::class)
+    protected fun getDeletionDisabledFromJSON(json: JSONObject): Boolean {
+        return if (json.has("deletiondisabled")) {
+            json.getBoolean("deletiondisabled")
+        } else false
+    }
+
+    @Throws(JSONException::class)
+    protected fun getArchivedTsFromJSON(json: JSONObject): Long? {
+        return if (json.has("archived_ts") && !json.isNull("archived_ts")) {
+            val ts = json.optLong("archived_ts", 0)
+            if (ts > 0) ts else null
+        } else null
+    }
+
+    @Throws(JSONException::class)
+    protected fun getMyAccessLevelFromJSON(json: JSONObject): Int {
+        return if (json.has("myaccesslevel")) {
+            json.getInt("myaccesslevel")
+        } else DBProject.ACCESS_LEVEL_UNKNOWN
+    }
+
+    @Throws(JSONException::class)
+    protected fun getCurrencyNameFromJSON(json: JSONObject): String {
+        return if (json.has("currencyname") && !json.isNull("currencyname")) {
+            json.getString("currencyname")
+        } else ""
+    }
+
+    @Throws(JSONException::class)
+    protected fun getEmailFromJSON(json: JSONObject): String {
+        return if (json.has("contact_email") && !json.isNull("contact_email")) {
+            json.getString("contact_email")
+        } else ""
+    }
+
+    @Throws(JSONException::class)
+    protected fun getMembersFromJSONArray(jsonMs: JSONArray, projId: Long): List<DBMember> {
+        val members: MutableList<DBMember> = ArrayList()
+        for (i in 0 until jsonMs.length()) {
+            val jsonM = jsonMs.getJSONObject(i)
+            members.add(getMemberFromJSON(jsonM, projId))
+        }
+        return members
+    }
+
+    @Throws(JSONException::class)
+    protected fun getCategoriesFromJSON(json: JSONObject, projId: Long): List<DBCategory> {
+        val categories: MutableList<DBCategory> = ArrayList()
+        if (json.has("categories") && json.get("categories") is JSONObject) {
+            val jsonCats = json.getJSONObject("categories")
+            val keys = jsonCats.keys()
+            while (keys.hasNext()) {
+                val key = keys.next()
+                if (jsonCats.get(key) is JSONObject) {
+                    categories.add(getCategoryFromJSON(jsonCats.getJSONObject(key), key, projId))
+                }
+            }
+        }
+        return categories
+    }
+
+    @Throws(JSONException::class)
+    protected fun getCategoryFromJSON(json: JSONObject, remoteIdStr: String, projId: Long): DBCategory {
+        val remoteId = remoteIdStr.toLong()
+        var name = ""
+        var color = ""
+        var icon = ""
+        if (json.has("color") && !json.isNull("color")) {
+            color = json.getString("color")
+        }
+        if (json.has("icon") && !json.isNull("icon")) {
+            icon = json.getString("icon")
+        }
+        if (json.has("name") && !json.isNull("name")) {
+            name = json.getString("name")
+        }
+        return DBCategory(0, remoteId, projId, name, icon, color)
+    }
+
+    @Throws(JSONException::class)
+    protected fun getPaymentModesFromJSON(json: JSONObject, projId: Long): List<DBPaymentMode> {
+        val paymentModes: MutableList<DBPaymentMode> = ArrayList()
+        if (json.has("paymentmodes") && json.get("paymentmodes") is JSONObject) {
+            val jsonPms = json.getJSONObject("paymentmodes")
+            val keys = jsonPms.keys()
+            while (keys.hasNext()) {
+                val key = keys.next()
+                if (jsonPms.get(key) is JSONObject) {
+                    paymentModes.add(getPaymentModeFromJSON(jsonPms.getJSONObject(key), key, projId))
+                }
+            }
+        }
+        return paymentModes
+    }
+
+    @Throws(JSONException::class)
+    protected fun getPaymentModeFromJSON(json: JSONObject, remoteIdStr: String, projId: Long): DBPaymentMode {
+        val remoteId = remoteIdStr.toLong()
+        var name = ""
+        var color = ""
+        var icon = ""
+        if (json.has("color") && !json.isNull("color")) {
+            color = json.getString("color")
+        }
+        if (json.has("icon") && !json.isNull("icon")) {
+            icon = json.getString("icon")
+        }
+        if (json.has("name") && !json.isNull("name")) {
+            name = json.getString("name")
+        }
+        return DBPaymentMode(0, remoteId, projId, name, icon, color)
+    }
+
+    @Throws(JSONException::class)
+    protected fun getCurrenciesFromJSON(json: JSONObject, projId: Long): List<DBCurrency> {
+        val currencies: MutableList<DBCurrency> = ArrayList()
+        if (json.has("currencies") && json.get("currencies") is JSONArray) {
+            val jsonCurs = json.getJSONArray("currencies")
+            for (i in 0 until jsonCurs.length()) {
+                if (jsonCurs.get(i) is JSONObject) {
+                    currencies.add(getCurrencyFromJSON(jsonCurs.getJSONObject(i), projId))
+                }
+            }
+        }
+        return currencies
+    }
+
+    @Throws(JSONException::class)
+    protected fun getCurrencyFromJSON(json: JSONObject, projId: Long): DBCurrency {
+        var remoteId: Long = 0
+        var name = ""
+        var exchangeRate = 1.0
+        if (json.has("exchange_rate") && !json.isNull("exchange_rate")) {
+            exchangeRate = json.getDouble("exchange_rate")
+        }
+        if (json.has("id") && !json.isNull("id")) {
+            remoteId = json.getLong("id")
+        }
+        if (json.has("name") && !json.isNull("name")) {
+            name = json.getString("name")
+        }
+        return DBCurrency(0, remoteId, projId, name, exchangeRate, DBBill.STATE_OK)
