How to fix android.view.WindowManager$BadTokenException: Unable to add window -- token null

STORY:
If your app crash with this error:

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


.. while while it tries to display dialog ,then it mean you provide wrong context
                     
SOLUTION

replace:

AlertDialog.Builder alertBox = new AlertDialog.Builder(getApplicationContext());


with

AlertDialog.Builder alertBox = new AlertDialog.Builder(AppLauncher.this);