onCreateOptionsMenu() 在 Fragment 中不起作用

Question

I am trying to implement a search Filter in my Fragment, but it does not let me. I used the same code in Activity before and it worked. Whenever I type something, the onCreateOptionsMenu() does not get called. The App looks like this : [![app Picture][1]][1] As you can see I type something in the top and it won't get filtered.

My Fragment code: `

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

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View RootView = inflater.inflate(R.layout.fragment_tab1, container, false);
    if(getArguments() != null){
        String yourText = getArguments().getString("interessen");
        System.out.println(yourText);
    }`

. . .

 @Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    super.onCreateOptionsMenu(menu, inflater);

    inflater.inflate(R.menu.menuevents, menu);
    super.onCreateOptionsMenu(menu, inflater);
    MenuItem searchitem = menu.findItem(R.id.searchEvent);
    //searchitem.setVisible(false);
    final SearchView searchView = (SearchView) searchitem.getActionView();
    final List<Event> allEvents = new ArrayList<>();
    allEvents.addAll(eventList);

    searchitem.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {
        @Override
        public boolean onMenuItemActionExpand(MenuItem item) {
            eventList.clear();
            eventList.addAll(allEvents);
            return true;
        }

        @Override
        public boolean onMenuItemActionCollapse(MenuItem item) {

            eventList.clear();
            eventList.addAll(allEvents);
            return true;
        }
    });
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
            eventListAdapter.getFilter().filter(newText);
            return false;
        }

    });

I did not copy the EventListAdapter in, becuase this should work just fine. Its just that the Fragment does not get Access to the SearchItem.

Anybody? :) [1]: https://i.stack.imgur.com/JkLcL.png

Answer 1

You've called setMenuVisibility() , which means your Fragment is specifically opting out of having its menu being shown. It is expected that when your menu isn't shown, onCreateOptionsMenu() is not triggered.

Remove that line of code to have your menu actually be visible.