An error occurs:

android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@19fb3f3e is not valid; is your activity running? at android.view.ViewRootImpl.setView(ViewRootImpl.java:562) at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:282) at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85) at android.app.Dialog.show(Dialog.java:298) at android.app.Activity.showDialog(Activity.java:3422) at android.app.Activity.showDialog(Activity.java:3371) at com.brokeyourapp.app123.StepGallery6$1.handleMessage(StepGallery6.java:481) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5294) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)

I understand it occurs when you try to create a dialogue when the activity does not exist. And I suspect that the reason is exactly how I call this dialogue.

In the onCreate method onCreate there is a Handler, which in a particular case shows a dialog, like this showDialog(IDD_CONGRADS);

 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.stepgallery6); h = new Handler(Looper.getMainLooper()) { public void handleMessage(android.os.Message msg) { // обновляем Кнопки switch (msg.what) { case 40: if (Arrays.equals(compArray, compButtonArray)) { // runOnUiThread(new Runnable() { @Override public void run() { showDialog(IDD_CONGRADS); } }); } else { runOnUiThread(new Runnable() { @Override public void run() { showDialog(IDD_NOCONGRADS); } }); } break; case 60: GoAct(1); break; { }

The effect on Handler is like this:

 @Override public void onStart() { super.onStart(); Thread t = new Thread(new Runnable() { @Override public void run() { for (int i = 1; i <= 40; i++) { try { TimeUnit.SECONDS.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); } h.sendEmptyMessage(i); }} }); t.start(); }

And the function on call looks like this:

 // Вызывает диалог по окончанию @Override protected Dialog onCreateDialog(int id) { switch (id) { case IDD_CONGRADS: //AlertDialog.Builder builder = new AlertDialog.Builder(this); AlertDialog.Builder builder = new AlertDialog.Builder(StepGallery6.this); builder.setMessage(R.string.congrats1) .setCancelable(false) .setPositiveButton(R.string.next, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { GoAct(2); } }) .setNeutralButton(R.string.back_to_menu, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { GoAct(1); } }); return builder.create(); case IDD_NOCONGRADS: AlertDialog.Builder builder2 = new AlertDialog.Builder(StepGallery6.this); builder2.setMessage(R.string.nocongrats) .setCancelable(false) .setPositiveButton(R.string.again, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { GoAct(3); } }) .setNeutralButton(R.string.back_to_menu, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { GoAct(1); } }); return builder2.create(); default: return null; } }

And it seems to me that it is all the salt in it. Some detail is missing. Please tell those who came across.

  • one
    Try wrapping showDialog () into runOnUiThread(new Runnable() { @Override public void run() { showDialog(IDD_CONGRADS); } }); - Yuriy SPb ♦
  • @Yuriy SPb does not help. In general, a mistake arises spontaneously, they are not there initially, and it may not be long, and then suddenly. - St. Ivan
  • @Yuriy SPb maybe I need some additional information, more logs? Tell me. - St. Ivan
  • one
    The only thing that comes to my mind is an attempt to display a dialogue on the onPause field ... Try to make a flag in activation, which will be true in onResume and false in onPause. And when you start the dialogue, check it. If it is false - do not display the dialog - YuriySPb ♦
  • one
    I also did not understand what you want to say. Add code to the question. And I had in mind adding a boolean variable to the activation, which should be assigned values ​​in the specified methods and check this value before opening the dialog. Not the fact that it will help - YuriySPb ♦

2 answers 2

Perhaps the error is that the attempt to display the dialog does not occur between the onResume and onPause calls. Make sure the dialog does not start after onPause or before onResume.

    Perhaps the Handler is created in the wrong stream. Try to request the main trade when creating.

     Handler handler = new Handler(Looper.getMainLooper());
    • Requesting what you said also does not help :( - St. Ivan