我正在尝试显示从网址中提取的项目列表,但我只想一次获取其中的20个…所以我已经实现了一个OnScrollListener来获取用户在最后一项上的项目列表显示.
提取的项目,但我唯一的问题是列表视图没有更新：这是我的代码到目前为止：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
parentView = inflater.inflate(R.layout.activity_event_speakers_alphabetically, container,false);
listView = (ListView) parentView
.findViewById(R.id.speakersAlphabeticallyActivityList);
nameOrderedMembers.addDataBatch(communityMembers);
nameOrderedAdapter = DelegateViewStateAdapterFactory
.makeUserListAdapter(getActivity(),
nameOrderedMembers.getSortedData(), DelegateViewStateAdapterFactory.OrderType.NAME);
listView.setAdapter(nameOrderedAdapter);
AQuery aQuery = new AQuery(listView);
aQuery.id(R.id.speakersAlphabeticallyActivityList).scrolled(new EndlessScrollListener());
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView> arg0, View arg1, int arg2,
long arg3) {
if (nameOrderedAdapter.getItem(arg2) instanceof User) {
User u = (User) nameOrderedAdapter.getItem(arg2);
Intent i = new Intent(getActivity(),
UserProfileFragmentActivity.class);
startActivity(i);
}
}
});
return parentView;
}
现在 – 在onPostExecute方法的AsynkTask中 – 我像这样通知适配器：
communityMembers.addAll(newMembers);
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
nameOrderedAdapter.addAll(communityMembers);
nameOrderedAdapter.notifyDataSetChanged();
}
});
但是列表视图不会刷新 – 只有当我返回并重新打开活动时 – 才会显示新数据.
那么如何通知适配器有新数据要显示？