android - invalidateOptionsMenu 不会从 fragment 中调用

Question

我有一个 fragment 需要构建自己的操作栏:

public class CalendarFragment extends Fragment {

public CalendarFragment() {
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    getActivity().supportInvalidateOptionsMenu();
    setHasOptionsMenu(true);
}

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.calendar_menu1, menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    return super.onOptionsItemSelected(item);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    TextView textView = new TextView(getActivity());
    textView.setGravity(Gravity.CENTER);
    textView.setText("Calendar Fragment");
    return textView;
}

问题是它没有使用 calendar_menu1 中的项目创建新菜单，而只是将其中的项目添加到旧菜单，好像 invalidateOptionsMenu 不起作用(我也试过 getActivity().invalidateOptionsMenu())

Answer 1

你必须调用 onCreate():

setHasOptionsMenu(true);