Prevent back button from closing a dialog box

Question

I am trying to prevent an AlertDialog box from closing when pressing the back button in Android. I have followed both of the popular methods in this thread, and with System.out.

Answer 1

To prevent the back button closes a Dialog (without depending on Activity), just the following code:

alertDialog.setOnKeyListener(new DialogInterface.OnKeyListener() {
    @Override
    public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
        // Prevent dialog close on back press button
        return keyCode == KeyEvent.KEYCODE_BACK;
    }
});