Android: How to override onBackPressed() in AlertDialog?

Question

I have an AlertDialog dlgDetails which is shown from another AlertDialog dlgMenu. I would like to be able to show dlgMenu again if the user presses the back button in dlgDetails and simply exit the dialog if he presses outside the dialog.

I think the best way to do this is to override onBackPressed for dlgDetails, but I am not sure how to do that since AlertDialogs must be created indirectly using the Builder.

I am trying to create a derived AlertDialog (public class AlertDialogDetails extends AlertDialog { ...} ) but then I guess I must also extend AlertDialog.Builder in that class to return an AlertDialogDetails, but isn't there a simpler way? And if not, how would you go about overriding the Builder?

Answer 1

I finally added a key listener to my dialog to listen to the Back key. Not as elegant as overriding onBackPressed() but it works. Here is the code:

dlgDetails = new AlertDialog.Builder(this)
    .setOnKeyListener(new DialogInterface.OnKeyListener() {
        @Override
        public boolean onKey (DialogInterface dialog, int keyCode, KeyEvent event) {
            if (keyCode == KeyEvent.KEYCODE_BACK && 
                event.getAction() == KeyEvent.ACTION_UP && 
                !event.isCanceled()) {
                dialog.cancel();
                showDialog(DIALOG_MENU);
                return true;
            }
            return false;
        }
    })
    //(Rest of the .stuff ...)

For answer in Kotlin see here:Not working onbackpressed when setcancelable of alertdialog is false