在OnLoadFinished中调用swapCursor时出现长时间延迟

Question

我正在实现一个ListView，它包含一个带有LoaderCallbacks的Customized CursorAdpater。当调用OnCreatLoader时，我正在运行AsyncTaskLoader，它从数据库中获取theCursor。我注意到在加载游标后调用swapCursor时会有延迟。有没有解决方案，比如一次加载10个项目？如果是这样，我在哪里可以做到这一点？

    @Override
public Loader<Cursor> onCreateLoader(int id, Bundle args)
{
    // Create the Cursor that will take care of the data being displayed
    Log.d("TAG", "onCreateLoader...");
    return new MessageAsyncTaskLoader(getActivity());

}


    @Override
public void onLoadFinished(Loader<Cursor> arg0, Cursor cursor)
{
    // Now Bind the data to the View
    Log.d("TAG", "onLoadFinished...ARG1= " + cursor);
    mCusrorAdapter.swapCursor(cursor);// This is were the delay is...
}

    public static class MessageAsyncTaskLoader extends AsyncTaskLoader<Cursor>
{
    Cursor cursor;
public MessageAsyncTaskLoader(Context context)
{
    super(context); 
}

@Override
    protected void onStartLoading()
    {
        super.onStartLoading();
        mCusrorAdapter = new CustomCursorAdapter(mContext);
        mListView.setAdapter(mCusrorAdapter);
        forceLoad();
    }

@Override
public Cursor loadInBackground()
{
     cursor = mContext.getContentResolver().query(CONTENT_URI, null, null,null,
            DataBase.COLUMN_MESSAGE_DATE+ " DESC");
    return cursor;
}

@Override
    protected void onStopLoading()
    {
        super.onStopLoading();
        cursor.close();
    }

}