+    }
+
+    @Throws(JSONException::class)
+    protected fun getMembersFromJSON(json: JSONObject, projId: Long): List<DBMember> {
+        val members: MutableList<DBMember> = ArrayList()
+        if (json.has("members")) {
+            val jsonMs = json.getJSONArray("members")
+            for (i in 0 until jsonMs.length()) {
+                val jsonM = jsonMs.getJSONObject(i)
+                members.add(getMemberFromJSON(jsonM, projId))
+            }
+        }
+        return members
+    }
+
+    @Throws(JSONException::class)
+    protected fun getMemberFromJSON(json: JSONObject, projId: Long): DBMember {
+        var activated = true
+        var weight = 1.0
+        var remoteId: Long = 0
+        var name = ""
+        var r: Int? = null
+        var g: Int? = null
+        var b: Int? = null
+        var ncUserId: String? = null
+        if (!json.isNull("id")) {
+            remoteId = json.getLong("id")
+        }
+        if (!json.isNull("weight")) {
+            weight = json.getDouble("weight")
+        }
+        if (!json.isNull("activated")) {
+            activated = json.getBoolean("activated")
+        }
+        if (!json.isNull("name")) {
+            name = json.getString("name")
+        }
+        if (json.has("color") && !json.isNull("color")) {
+            val obj = json.get("color")
+            if (obj is String) {
+                val color = json.getString("color").replace("#", "")
+                if (color.length == 6) {
+                    r = color.substring(0, 2).toInt(16)
+                    g = color.substring(2, 4).toInt(16)
+                    b = color.substring(4, 6).toInt(16)
+                }
+            } else if (obj is JSONObject) {
+                val color = json.getJSONObject("color")
+                if (color.has("r") && !color.isNull("r")) {
+                    r = color.getInt("r")
+                }
+                if (color.has("g") && !color.isNull("g")) {
+                    g = color.getInt("g")
+                }
+                if (color.has("b") && !color.isNull("b")) {
+                    b = color.getInt("b")
+                }
+            }
+        }
+        if (json.has("userid") && !json.isNull("userid")) {
+            ncUserId = json.getString("userid")
+        }
+        return DBMember(
+            0, remoteId, projId, name, activated, weight, DBBill.STATE_OK,
+            r, g, b, ncUserId, null
+        )
+    }
+
+    @Throws(JSONException::class)
+    protected fun getAllBillIdsFromJSON(json: JSONObject): List<Long> {
+        val billIds: MutableList<Long> = ArrayList()
+        if (json.has("allBillIds") && !json.isNull("allBillIds")) {
+            val jsonBillIds = json.getJSONArray("allBillIds")
+            for (i in 0 until jsonBillIds.length()) {
+                billIds.add(jsonBillIds.getLong(i))
+            }
+        }
+        return billIds
+    }
+
+    @Throws(JSONException::class)
+    protected fun getSyncTimestampFromJSON(json: JSONObject): Long {
+        var ts = 0L
+        if (json.has("timestamp") && !json.isNull("timestamp")) {
+            ts = json.getLong("timestamp")
+        }
+        return ts
+    }
+
+    @Throws(JSONException::class)
+    protected fun getBillsFromJSONArray(
+        json: JSONArray,
+        projId: Long,
+        memberRemoteIdToId: Map<Long, Long>
+    ): List<DBBill> {
+        val bills: MutableList<DBBill> = ArrayList()
+        for (i in 0 until json.length()) {
+            val jsonBill = json.getJSONObject(i)
+            bills.add(getBillFromJSON(jsonBill, projId, memberRemoteIdToId))
+        }
+        return bills
+    }
+
+    @Throws(JSONException::class)
+    protected fun getBillsFromJSONObject(
+        json: JSONObject,
+        projId: Long,
+        memberRemoteIdToId: Map<Long, Long>
+    ): List<DBBill> {
+        val bills: List<DBBill>
+        if (json.has("bills") && !json.isNull("bills")) {
+            val jsonBills = json.getJSONArray("bills")
+            bills = getBillsFromJSONArray(jsonBills, projId, memberRemoteIdToId)
+        } else {
+            bills = ArrayList()
+        }
+        return bills
+    }
+
+    @Throws(JSONException::class)
+    protected fun getBillFromJSON(
+        json: JSONObject,
+        projId: Long,
+        memberRemoteIdToId: Map<Long, Long>
+    ): DBBill {
+        var remoteId: Long = 0
+        var payerRemoteId: Long
+        var payerId: Long = 0
+        var amount = 0.0
+        var dateStr: String
+        var date: Date
+        var timestamp: Long = 0
+        var what = ""
+        var comment = ""
+        var repeat = DBBill.NON_REPEATED
+        var paymentMode = DBBill.PAYMODE_NONE
+        var paymentModeRemoteId = DBBill.PAYMODE_ID_NONE
+        var categoryId = DBBill.CATEGORY_NONE
+        if (!json.isNull("id")) {
+            remoteId = json.getLong("id")
+        }
+        if (!json.isNull("payer_id")) {
+            payerRemoteId = json.getLong("payer_id")
+            payerId = memberRemoteIdToId[payerRemoteId] ?: 0
+        } else if (!json.isNull("payer")) {
+            payerRemoteId = json.getLong("payer")
+            payerId = memberRemoteIdToId[payerRemoteId] ?: 0
+        }
+        if (!json.isNull("amount")) {
+            amount = json.getDouble("amount")
+        }
+        // get timestamp in priority
+        if (!json.isNull("timestamp")) {
+            timestamp = json.getLong("timestamp")
+        } else if (!json.isNull("date")) {
+            dateStr = json.getString("date")
+            try {
+                date = sdf.parse(dateStr)!!
