在Android Studio中显示和隐藏带有碎片的工具栏中的菜单图标

public class MyFragment extends Fragment {
    
    // ...

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

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menu_item1:
                // 执行菜单项1的操作
                return true;
            case R.id.menu_item2:
                // 执行菜单项2的操作
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
    
    // ...
}