如何避免链接几个AsyncTask调用？

Question

我必须多次调用Web服务,但每一步都使用上一步中的值,所以现在我有一个巨大的AsyncTasks链:每个AsyncTask都在上一步的AsyncTask的onPostExecute()中执行.这非常非常难看,很难修改.我怎么能避免这个？我想把每一步都放在一个单独的函数中:

int step5() //this function is on the main UI thread
{
   return getStep5ValuesFromWebService() + valuesFromPreviousSteps;
}

int getStep5ValuesFromWebService()
{
   //do work on new thread
   //GetValueFromService(); <-- this is the function that returns an int from the web service, but it has to be called from another thread
}

如何调用GetValueFromService()以便step5()函数返回GetValueFromService()函数中计算的值？

Answer 1

你能不做吗：

private class MyAsync extends AsyncTask<String, Integer, Long> {

    protected Long doInBackground(String... symbols) {
        step1();
        step2();
        step3();
        step4();
        step5();
    }

    private void step1(){}
    private void step2(){}
    private void step3(){}
    private void step4(){}
    private void step5(){}

    protected void onProgressUpdate(Integer... progress) {
    }

    protected void onPostExecute(Long result) {
    }
}