Android - fragment 中的 ListView

Question

我正在尝试解析 RSS 提要并通过 fragment 中的 Listview 将其显示给用户。问题是列表中没有显示任何内容，我收到了一些错误:

V/Error Parsing Data: java.io.IOException: Couldn't open http://feeds.bbci.co.uk/news/england/rss.xml
W/FragmentManager: moveToState: Fragment state for Thingy{3633e4e #1 id=0x7f0c0069} not updated inline; expected state 3 found 2

我的 fragment 类:

public class Thingy extends Fragment {
    ListView mList;
    ArrayAdapter<String> adapter;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View v = inflater.inflate(R.layout.fragment_main, container, false);
        adapter = new ArrayAdapter<>(getActivity(), R.layout.basic_list_item);
        mList = ((ListView) v.findViewById(R.id.listView));
        new GetRssFeed().execute("http://feeds.bbci.co.uk/news/england/rss.xml");

        return v;
    }

    private class GetRssFeed extends AsyncTask<String, Void, Void> {
        @Override
        protected Void doInBackground(String... params) {
            adapter.add("Pizza Steak");
            try {
                RssReader rssReader = new RssReader(params[0]);
                for (RssItem item : rssReader.getItems()) {
                    adapter.add(item.getTitle());
                }
            } catch (Exception e) {
                Log.v("Error Parsing Data", e + "");
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            super.onPostExecute(aVoid);
            adapter.notifyDataSetChanged();
            mList.setAdapter(adapter);
        }
    }
}

Answer 1

请在 list 上添加权限

<manifest xlmns:android...>
...
<uses-permission android:name="android.permission.INTERNET" />
<application ...
</manifest>