+                timestamp = date.time / 1000
+            } catch (_: Exception) {
+                timestamp = 0
+            }
+        }
+        if (!json.isNull("what")) {
+            what = json.getString("what")
+        } else if (!json.isNull("label")) {
+            what = json.getString("label")
+        }
+        if (!json.isNull("comment")) {
+            comment = json.getString("comment")
+        }
+        if (json.has("repeat") && !json.isNull("repeat")) {
+            repeat = json.getString("repeat")
+        }
+        if (json.has("paymentmode") && !json.isNull("paymentmode")) {
+            paymentMode = json.getString("paymentmode")
+        }
+        if (json.has("categoryid") && !json.isNull("categoryid")) {
+            categoryId = json.getInt("categoryid")
+            Log.d("PLOP", "LOADED CATTTTTTTTTTTT $categoryId")
+        }
+        if (json.has("paymentmodeid") && !json.isNull("paymentmodeid")) {
+            paymentModeRemoteId = json.getInt("paymentmodeid")
+        }
+        // old MB, new Cospend is ok as Cospend provides the old pm ID
+        // new MB, old Cospend => set payment mode ID from old one
+        if (DBBill.PAYMODE_NONE != paymentMode && "" != paymentMode && paymentModeRemoteId == DBBill.PAYMODE_ID_NONE) {
+            Log.d("PaymentMode", "old: $paymentMode and new: 0")
+            paymentModeRemoteId = DBBill.oldPmIdToNew[paymentMode] ?: DBBill.PAYMODE_ID_NONE
+        }
+        val bill = DBBill(
+            0, remoteId, projId, payerId, amount, timestamp, what,
+            DBBill.STATE_OK, repeat, paymentMode, categoryId, comment, paymentModeRemoteId
+        )
+        bill.billOwers = getBillOwersFromJson(json, memberRemoteIdToId)
+        return bill
+    }
+
+    @Throws(JSONException::class)
+    protected fun getBillOwersFromJson(
+        json: JSONObject,
+        memberRemoteIdToId: Map<Long, Long>
+    ): List<DBBillOwer> {
+        val billOwers: MutableList<DBBillOwer> = ArrayList()
+        if (json.has("owers")) {
+            val jsonOs = json.getJSONArray("owers")
+            for (i in 0 until jsonOs.length()) {
+                val obj = jsonOs.get(i)
+                val memberRemoteId = if (obj is JSONObject) {
+                    obj.getLong("id")
+                } else {
+                    jsonOs.getLong(i)
+                }
+                val memberLocalId = memberRemoteIdToId[memberRemoteId] ?: 0
+                billOwers.add(DBBillOwer(0, 0, memberLocalId))
+            }
+        }
+        return billOwers
+    }
+
+    @Throws(JSONException::class)
+    protected fun getAccountProjectsFromJSONArray(jsonMs: JSONArray, ncUrl: String): List<DBAccountProject> {
+        val accountProjects: MutableList<DBAccountProject> = ArrayList()
+        for (i in 0 until jsonMs.length()) {
+            val jsonAP = jsonMs.getJSONObject(i)
+            accountProjects.add(getAccountProjectFromJSON(jsonAP, ncUrl))
+        }
+        return accountProjects
+    }
+
+    @Throws(JSONException::class)
+    protected fun getAccountProjectFromJSON(json: JSONObject, accountNcUrl: String): DBAccountProject {
+        var remoteId = ""
+        var name = ""
+        var ncUrl = ""
+        if (!json.isNull("name")) {
+            name = json.getString("name")
+        }
+        if (!json.isNull("id")) {
+            remoteId = json.getString("id")
+        }
+        if (!json.isNull("ncurl")) {
+            ncUrl = json.getString("ncUrl")
+        }
+        val archivedTs: Long? = getArchivedTsFromJSON(json)
+        if (ncUrl.isEmpty()) {
+            ncUrl = accountNcUrl
+        }
+        return DBAccountProject(0, remoteId, null, name, ncUrl, archivedTs)
+    }
+
+    @Throws(IOException::class)
+    protected fun getColorFromContent(content: String): String? {
+        var result: String? = null
+        try {
+            val dbf = DocumentBuilderFactory.newInstance()
+            val db = dbf.newDocumentBuilder()
+            val stream: InputStream = ByteArrayInputStream(content.toByteArray())
+            val doc = db.parse(stream)
+            doc.documentElement.normalize()
+            // Locate the Tag Name
+            val nodeList = doc.getElementsByTagName("color")
+            if (nodeList.length > 0) {
+                result = nodeList.item(0).textContent
+                Log.i(TAG, "I GOT THE COLOR from server: $result")
+            }
+        } catch (_: ParserConfigurationException) {
+        } catch (_: SAXException) {
+        }
+        return result
+    }
+
+    protected fun getColorFromJsonContent(json: JSONObject): String? {
+        return try {
+            val ocs = json.getJSONObject("ocs")
+            val data = ocs.getJSONObject("data")
+            val capabilities = data.getJSONObject("capabilities")
+            val theming = capabilities.getJSONObject("theming")
+            val color = theming.getString("color")
+            Log.i(TAG, "I GOT THE COLOR from server's JSON response: $color")
+            color
+        } catch (e: JSONException) {
+            Log.e(TAG, "Failed to get the color from OCS capabilities response $e")
+            null
+        }
+    }
+
+    protected fun getCospendVersionFromCapabilitiesContent(json: JSONObject): String? {
+        return try {
+            val ocs = json.getJSONObject("ocs")
+            val data = ocs.getJSONObject("data")
+            val capabilities = data.getJSONObject("capabilities")
+            val cospend = capabilities.getJSONObject("cospend")
+            val version = cospend.getString("version")
+            Log.i(TAG, "I GOT THE Cospend version: $version")
+            version
+        } catch (e: JSONException) {
+            Log.i(TAG, "Failed to get the Cospend version$e")
+            null
+        }
+    }
+
+    @Throws(JSONException::class)
