apps: Use OnBackPressedDispatcher instead of onBackPressed (c8d7c63b) · Commits · e / os / App Lounge

app/src/main/java/foundation/e/apps/ui/MainActivity.kt

+17 −14

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@ import android.os.Bundle
		import android.view.View
		import android.widget.Toast
		import android.window.OnBackInvokedDispatcher.PRIORITY_DEFAULT
		import androidx.activity.OnBackPressedCallback
		import androidx.appcompat.app.AppCompatActivity
		import androidx.lifecycle.Lifecycle
		import androidx.lifecycle.ViewModelProvider
		@@ -82,6 +83,20 @@ class MainActivity : AppCompatActivity() {
		override fun onCreate(savedInstanceState: Bundle?) {
		super.onCreate(savedInstanceState)

		// Add an OnBackPressedCallback to handle the back press
		onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
		override fun handleOnBackPressed() {
		if (isInitialScreen()) {
		resetIgnoreStatusForSessionRefresh()
		finish()
		} else {
		// Let the system handle the back press
		isEnabled = false
		onBackPressedDispatcher.onBackPressed()
		}
		}
		})

		binding = ActivityMainBinding.inflate(layoutInflater)

		setupBackPressHandlingForTiramisuAndAbove()
		@@ -148,19 +163,7 @@ class MainActivity : AppCompatActivity() {
		loginViewModel.startLoginFlow(listOf(PlayStoreAuthenticator::class.java.simpleName))
		}

		// In Android 12 (API level 32) and lower, onBackPressed is always called,
		// regardless of any registered instances of OnBackPressedCallback.
		// https://developer.android.com/guide/navigation/navigation-custom-back#onbackpressed
		@Deprecated("Deprecated in Java")
		override fun onBackPressed() {
		if (isInitialScreen()) {
		resetIgnoreStatusForSessionRefresh()
		finish()
		}
		super.onBackPressed()
		}

		private fun isInitialScreen(): Boolean {
		fun isInitialScreen(): Boolean {
		val navHostFragment =
		supportFragmentManager.findFragmentById(R.id.fragment) as NavHostFragment

		@@ -169,7 +172,7 @@ class MainActivity : AppCompatActivity() {
		return navController.currentDestination?.id == navController.graph.startDestinationId
		}

		private fun resetIgnoreStatusForSessionRefresh() {
		fun resetIgnoreStatusForSessionRefresh() {
		viewModel.shouldIgnoreSessionError = false
		}