android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application

Hi guys,

if you are facing this problem then it is problem with your context which you are passing in the AlertDialog, so make sure you are passing the Context which is initialized by

Context context = this;

And some times in case of Service, you can face this problem while you are using the correct Context. In that case use the following code before show() method.

AlertDialog ad;
// code for creating. .create();
ad.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG);
ad.show();

It will work.