+    protected fun getRemoteMemberIdFromJSON(json: JSONObject): Long {
+        return json.getLong("id")
+    }
+
+    companion object {
+        private val TAG = ServerResponse::class.java.simpleName
+    }
+}

app/src/main/java/net/helcel/cowspent/util/SupportUtil.kt

@@ -0,0 +1,338 @@
+package net.helcel.cowspent.util
+
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.content.Context
+import android.content.pm.PackageManager
+import android.util.Log
+import net.helcel.cowspent.model.*
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import org.json.JSONException
+import org.json.JSONObject
+import java.io.IOException
+import java.net.HttpURLConnection
+import java.net.MalformedURLException
+import java.net.URL
+import java.security.KeyManagementException
+import java.security.NoSuchAlgorithmException
+import java.text.NumberFormat
+import java.util.Locale
+import javax.net.ssl.HttpsURLConnection
+import javax.net.ssl.SSLContext
+import kotlin.math.abs
+import kotlin.math.max
+import kotlin.math.round
+
+object SupportUtil {
+
+    @JvmField
+    val normalNumberFormat: NumberFormat = NumberFormat.getInstance()
+
+    @JvmField
+    val dotNumberFormat: NumberFormat = NumberFormat.getNumberInstance(Locale.UK)
+
+    @JvmField
+    val commaNumberFormat: NumberFormat = NumberFormat.getNumberInstance(Locale.GERMANY)
+
+    init {
+        normalNumberFormat.maximumFractionDigits = 2
+        normalNumberFormat
+        dotNumberFormat.maximumFractionDigits = Int.MAX_VALUE
+        dotNumberFormat.isGroupingUsed = false
+        commaNumberFormat.maximumFractionDigits = Int.MAX_VALUE
+        commaNumberFormat.isGroupingUsed = false
+    }
+
+    @JvmStatic
+    @Throws(MalformedURLException::class, IOException::class)
+    fun getHttpURLConnection(strUrl: String): HttpURLConnection {
+        val url = URL(strUrl)
+        val httpCon = url.openConnection() as HttpURLConnection
+        if (url.protocol == "https") {
+            val httpsCon = httpCon as HttpsURLConnection
+            try {
+                val sslContext = SSLContext.getInstance("TLS")
+                sslContext.init(null, null, null)
+                httpsCon.sslSocketFactory = sslContext.socketFactory
+            } catch (e: NoSuchAlgorithmException) {
+                Log.e(SupportUtil::class.java.simpleName, "Exception", e)
+            } catch (e: KeyManagementException) {
+                Log.e(SupportUtil::class.java.simpleName, "Exception", e)
+            }
+        }
+        return httpCon
+    }
+
+    @JvmStatic
+    fun isDouble(s: String?): Boolean {
+        if (s == null) return false
+        return try {
+            s.toDouble()
+            true
+        } catch (_: NumberFormatException) {
+            false
+        }
+    }
+
+    @JvmStatic
+    fun isValidEmail(target: CharSequence?): Boolean {
+        return if (target == null) false else android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches()
+    }
+
+    @JvmStatic
+    fun getStatsOfProject(
+        projId: Long, db: CowspentSQLiteOpenHelper,
+        membersNbBills: MutableMap<Long, Int>,
+        membersBalance: MutableMap<Long, Double>,
+        membersPaid: MutableMap<Long, Double>,
+        membersSpent: MutableMap<Long, Double>,
+        catId: Int, paymentModeId: Int,
+        dateMin: String?, dateMax: String?
+    ): Int {
+        return getStats(
+            db.getMembersOfProject(projId, null),
+            db.getBillsOfProject(projId),
+            membersNbBills, membersBalance, membersPaid, membersSpent,
+            catId, paymentModeId, dateMin, dateMax
+        )
+    }
+
+    @JvmStatic
+    fun getStats(
+        dbMembers: List<DBMember>,
+        dbBills: List<DBBill>,
+        membersNbBills: MutableMap<Long, Int>,
+        membersBalance: MutableMap<Long, Double>,
+        membersPaid: MutableMap<Long, Double>,
+        membersSpent: MutableMap<Long, Double>,
+        catId: Int, paymentModeId: Int,
+        dateMin: String?, dateMax: String?
+    ): Int {
+        val nbBillsTotal = 0
+        val membersWeight: MutableMap<Long, Double> = HashMap()
+
+        // init
+        for (m in dbMembers) {
+            membersNbBills[m.id] = 0
+            membersBalance[m.id] = 0.0
+            membersPaid[m.id] = 0.0
+            membersSpent[m.id] = 0.0
+            membersWeight[m.id] = m.weight
+        }
+
+        for (b in dbBills) {
+            // don't take deleted bills and respect category filter
+            if (b.state != DBBill.STATE_DELETED &&
+                ((catId == -1000 || catId == -100 || b.categoryRemoteId == catId) &&
+                        (catId != -100 || b.categoryRemoteId != DBBill.CATEGORY_REIMBURSEMENT) &&
+                        (paymentModeId == -1000 || b.paymentModeRemoteId == paymentModeId)) &&
+                (dateMin == null || b.date >= dateMin) &&
+                (dateMax == null || b.date <= dateMax)
+            ) {
+                val nb = membersNbBills[b.payerId] ?: 0
+                membersNbBills[b.payerId] = nb + 1
+                val amount = b.amount
+                val balPayer = membersBalance[b.payerId] ?: 0.0
+                membersBalance[b.payerId] = balPayer + amount
+                val paid = membersPaid[b.payerId] ?: 0.0
+                membersPaid[b.payerId] = paid + amount
+                
+                var nbOwerShares = 0.0
+                for (bo in b.billOwers) {
+                    nbOwerShares += membersWeight[bo.memberId] ?: 0.0
+                }
+                for (bo in b.billOwers) {
+                    val owerWeight = membersWeight[bo.memberId] ?: 0.0
+                    val spent = if (nbOwerShares > 0) amount / nbOwerShares * owerWeight else 0.0
+                    val balOwer = membersBalance[bo.memberId] ?: 0.0
+                    membersBalance[bo.memberId] = balOwer - spent
