I pass my activity’s reference to the task’s constructor using “this”, storing it in an instance and using it to create a dialog.Import Android.widget. Views have a reference to their parent Context (taken from constructor argument). The solution is to call dismiss() on the Dialog you created in NetErrorPage.java:114 before exiting the Activity, e.g. Here I want to show an AlertDialog in onPostExecute method of my AsyncTask. : View not attached to window manager at (WindowManagerImpl. Change this dialog.cancel() to dialog.dismiss(). Let us first create this scenario which causes the exception to be thrown, by using the following code. Open project Structure, you can find in File, set in Project: Android Gradle Plugin Version: 7.0.0 and Gradle Version: 7.0.2 Compile now and all will work fine. If you are trying to modify the UI from background thread (usually from onPostExecute() of AsyncTask) and if the activity enters finishing stage i.e.) explicitly calling finish(), user pressing home or back button or activity clean up made by Android then you get this error.Ī$BadTokenException: Unable to add window - token is not valid is your activity running?Īt (ViewRootImpl.java:585)Īt (WindowManagerImpl.java:326)Īt (WindowManagerImpl.java:224)Ī$CompatModeWrapper.addView(WindowManagerImpl.java:149)Īt $LocalWindowManager.addView(Window.java:547)Īt (Dialog.java:277)Ĭom.$LongTask.onPostExecute(MainActivity.java:72)Ĭom.$LongTask.onPostExecute(MainActivity.java:1)Īt android.os.AsyncTask.finish(AsyncTask.java:631)Īt android.os.AsyncTask.access$600(AsyncTask.java:177)Īt android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)Īt android.os.Handler.dispatchMessage(Handler.java:99)Īt android.os.Looper.loop(Looper.java:137)Īt (ActivityThread.java:4745)Īt .invokeNative(Native Method)Īt .invoke(Method.java:511)Ĭom.ZygoteInit$n(ZygoteInit.java:786)Īt .ZygoteInit.main(ZygoteInit.java:553)Īt (Native Method) Android Studio don t update Gradle to version 7. ![]() to the app after it is resumed only if the app is in split-screen. Quickly bring your app to life with less code, using a modern declarative approach to UI, and the simplicity of Kotlin. device manufacturer had previously enabled it on the device. This can either be done by device manufacturers or developers. ![]() Explore Modern Android Adopt Compose for teams Get started Start by creating your first app. This exception occurs when the app is trying to notify the user from the background thread (AsyncTask) by opening a Dialog. The treatment also needs to be specifically enabled. Contribute to android/codelab-android-foldable development by creating an account on. Modern Android Quickly bring your app to life with less code, using a modern declarative approach to UI, and the simplicity of Kotlin. Airplane ModeAlways Keep Window on TopBarcode GeneratorBest Window Manager for MacBreak Time. I faced this exception in one of my application and after a long research I found a solution for this problem. How to Download Audio from YouTube: The Ultimate Guide.
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