Add android application with onCreate hook

app/src/main/kotlin/com/github/gotify/GotifyApplication.kt

@@ -0,0 +1,31 @@
+package com.github.gotify
+
+import android.app.Application
+import android.app.NotificationManager
+import android.os.Build
+import androidx.preference.PreferenceManager
+import com.github.gotify.log.LoggerHelper
+import com.github.gotify.log.UncaughtExceptionHandler
+import com.github.gotify.settings.ThemeHelper
+import org.tinylog.kotlin.Logger
+
+class GotifyApplication : Application() {
+    override fun onCreate() {
+        LoggerHelper.init(this)
+        UncaughtExceptionHandler.registerCurrentThread()
+        Logger.info("${javaClass.simpleName}: onCreate")
+
+        val theme = PreferenceManager.getDefaultSharedPreferences(this)
+            .getString(getString(R.string.setting_key_theme), getString(R.string.theme_default))!!
+        ThemeHelper.setTheme(this, theme)
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            NotificationSupport.createForegroundChannel(
+                this,
+                this.getSystemService(NotificationManager::class.java)
+            )
+        }
+
+        super.onCreate()
+    }
+}

app/src/main/kotlin/com/github/gotify/init/InitializationActivity.kt

@@ -2,8 +2,6 @@ package com.github.gotify.init
 
 import android.Manifest
 import android.app.AlarmManager
-import android.app.NotificationManager
-import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import android.os.Build
@@ -13,8 +11,6 @@ import androidx.annotation.RequiresApi
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
-import androidx.preference.PreferenceManager
-import com.github.gotify.NotificationSupport
 import com.github.gotify.R
 import com.github.gotify.Settings
 import com.github.gotify.api.ApiException
@@ -23,12 +19,9 @@ import com.github.gotify.api.Callback.SuccessCallback
 import com.github.gotify.api.ClientFactory
 import com.github.gotify.client.model.User
 import com.github.gotify.client.model.VersionInfo
-import com.github.gotify.log.LoggerHelper
-import com.github.gotify.log.UncaughtExceptionHandler
 import com.github.gotify.login.LoginActivity
 import com.github.gotify.messages.MessagesActivity
 import com.github.gotify.service.WebSocketService
-import com.github.gotify.settings.ThemeHelper
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.livinglifetechway.quickpermissionskotlin.runWithPermissions
 import com.livinglifetechway.quickpermissionskotlin.util.QuickPermissionsOptions
@@ -48,18 +41,6 @@ internal class InitializationActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        LoggerHelper.init(this)
-        val theme = PreferenceManager.getDefaultSharedPreferences(this)
-            .getString(getString(R.string.setting_key_theme), getString(R.string.theme_default))!!
-        ThemeHelper.setTheme(this, theme)
-
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            NotificationSupport.createForegroundChannel(
-                this,
-                (this.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager)
-            )
-        }
-        UncaughtExceptionHandler.registerCurrentThread()
         settings = Settings(this)
         Logger.info("Entering ${javaClass.simpleName}")