关于invalidateOptionsMenu的一个疑问

Question

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menu_item_clear:
                QueryPreferences.setStoredQuery(getActivity(), null);
                updateItems();
                return true;
            case R.id.menu_item_toggle_polling:
                boolean shouldStartAlarm = !PollService.isServiceAlarmOn(getActivity());
                PollService.setServiceAlarm(getActivity(), shouldStartAlarm);
                getActivity().invalidateOptionsMenu();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
这是《android编程权威指南》里的一段代码，我调试时发现第二个分支运行到getActivity().invalidateOptionsMenu();后不执行return true；而是走下面的default，感觉很困惑

Answer 1

你要brack吧，应该就没问题了