+                    val spentOwer = membersSpent[bo.memberId] ?: 0.0
+                    membersSpent[bo.memberId] = spentOwer + spent
+                }
+            }
+        }
+        return nbBillsTotal
+    }
+
+    @JvmStatic
+    fun round2(n: Double): Double {
+        var r = round(abs(n) * 100.0) / 100.0
+        if (n < 0.0) r = -r
+        return r
+    }
+
+    const val SETTLE_OPTIMAL: Long = 0
+
+    @JvmStatic
+    fun settleBills(
+        members: List<DBMember>, membersBalance: Map<Long, Double>,
+        centerOnMemberId: Long
+    ): List<Transaction> {
+        return if (centerOnMemberId == SETTLE_OPTIMAL) {
+            settleBillsOptimal(members, membersBalance)
+        } else {
+            val results: MutableList<Transaction> = ArrayList()
+            for (mid in membersBalance.keys) {
+                if (mid != centerOnMemberId) {
+                    val balance = membersBalance[mid] ?: 0.0
+                    if (balance > 0.0) {
+                        results.add(Transaction(centerOnMemberId, mid, balance))
+                    } else if (balance < 0.0) {
+                        results.add(Transaction(mid, centerOnMemberId, -balance))
+                    }
+                }
+            }
+            results
+        }
+    }
+
+    @JvmStatic
+    fun settleBillsOptimal(members: List<DBMember>, membersBalance: Map<Long, Double>): List<Transaction> {
+        val crediters: MutableList<CreditDebt> = ArrayList()
+        val debiters: MutableList<CreditDebt> = ArrayList()
+
+        // Create lists of credits and debts
+        for (m in members) {
+            val memberId = m.id
+            val balance = membersBalance[memberId] ?: 0.0
+
+            if (round2(balance) > 0.0) {
+                crediters.add(CreditDebt(memberId, balance))
+            } else if (round2(balance) < 0.0) {
+                debiters.add(CreditDebt(memberId, balance))
+            }
+        }
+
+        return reduceBalance(crediters, debiters, null)
+    }
+
+    @JvmStatic
+    fun reduceBalance(
+        crediters: MutableList<CreditDebt>,
+        debiters: MutableList<CreditDebt>,
+        resultsParam: MutableList<Transaction>?
+    ): List<Transaction> {
+        var results = resultsParam
+        if (debiters.isEmpty() || crediters.isEmpty()) {
+            return results ?: emptyList()
+        }
+
+        if (results == null) {
+            results = ArrayList()
+        }
+
+        crediters.sortWith { cd2, cd1 ->
+            if (cd1.balance == cd2.balance) {
+                0
+            } else {
+                if (cd1.balance < cd2.balance) 1 else -1
+            }
+        }
+        
+        for (c in crediters) {
+            Log.e(SupportUtil::class.java.simpleName, "* " + c.memberId + " : " + c.balance)
+        }
+        
+        debiters.sortWith { cd2, cd1 ->
+            if (cd1.balance == cd2.balance) {
+                0
+            } else {
+                if (cd1.balance > cd2.balance) 1 else -1
+            }
+        }
+
+        val deb = debiters.removeAt(debiters.size - 1)
+        val debiter = deb.memberId
+        val debiterBalance = deb.balance
+
+        val cred = crediters.removeAt(crediters.size - 1)
+        val crediter = cred.memberId
+        val crediterBalance = cred.balance
+
+        val amount: Double = if (abs(debiterBalance) > abs(crediterBalance)) {
+            abs(crediterBalance)
+        } else {
+            abs(debiterBalance)
+        }
+
+        results.add(Transaction(debiter, crediter, amount))
+
+        val newDebiterBalance = debiterBalance + amount
+        if (newDebiterBalance < 0.0) {
+            debiters.add(CreditDebt(debiter, newDebiterBalance))
+            debiters.sortWith { cd2, cd1 ->
+                if (cd1.balance == cd2.balance) {
+                    0
+                } else {
+                    if (cd1.balance > cd2.balance) 1 else -1
+                }
+            }
+        }
+
+        val newCrediterBalance = crediterBalance - amount
+        if (newCrediterBalance > 0.0) {
+            crediters.add(CreditDebt(crediter, newCrediterBalance))
+            crediters.sortWith { cd2, cd1 ->
+                if (cd1.balance == cd2.balance) {
+                    0
+                } else {
+                    if (cd1.balance < cd2.balance) 1 else -1
+                }
+            }
+        }
+
+        return reduceBalance(crediters, debiters, results)
+    }
+
+    @JvmStatic
+    fun getVersionName(context: Context): String {
+        var versionName = "0.0.0"
+        try {
+            val pInfo = context.packageManager.getPackageInfo(context.packageName, 0)
+            versionName = pInfo.versionName ?: "0.0.0"
+        } catch (e: PackageManager.NameNotFoundException) {
+            e.printStackTrace()
+        }
+        return versionName
+    }
+
+    @JvmStatic
+    fun getJsonObject(text: String?): JSONObject? {
+        if (text == null) return null
+        return try {
+            JSONObject(text)
+        } catch (_: JSONException) {
+            null
+        }
+    }
+
+    @JvmStatic
+    fun compareVersions(version1: String, version2: String): Int {
+        val levels1 = version1.split("\\.".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
+        val levels2 = version2.split("\\.".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
+        val length = max(levels1.size, levels2.size)
+        for (i in 0 until length) {
+            val v1 = if (i < levels1.size) levels1[i].toInt() else 0
+            val v2 = if (i < levels2.size) levels2[i].toInt() else 0
+            val compare = v1.compareTo(v2)
+            if (compare != 0) {
+                return compare
+            }
+        }
+        return 0
+    }
+
+    @JvmStatic
+    fun getAppVersionName(context: Context): String {
+        var versionName = "???"
