仅在显示片段时显示导航抽屉菜单项

Question

I am trying to show a button in the actionbar when a Fragment is shown and to hide the button when the other Fragment are shown.

I Override the onCreateOptionsMenu method:

@Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.main, menu);
        MenuItem item= menu.findItem(R.id.action_example);

         item.setVisible(true);

        super.onCreateOptionsMenu(menu,inflater);
    }

And use setHasOptionMenu(true) :

@Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setHasOptionsMenu(true);
        }

I have done a test and I noticed that initially the button doesn't appear in the other Fragment , but after I open the Fragment in which I put this code above, the button is shown also in the other Fragment.

Answer 1

What you are missing is removing the optionsMenu in the onDestroy of the fragment. The behaviour you describe is logical with your code: when the Fragment is created you also create the options menu. It will not automatically be destroyed when the Fragment is destroyed.