从asynctask更新CursorAdapter

Question

我在通知CursorAdapter数据已更改时遇到问题。

    public class MyListFragment extends ListFragment implements LoaderCallbacks<Cursor> {

    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
            return new MyListCursorLoader(getActivity());
        }


        public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
            MyCursorAdapter adapter = new MyCursorAdapter(getActivity(),(MyCursor)cursor);
            setListAdapter(adapter);
        }

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getLoaderManager().initLoader(0, null, this);
    }

    private static class MyCursorAdapter extends CursorAdapter {

    ... some code ...

    }

    private static class MyListCursorLoader extends SQLiteCursorLoader {

    ... code ...

    }

SQLite数据库用AsyncTask更新（有公共接口，ListFragment用listener实现），我尝试用onPostExecute刷新ListAdapter，但我真的不知道如何刷新。

public class MyDownloader extends AsyncTask<Void, Void, Void> {

    public interface OnMyDownloaded {
        void onMyDownloaded();
    }


    public JSONDownloader(Context context, OnMyDownloaded listener) {

            ...code...

    }

    protected Void doInBackground(Void... params) {
            ...code...
    }


    protected void onPostExecute(Void result) {
        listener.onMyDownloaded();
    }

private class OnEventDownloaded implements OnJSONDownloaded {
    ?????
}

Answer 1

您可以调用getLoaderManager().restartLoader（int id,Bundle args,loaderCallbacks callback)； 它将调用onCreateLoader，因此将重新创建loader。如果我没理解错的话。