+        try {
+            val pInfo = context.packageManager.getPackageInfo(context.packageName, 0)
+            versionName = pInfo.versionName ?: "0.0.0"
+        } catch (e: PackageManager.NameNotFoundException) {
+            Log.e(SupportUtil::class.java.simpleName, "Failed to get app version name", e)
+            e.printStackTrace()
+        }
+        Log.d(SupportUtil::class.java.simpleName, "app version name is $versionName")
+        return versionName
+    }
+}

app/src/main/java/net/helcel/cowspent/util/evalMath.kt

@@ -0,0 +1,21 @@
+package net.helcel.cowspent.util
+import android.database.sqlite.SQLiteDatabase
+
+fun evalMath(expression: String): Double {
+    var result = 0.0
+    var db: SQLiteDatabase? = null
+    try {
+        // Opens a temporary, in-memory system database block
+        db = SQLiteDatabase.create(null)
+        val cursor = db.rawQuery("SELECT ($expression);", null)
+        if (cursor.moveToFirst()) {
+            result = cursor.getDouble(0)
+        }
+        cursor.close()
+    } catch (e: Exception) {
+        e.printStackTrace()
+    } finally {
+        db?.close()
+    }
+    return result
+}

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="100"
+    android:viewportHeight="100">
+    <!-- Matches #0F172A Base -->
+    <path
+        android:pathData="M0,0h100v100h-100z"
+        android:fillColor="#0F172A"/>
+</vector>

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,61 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="72"
+    android:viewportHeight="72">
+  <group android:translateY="0.33333334">
+    <group android:translateY="-0.33333334">
+      <group android:scaleX="0.63461536"
+          android:scaleY="0.63461536"
+          android:translateX="13.153846"
+          android:translateY="13.153846">
+        <path
+            android:fillColor="#FFD700"
+            android:pathData="M36,2 C17.22,2 2,17.22 2,36 C2,54.78 17.22,70 36,70 C54.78,70 70,54.78 70,36 C70,17.22 54.78,2 36,2 Z" />
+
+        <!-- Inner Face (Expanded path) -->
+        <path
+            android:fillColor="#DAA520"
+            android:pathData="M36,8 C20.54,8 8,20.54 8,36 C8,51.46 20.54,64 36,64 C51.46,64 64,51.46 64,36 C64,20.54 51.46,8 36,8 Z" />
+
+        <!-- Center Detail (Pure path replacement for the center circle) -->
+        <path
+            android:fillColor="#FFD700"
+            android:pathData="M36,22 C28.27,22 22,28.27 22,36 C22,43.73 28.27,50 36,50 C43.73,50 50,43.73 50,36 C50,28.27 43.73,22 36,22 Z" />
+
+
+        <group android:name="color">
+            <path android:fillColor="#fff" android:pathData="m15,12.0211h0c0,.6116.3056,1.1827.8145,1.5219l4.2449,2.83c.5764.3843,1.774.8721,1.688,1.5596l-1.7051,6.7284c-.028.2241-.0143.4514.0405.6705l1.8343,7.3371c.0548.2191.0685.4464.0405.6705l-.9152,7.322c-.028.2241-.0143.4514.0405.6705l1.7456,6.9825c.1104.4414.3813.8259.7599,1.0783l1.7312,1.1541c.433.2887.7225.7481.7961,1.2632l-.2598,3.7979s-.2916,3.1088,2.3012,6.051c1.6332,1.8533,5.7148,3.8846,8.2656,3.8847,3.3409,0,5.9547-1.9378,7.3949-3.6465.8914-1.0576,2.5398-2.4978,3.2821-5.8244.2014-.9023-.0996-3.6967-.0996-3.6967,0-.2477.4009-1.311.4985-1.5386l1.3063-2.5077c.0158-.0369.0264-.0595.0389-.0795.5394-.8642.7885-1.8786.8851-2.8927,0,0,.9043-4.9747,1.1585-6.6406.005-.0325-.4996-5.5158-.4953-5.5485l1.5496-6.8172c.0386-.2315.0323-.4683-.0187-.6975l-1.5364-6.9139c-.2151-.9678.3801-1.9308,1.3419-2.1712l1.6416-.4104c.4075-.1019.7676-.341,1.0196-.677l2.2445-2.9927c.2375-.3166.3658-.7017.3658-1.0974v-.1102c0-1.1701-1.1152-1.1434-2.2575-.8896l-6.191.4868c-.3593.0798-.7343.0494-1.0761-.0873l-4.3602-1.7441c-.0767-.0307-.1555-.0562-.2357-.0762l-7.3628-1.8407c-.3375-.0844-.692-.0708-1.022.0393l-5.3714,1.7905c-.0821.0274-.1622.0605-.2396.0992l-3.4104,1.7052c-.3092.1546-.656.2184-1,.184l-7.4623-.7462c-1.0768-.1077-2.0111.7379-2.0111,1.82Z"/>
+            <path android:fillColor="#a57939" android:pathData="m65.1818,16.5746l-3.5658.2422c-.1304.0089-.2591.0347-.3828.077l-7.081,2.42c-.043.0147-.0854.0314-.1269.0499l-2.6409,1.1807c-.1171.0524-.2341.0883-.3607.1091-1.3737.2264-10.1731,1.8874-10.0194,7.2658,0,0-.4646,3.6003,1.951,6.1473,1.8803,1.9826,2.9889,4.6478,2.5192,7.3395-.3101,1.7768-1.2515,3.5306-3.4702,4.594h0l2.9104,1.0217c.4295.1508.767.4887.9174.9183l1.4763,4.2192,1.6616-1.7712c1.1136-1.1945,1.9689-5.8742,1.9689-5.8742.4855-3.6065.5032-7.264.0031-10.8685-.0148-.1064-.0287-.2031-.0417-.2889h0s1.2606-.965,1.2606-.965c.1608-.1231.3449-.2123.5411-.2622l5.5633-1.4149c.1716-.0436.3341-.1174.4799-.2177l4.3017-2.9608c.1811-.1247.3326-.2877.4436-.4775l2.6005-4.4465c.1016-.1737.1671-.3661.1927-.5658l.4849-3.7874c.1198-.9359-.6453-1.748-1.5867-1.6841Z"/>
