Handle back press on top fragment

Question

I have two fragments [A] and [B].

In fragment [A] , I want to ignore back press so I have the following code

View view = inflater.inflate(R.layout.fragment_confirmation, container, false);

    view.setOnKeyListener(new View.OnKeyListener() {

        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {

            if (keyCode == KeyEvent.KEYCODE_BACK) {
                return true;
            }

            return false;
        }
    });

This works fine on fragment [A]. When i add fragment [B] to backstack, seems fragment [B] cannot handle back press although, the logic to ignore back press was only in fragment[A] . Can anyone explain this strange behaviour?

Answer 1

try this may be it works.Override the back key in onResume ...

@Override
public void onResume() {

    super.onResume();

    getView().setFocusableInTouchMode(true);
    getView().requestFocus();
    getView().setOnKeyListener(new View.OnKeyListener() {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {

            if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK){

                // handle back button    
                return true;
                }

            return false;
        }
    });
}