我有两个 ListFragment (A 和 B,实际上是SherlockListFragments
),当我在两个片段中放置断点时onCreateOptionsMenu
,片段 A 被命中 3 次,片段 B 被命中 2 次。此外,我正在为其中一个菜单图标设置动画AsyncTask
,如果我在 Fragment A 中选择一个项目,onCreateOptionsMenu
则会再次调用该图标并且图标加倍:
我不确定为什么onCreateOptionsMenu
会再次调用,因为我只是在“详细信息”片段中调用一个方法:
@Override
public void onListItemClick(final ListView l, final View v, final int position, final long id)
{
DetailsFragment fragment = (DetailsFragment)getFragmentManager().findFragmentById(R.id.fragmentDetails);
if (fragment != null && fragment.isInLayout())
{
fragment.DisplayItems();
}
else
{
final Intent listing = new Intent(activity.getApplicationContext(), DetailsFragmentActivity.class);
startActivity(listing);
}
}
更新:
我正在使用此代码为菜单项设置动画:
private MenuItem refreshItem;
private void DoRefresh()
{
final LayoutInflater inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final ImageView ivRefresh = (ImageView)inflater.inflate(R.layout.refresh_view, null);
final Animation rotation = AnimationUtils.loadAnimation(activity, R.anim.refresh);
ImageView ivRefresh.startAnimation(rotation);
refreshItem.setActionView(ivRefresh);
//AsyncTask is kicked off here
}
@Override
public boolean onOptionsItemSelected(final MenuItem item)
{
if (item.getItemId() == R.id.refresh) {
refreshItem = item;
this.DoRefresh();
return true;
} else {
return super.onOptionsItemSelected(item);
}
}