+            <path android:fillColor="#a57939" android:pathData="m6.867,16.5746l3.5658.2422c.1304.0089.2591.0347.3828.077l7.081,2.42c.043.0147.0854.0314.1269.0499l2.6409,1.1807c.1171.0524.2341.0883.3607.1091,1.3737.2264,10.1731,1.8874,10.0194,7.2658,0,0,.4645,3.6003-1.951,6.1473-1.8803,1.9826-2.9889,4.6478-2.5192,7.3395.3101,1.7768,1.2515,3.5306,3.4702,4.594h0l-2.9104,1.0217c-.4295.1508-.767.4887-.9174.9183l-1.4763,4.2192-1.6616-1.7712c-1.1136-1.1945-2.0412-6.9083-2.0412-6.9083-.3413-3.1673-.1698-6.3689.5077-9.4817h0c.1234-.5672-.092-1.1546-.553-1.5075l-.4665-.3571c-.1858-.1422-.4024-.2389-.6323-.2824l-6.0587-1.1441c-.2049-.0387-.3994-.1197-.5711-.2379l-4.2616-2.9332c-.1811-.1247-.3326-.2877-.4436-.4775l-2.6005-4.4465c-.1016-.1737-.1671-.3661-.1927-.5657l-.485-3.7875c-.1198-.9359.6453-1.7481,1.5867-1.6841Z"/>
+            <path android:fillColor="#f4aa41" android:pathData="m27.3197,47.9945l-.6598,1.1318c-.7217,2.1691-.9617,4.4695-.7033,6.7408h0c.1194,1.0495.9592,1.871,2.0111,1.9674l.0811.0074,6.4963-.5146c1.249-.0989,2.5045-.0796,3.7499.0577l5.9262.6536c.7598.0838,1.5171-.1772,2.064-.7112h0c.4669-.4559.7436-1.0718.7746-1.7237l.0484-1.0203c.1133-2.3893-.4008-4.7667-1.4912-6.8958h0c-.4317-.843-1.2874-1.3848-2.234-1.4148l-8.6286-.2728h-3.9632c-1.4296,0-2.7515.7595-3.4715,1.9945Z"/>
+
+        </group>
+        <group android:name="line">
+            <path android:fillColor="#000" android:pathData="m26.1616,31.0595s-3.0474-.219-3.8284-1-.781-2.0474,0-2.8284,2.0474-.781,2.8284,0c.7811.781,1,3.8284,1,3.8284Z"/>
+            <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m19.6191,26.2353l2.0377-9.248s-7.6806-.627-6.505-7.4454c0,0,9.9534,3.2917,12.7748.4702,0,0,6.2375-6.6642,16.1956-.0429,3.3226,2.2093,12.7748-.4702,12.7748-.4702,1.1756,6.8184-6.505,7.4454-6.505,7.4454l2.0377,9.248"/>
+            <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m28.4825,46h15.7265c.272,0,.5324.1138.7082.3213.8467.9992,3.1442,4.3471,2.0943,10.2966-.1836,1.0404-1.1647,1.7418-2.2037,1.5503-3.4759-.6406-11.324-1.7893-16.7592-.3263-1.1058.2976-2.2065-.454-2.3432-1.5909-.302-2.5115-.3157-6.6284,2.0103-9.8682.1751-.2438.4667-.3828.7668-.3828Z"/>
+            <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m29.8671,50.277s-.6865,2.855,3.1538,2.926"/>
+            <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m29.1276,61.4663s6.3482,7.9157,13.7936.3135"/>
+            <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m17.5177,20.1544c-3.0642-1.9576-7.3791-4.5873-12.4353-3.3426,0,0-1.4891,14.0288,15.3611,15.5179l1.2133.881s-2.2906,8.9177,1.2618,16.1018"/>
+            <path android:fillColor="#000" android:pathData="m45.8871,31.0139s3.0474-.219,3.8284-1c.7811-.781.7811-2.0474,0-2.8284-.781-.781-2.0474-.781-2.8284,0-.781.781-1,3.8284-1,3.8284Z"/>
+            <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m43.1817,50.2341s.6865,2.855-3.1538,2.926"/>
+            <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m54.7743,19.9585c3.0474-1.888,7.2683-4.4017,12.1921-3.1896,0,0,1.4891,14.0288-15.3611,15.5179l-1.2133.881s2.5382,7.9772-1.0141,15.1613"/>
+        </group>
+
+
+        <!-- Massive Background Coin Base -->
+        <path
+            android:pathData="M 256,76 A 180,180 0 1,1 255.9,76 Z"
+            android:fillColor="#FBBF24"/>
+
+        <!-- Coin Decorative Dotted Inner Rim -->
+        <path
+            android:pathData="M 256,101 A 155,155 0 1,1 255.9,101 Z"
+            android:strokeColor="#D97706"
+            android:strokeWidth="4"/>
+
+      </group>
+    </group>
+  </group>
+</vector>

app/src/main/res/drawable/test.xml

@@ -0,0 +1,52 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="128dp"
+    android:height="128dp"
+    android:viewportWidth="72"
+    android:viewportHeight="72">
+    <path
+        android:fillColor="#FFD700"
+        android:pathData="M36,2 C17.22,2 2,17.22 2,36 C2,54.78 17.22,70 36,70 C54.78,70 70,54.78 70,36 C70,17.22 54.78,2 36,2 Z" />
+
+    <!-- Inner Face (Expanded path) -->
+    <path
+        android:fillColor="#DAA520"
+        android:pathData="M36,8 C20.54,8 8,20.54 8,36 C8,51.46 20.54,64 36,64 C51.46,64 64,51.46 64,36 C64,20.54 51.46,8 36,8 Z" />
+
+    <!-- Center Detail (Pure path replacement for the center circle) -->
+    <path
+        android:fillColor="#FFD700"
+        android:pathData="M36,22 C28.27,22 22,28.27 22,36 C22,43.73 28.27,50 36,50 C43.73,50 50,43.73 50,36 C50,28.27 43.73,22 36,22 Z" />
