从AsyncTask更新UI挂起​​SwipeRefreshLayout加载圈

Question

我创建了一个通用的AsyncTask。它在后台工作正常但是当我在doInBackground回调此任务时更新UI时，它只是多次挂起SwipeRefreshLayout的加载圈。我需要这个加载才能顺利运行。 我正在使用AsyncTask如下

public class backgroundWorker extends AsyncTask<Object, Void, Object>{//params, progress, result
    backgroundWorkerCallback callback;
    public backgroundWorker(backgroundWorkerCallback _callback)    {
        this.callback = _callback;
    }
    @Override
    protected void onPostExecute(Object result) {
        super.onPostExecute(result);
        callback.onPostExecute(result);
    }
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }
    @Override
    protected Object doInBackground(Object... param)
    {
        return callback.doInBackground(param);
    }
}

backgroundWorkerCallback是一个界面

public interface backgroundWorkerCallback {

    public Object doInBackground(Object param);
    public void onPostExecute(Object result);
}

我正在以这种方式使用这个AsyncTask

srlStockReport.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
    @Override
    public void onRefresh() {
        backgroundWorker bw = new backgroundWorker(new backgroundWorkerCallback(){
            @Override
            public Object doInBackground(Object param)
            {
                //fetch data from server
                //put some data in in Preference
                //Load a RecyclerView from list

                return null;
            }
            @Override
            public void onPostExecute(Object result)
            {

            }
        });
        bw.execute();
    }
});