Why FragmentManager's getBackStackEntryCount() return zero?

Question

private static void changeFragment(Fragment f, boolean init) {
        FragmentTransaction ft = fm.beginTransaction();
        ft.replace(R.id.info_content, f,f.getC         


        

Answer 1

Another solution is using FragmentManager.OnBackStackChangedListener

fm.addOnBackStackChangedListener(new FragmentManager.OnBackStackChangedListener() {
        @Override
        public void onBackStackChanged() {
            Log.d("test", "backStackEntryCount: " + fm.getBackStackEntryCount());
        }
});