OnBackPressedCallback not called - Activitiy is terminated immediately

Hello,

adding OnBackPressedDispatcher and OnBackPressedCallback in my MainActivity cause onBackPressedwas deprecated.

old usage:

   @Override
public void onBackPressed() {
    //Display alert message when back button has been pressed
    alertDialogShow();
}

New usage: put it in my initialize listener call in MainActivity onCreate() - initListeners()

    onBackPressedCallback = new OnBackPressedCallback(true) {
        @Override
        public void handleOnBackPressed() {
            //Display alert message when back button has been pressed
            alertDialogShow();
        }
    };

    onBackPressedDispatcher = new OnBackPressedDispatcher();
    onBackPressedDispatcher.addCallback(this,onBackPressedCallback);

but the method alterDialogShow() is never called and the activity is terminated immediately. How can I solve this.

Thanks, Alejandro

You create a new OnBackPressedDispatcher but you must use the Activity's OnBackPressedDispatcher and add your callback to it:

//onBackPressedDispatcher = new OnBackPressedDispatcher();
onBackPressedDispatcher = getOnBackPressedDispatcher();

onBackPressedDispatcher.addCallback(this, onBackPressedCallback);