多AsyncTasks的串行执行 [英] Serial Execution of multiple AsyncTasks

问题描述

有谁知道如何轻松地安排多次调用一个AsyncTask的执行在队列或东西，然后以串行方式执行呢？

Does anyone know how to easily arrange multiple calls to an AsyncTask execution in a queue or something and then execute them in a serial fashion?

我要叫异步任务等待完成之前，却是一个看起来我不能做到这一点，即使我测试目前正在执行的之一的地位。

I want the called async task to wait while the one before it is finished, but is seems I can't accomplish this, even if I test the status of the one currently being executed.

任何想法如何解决这个问题？我见过的蜂窝API中有一个方法 executeOnExecutor（）与 SERIAL_EXECUTOR ，我想它实现我所描述的。但是，我不开发蜂窝。

Any ideas how to solve this? I've seen that in the honeycomb API there is a method executeOnExecutor() with a SERIAL_EXECUTOR, I guess it implements what I've described. However, I'm not developing for honeycomb.

谢谢！

推荐答案

您可以尝试IntentService。从参考：

You might try IntentService. From the reference:

IntentService对于那些处理需求的异步请求（pssed的意图EX $ P $）服务的基类。客户端通过startService（意向）发送呼叫请求;根据需要该服务已启动，把手又用一个工作线程的每个意图，并停止时，它本身耗尽的工作。

IntentService is a base class for Services that handle asynchronous requests (expressed as Intents) on demand. Clients send requests through startService(Intent) calls; the service is started as needed, handles each Intent in turn using a worker thread, and stops itself when it runs out of work.

我跑从广播接收器的服务如下：

I ran the service from a broadcast receiver as follows:

    // Now let the service module do the rest

    Intent serviceIntent = new Intent(context, Service.class);
    serviceIntent.putExtra(GC.EXTRA_SERVICE_DATA, serviceData);
    ComponentName compName = context.startService(serviceIntent)

它的工作作为标榜。该请求是序列化的罚款。该服务开始收到一个请求时。处理的最后一个请求后该服务停止。这些请求进行处理FIFO。

It worked as advertised. The requests are serialized fine. The service started when a request was received. The service stopped after the last request processed. The requests were processed FIFO.

我使用的源代码包的名称右击并选择新建/类创建的intentservice。我用intentservice作为超。构造函数有'名'的实际参数的。我把它改为：

I created the intentservice using right click on the source package name and selecting New/Class. I used intentservice as the superclass. The constructor has an arguement of 'name'. I changed it to:

    public XxxService() {super("XxxService");}

所有的code的服务走进onHandleIntent功能。我没有使用任何其他@Override功能。

All of the code for the service went into the onHandleIntent function. I didn't have to use any other @Override functions.

希望这是你想要的......

Hope this is what you wanted...

注：变量语境是的onReceive传递的参数。我在code从XxxxService到服务或服务改变了名字。最后，我创建一个类，在我所有的项目叫GC。这是一个容器类全局常量。 GC.EXTRA_SERVICE_DATA是一个全球性的字符串定义额外的按键。

Notes: The variable 'context' is a passed parameter in onReceive. I changed the names in the code from XxxxService to 'Service' or 'service'. Finally, I create a class in all my projects called GC. It is a container class for global constants. GC.EXTRA_SERVICE_DATA is a global String defining the extra key.

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