+
+
+    <group android:name="color">
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+        <path android:fillColor="#a57939" android:pathData="m6.867,16.5746l3.5658.2422c.1304.0089.2591.0347.3828.077l7.081,2.42c.043.0147.0854.0314.1269.0499l2.6409,1.1807c.1171.0524.2341.0883.3607.1091,1.3737.2264,10.1731,1.8874,10.0194,7.2658,0,0,.4645,3.6003-1.951,6.1473-1.8803,1.9826-2.9889,4.6478-2.5192,7.3395.3101,1.7768,1.2515,3.5306,3.4702,4.594h0l-2.9104,1.0217c-.4295.1508-.767.4887-.9174.9183l-1.4763,4.2192-1.6616-1.7712c-1.1136-1.1945-2.0412-6.9083-2.0412-6.9083-.3413-3.1673-.1698-6.3689.5077-9.4817h0c.1234-.5672-.092-1.1546-.553-1.5075l-.4665-.3571c-.1858-.1422-.4024-.2389-.6323-.2824l-6.0587-1.1441c-.2049-.0387-.3994-.1197-.5711-.2379l-4.2616-2.9332c-.1811-.1247-.3326-.2877-.4436-.4775l-2.6005-4.4465c-.1016-.1737-.1671-.3661-.1927-.5657l-.485-3.7875c-.1198-.9359.6453-1.7481,1.5867-1.6841Z"/>
+        <path android:fillColor="#f4aa41" android:pathData="m27.3197,47.9945l-.6598,1.1318c-.7217,2.1691-.9617,4.4695-.7033,6.7408h0c.1194,1.0495.9592,1.871,2.0111,1.9674l.0811.0074,6.4963-.5146c1.249-.0989,2.5045-.0796,3.7499.0577l5.9262.6536c.7598.0838,1.5171-.1772,2.064-.7112h0c.4669-.4559.7436-1.0718.7746-1.7237l.0484-1.0203c.1133-2.3893-.4008-4.7667-1.4912-6.8958h0c-.4317-.843-1.2874-1.3848-2.234-1.4148l-8.6286-.2728h-3.9632c-1.4296,0-2.7515.7595-3.4715,1.9945Z"/>
+
+    </group>
+    <group android:name="line">
+        <path android:fillColor="#000" android:pathData="m26.1616,31.0595s-3.0474-.219-3.8284-1-.781-2.0474,0-2.8284,2.0474-.781,2.8284,0c.7811.781,1,3.8284,1,3.8284Z"/>
+        <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m19.6191,26.2353l2.0377-9.248s-7.6806-.627-6.505-7.4454c0,0,9.9534,3.2917,12.7748.4702,0,0,6.2375-6.6642,16.1956-.0429,3.3226,2.2093,12.7748-.4702,12.7748-.4702,1.1756,6.8184-6.505,7.4454-6.505,7.4454l2.0377,9.248"/>
+        <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m28.4825,46h15.7265c.272,0,.5324.1138.7082.3213.8467.9992,3.1442,4.3471,2.0943,10.2966-.1836,1.0404-1.1647,1.7418-2.2037,1.5503-3.4759-.6406-11.324-1.7893-16.7592-.3263-1.1058.2976-2.2065-.454-2.3432-1.5909-.302-2.5115-.3157-6.6284,2.0103-9.8682.1751-.2438.4667-.3828.7668-.3828Z"/>
+        <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m29.8671,50.277s-.6865,2.855,3.1538,2.926"/>
+        <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m29.1276,61.4663s6.3482,7.9157,13.7936.3135"/>
+        <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m17.5177,20.1544c-3.0642-1.9576-7.3791-4.5873-12.4353-3.3426,0,0-1.4891,14.0288,15.3611,15.5179l1.2133.881s-2.2906,8.9177,1.2618,16.1018"/>
+        <path android:fillColor="#000" android:pathData="m45.8871,31.0139s3.0474-.219,3.8284-1c.7811-.781.7811-2.0474,0-2.8284-.781-.781-2.0474-.781-2.8284,0-.781.781-1,3.8284-1,3.8284Z"/>
+        <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m43.1817,50.2341s.6865,2.855-3.1538,2.926"/>
+        <path android:strokeColor="#000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2" android:pathData="m54.7743,19.9585c3.0474-1.888,7.2683-4.4017,12.1921-3.1896,0,0,1.4891,14.0288-15.3611,15.5179l-1.2133.881s2.5382,7.9772-1.0141,15.1613"/>
+    </group>
+
+
+    <!-- Massive Background Coin Base -->
+    <path
+        android:pathData="M 256,76 A 180,180 0 1,1 255.9,76 Z"
+        android:fillColor="#FBBF24"/>
+
+    <!-- Coin Decorative Dotted Inner Rim -->
+    <path
+        android:pathData="M 256,101 A 155,155 0 1,1 255.9,101 Z"
+        android:strokeColor="#D97706"
+        android:strokeWidth="4"/>
+
+</vector>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+    <monochrome android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+    <monochrome android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/resources.properties

@@ -0,0 +1,2 @@
+# https://developer.android.com/guide/topics/resources/app-languages
+unqualifiedResLocale=en

app/src/main/res/values-night/booleans.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <bool name="isDayMode">false</bool>
+</resources>

app/src/main/res/values-night/colors.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="primary">#72D1FF</color>
+    <color name="on_primary">#000000</color>
+    <color name="accent">#72D1FF</color>
+    <color name="surface">#121212</color>
+    <color name="on_surface">#ffffff</color>
+    <color name="bg_normal">#121212</color>
+    <color name="fg_default">#ffffff</color>
+    <color name="fg_default_low">#aaaaaa</color>
+</resources>