Android解决嵌套Fragment无法接收onCreateOptionsMenu事件的问题

 @Override
  public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    switch (getSelectedPosition()) {
    case 1:
      inflater.inflate(R.menu.menu1, menu);
      break;
    case 2:
      inflater.inflate(R.menu.menu2, menu);
      break;
    case 0:
    default:
      inflater.inflate(R.menu.menu3, menu);
      break;
    }
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    Fragment fragment = getFragmentByPosition(getSelectedPosition());
    if (fragment != null)
      fragment.onOptionsItemSelected(item);
    return super.onOptionsItemSelected(item);
  }