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AsyncTask中的httpClient是否需要wakeLock？

[英]Does httpClient in AsyncTask need wakeLock?

原文 2012-12-26 19:00:06 2 1 android/ android-asynctask

I am executing httpClient in AsyncTask but before this another AsyncTask is used to generate some data, which can take long time. 我在AsyncTask中执行httpClient但在此之前另一个AsyncTask用于生成一些数据，这可能需要很长时间。 If device gets sleep before executing httpClient, what would happen? 如果设备在执行httpClient之前进入睡眠状态，会发生什么？ Do I need wakeLock for httpClient requests? 我是否需要wakeLock来获取httpClient请求？

1 个解决方案

If the device go sleep, your activity onPause() is called. 如果设备进入休眠状态，则会调用onPause()活动。 If you don't cancel/terminate the background task in some fancy way, nothing happens to it. 如果您没有以某种奇特的方式取消/终止后台任务，则没有任何反应。 AsyncTask are run in a separate thread than the main application one, so nothing can stop them. AsyncTask在一个独立的线程中运行，而不是主应用程序，所以没有什么可以阻止它们。 Ever. 永远。

I didn't understand your design: what's the purpose of two separate AsyncTask s? 我不明白你的设计：两个独立的AsyncTask的目的是什么？ If gathering data to fill the HTTP request consumes time, you should use a single AsyncTask and do everything inside doInBackground() , to ensure no race condition happens. 如果收集数据以填充HTTP请求会消耗时间，则应使用单个AsyncTask并执行doInBackground()内的所有doInBackground() ，以确保不会发生竞争条件。 Otherwise you'd have to chain tasks, or fire the second one in the first one, and this doesn't sound right. 否则你必须链接任务，或者在第一个任务中触发第二个任务，这听起来不对。