Android Back Button and Progress Dialog

Question

I have an AsyncTask that shows a progressDialog whilst working (it calls runOnUiThread from within doInBackground to show the progress dialog).

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Answer 1

I just found a perfect and simplest solution to this problem. There's a method in ProgressDialog to set KeyListener.

progressDialog.setOnKeyListener(new OnKeyListener() {
    @Override
    public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
        if(keyCode==KeyEvent.KEYCODE_BACK && !event.isCanceled()) {
            if(progressDialog.isShowing()) {
                //your logic here for back button pressed event
            } 
            return true;
        }
        return false;
    }
});

It's working fine with setCancelable(false). I am also checking for event.isCanceled(), because without that I was getting two events. I've tested this on Lollipop device with and without Hardware keys.