我正在开发Android应用程序，需要到的一个电话AsyncTask的函数多次陆续在一项活动是这样的：

I am developing an android app which needs to call one asynctask function multiple times one after another in one activity something like this:

当我执行这种类型的code的所有任务并行运行约，但我需要这个任务运行此起彼伏。我怎样才能做到这一点无需onPostExecute调用的下一个任务（）

When I'm executing this type of code all tasks are running approximately in parallel, but I need this tasks to run one after another. How can I do this without calling next task in onPostExecute()

推荐答案

一个解决办法是在你的AsyncTask类一样创建一个AsyncTask的对象：

One solution would be to create an AsyncTask object in your AsyncTask class like:

class Task extends AsyncTask {
AsyncTask next;
public void setNext(AsyncTask next){
   this.next=next;
}

//in last line of post execute
   if(next!=null){
       next.execute();
   }
}

现在您的code将是：

now your code would be:

Task t=new Task();
Task t1=new Task();
Task t2=new Task();
t.setNext(t1);
t1.setNext(t2);
t.execute();

第二种方法是创建自己的线程池，如：

2nd way would be to create your own threadpool like:

 class ThreadPool implements Runnable {
    ConcurrentLinkedQueue<AsyncTask> tasks = new ConcurrentLinkedQueue<AsyncTask>();
    Activity activity;

    public ThreadPool(Activity activity) {
        this.activity = activity;
    }

    boolean stop = false;

    public void stop() {
        stop = true;
    }

    public void execute(AsyncTask task) {
        tasks.add(task);
    }

    @Override
    public void run() {
        while (!stop) {
            if (tasks.size() != 0) {

                final AsyncTask task = tasks.remove();
                activity.runOnUiThread(new Runnable() {

                    @Override
                    public void run() {
                        task.execute();
                    }
                });

            }
        }
    }
}

和您的code将是：

ThreadPool pool=new ThreadPool(this);
pool.start();    
.. some code
pool.execute(new task());
.. other code
pool.execute(new task());
.. other code
pool.execute(new task());