android: fix lock not showing (#3181)

* android: fix lock not showing

* better fix

apps/multiplatform/android/src/main/java/chat/simplex/app/MainActivity.kt

@@ -91,11 +91,11 @@ class MainActivity: FragmentActivity() {
       // When pressed Back and there is no one wants to process the back event, clear auth state to force re-auth on launch
       AppLock.clearAuthState()
       AppLock.laFailed.value = true
-      AppLock.destroyedAfterBackPress.value = true
     }
     if (!onBackPressedDispatcher.hasEnabledCallbacks()) {
       // Drop shared content
       SimplexApp.context.chatModel.sharedContent.value = null
+      finish()
     }
   }
 }

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/UI.android.kt

@@ -69,3 +69,5 @@ actual fun hideKeyboard(view: Any?) {
     (androidAppContext.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager).hideSoftInputFromWindow(view.windowToken, 0)
   }
 }
+
+actual fun androidIsFinishingMainActivity(): Boolean = (mainActivity.get()?.isFinishing == true)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/App.kt

@@ -149,7 +149,7 @@ fun MainScreen() {
       LaunchedEffect(Unit) {
         // With these constrains when user presses back button while on ChatList, activity destroys and shows auth request
         // while the screen moves to a launcher. Detect it and prevent showing the auth
-        if (!(AppLock.destroyedAfterBackPress.value && chatModel.controller.appPrefs.laMode.get() == LAMode.SYSTEM)) {
+        if (!(androidIsFinishingMainActivity() && chatModel.controller.appPrefs.laMode.get() == LAMode.SYSTEM)) {
           AppLock.runAuthenticate()
         }
       }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/AppLock.kt

@@ -24,7 +24,6 @@ object AppLock {
 
   // Remember result and show it after orientation change
   val laFailed = mutableStateOf(false)
-  val destroyedAfterBackPress = mutableStateOf(false)
 
   fun clearAuthState() {
     userAuthorized.value = null

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/UI.kt

@@ -14,3 +14,5 @@ expect fun LocalMultiplatformView(): Any?
 @Composable
 expect fun getKeyboardState(): State<KeyboardState>
 expect fun hideKeyboard(view: Any?)
+
+expect fun androidIsFinishingMainActivity(): Boolean

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/UI.desktop.kt

@@ -17,3 +17,5 @@ actual fun LocalMultiplatformView(): Any? = null
 @Composable
 actual fun getKeyboardState(): State<KeyboardState> = remember { mutableStateOf(KeyboardState.Opened) }
 actual fun hideKeyboard(view: Any?) {}
+
+actual fun androidIsFinishingMainActivity(): Boolean = false