如何当Android设备屏幕熄灭停止后台线程 [英] How to stop a background thread when the screen in android device goes off

问题描述

我在我的应用程序在后台线程。现在，当屏幕熄灭（后说15秒），线程运行，因此不表现为我preFER。因此，在该活动的生命周期的方法，我必须当屏幕熄灭停止线程。我知道如何停止的线程，但不知道什么时候停止。先谢谢了。

I have a background thread in my app. Now when the screen goes off(after say 15 seconds), the thread is running and hence does not behave as I prefer. So, in which method of the Activity life cycle do I have to stop the thread when the screen goes off. I know how to stop the thread but do not know when to stop it. Thanks in advance.

推荐答案

？如果不是，在onPause。如果是这样，那么你需要一个BroadcastReceiver捕捉到画面关闭，并就停止了这一点。

Do you want it to run when the app is in the background (if the user is in another app)? If not, onPause. If so, then you'd need a BroadcastReceiver to capture the screen turning off, and stop it in respect to that.

IntentFilter screenStateFilter = new IntentFilter();
screenStateFilter.addAction(Intent.ACTION_SCREEN_ON);
screenStateFilter.addAction(Intent.ACTION_SCREEN_OFF);
registerReceiver(mScreenStateReceiver, screenStateFilter);

Java的文件：

Java file :

onReceive(Intent i) {
   if( i.getAction().equals(Intent.ACTION_SCREEN_ON) ) {
        // turn your thread start if you want or anything else
   } else if( i.getAction().equals(Intent.ACTION_SCREEN_OFF) ) {
        // turn your thread cancel here
   }
}

和万一你不知道，一个警告 - 不要用Thread.stop（）以阻止它。它可能导致死机，内存/资源泄漏和死锁。取消线程来代替，而纷纷跟帖民意调查，看看它取消了。

And just in case you don't know, a warning- do not use thread.stop() to stop it. It can cause crashes, memory/resource leaks, and deadlocks. Cancel the thread instead and have the thread poll to see if its canceled.

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