gitignore & init

app/src/main/java/net/helcel/fidelity/activity/MainActivity.kt

@@ -0,0 +1,48 @@
+package net.helcel.fidelity.activity
+
+import android.content.Context
+import android.content.SharedPreferences
+import android.os.Bundle
+import androidx.activity.addCallback
+import androidx.appcompat.app.AppCompatActivity
+import net.helcel.fidelity.R
+import net.helcel.fidelity.activity.fragment.Launcher
+import net.helcel.fidelity.databinding.ActMainBinding
+import net.helcel.fidelity.tools.CacheManager
+
+class MainActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActMainBinding
+
+    private lateinit var sharedPreferences: SharedPreferences
+
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        sharedPreferences =
+            this.getSharedPreferences(CacheManager.PREF_NAME, Context.MODE_PRIVATE)
+        CacheManager.loadFidelity(sharedPreferences)
+
+        
+        binding = ActMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        onBackPressedDispatcher.addCallback(this) {
+            if (supportFragmentManager.backStackEntryCount > 0) {
+                supportFragmentManager.popBackStackImmediate()
+            } else {
+                finish()
+            }
+        }
+        if (savedInstanceState == null)
+            loadLauncher()
+
+    }
+
+    private fun loadLauncher() {
+        supportFragmentManager.beginTransaction()
+            .add(R.id.container, Launcher())
+            .commit()
+    }
+}
+