public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
 
            Log.d("Focus debug", "Focus changed !");
 
    if(!hasFocus) {
        Log.d("Focus debug", "Lost focus !");
 
        Intent closeDialog = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
        sendBroadcast(closeDialog);
    }
}