Why is my DrawerToggle onClick not getting called?

Question

When I am adding a fragment to my activity I am changing the hamburger icon to back arrow image and trying to set onClick to it. But for some reason it is not getting called!

((MyActivity)getActivity()).getmDrawerToggle().setDrawerIndicatorEnabled(false);
((MyActivity)getActivity()).getmDrawerToggle().setToolbarNavigationClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getContext(),"Hello Here",Toast.LENGTH_SHORT).show();
        }
    });