Android 如何在屏幕关闭时保持活动运行？
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原文地址: http://stackoverflow.com/questions/11978742/
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How to keep an Activity running while screen off?
提问by babysnow
How to keep an Activity running/active when the screen shuts off?
屏幕关闭时如何保持活动运行/活动？
回答by Anirudh Ramanathan
You will need to use a PARTIAL_WAKE_LOCKto ensure that your activity is kept active. android.permission.WAKE_LOCKmust be requested in your manifest. However, battery will drain faster, so do remember to releasethe wakelock as soon as possible.
您需要使用PARTIAL_WAKE_LOCK来确保您的活动保持活跃。android.permission.WAKE_LOCK必须在您的清单中请求。但是，电池会消耗得更快，因此请记住尽快释放唤醒锁。
Alternately, use a Serviceinstead
或者，使用服务代替
回答by Tom-Oliver Heidel
There is also a good way. I found this some months ago and it save a little bit the battery life ;)
还有一个好办法。几个月前我发现了这个，它可以节省一点电池寿命；）
http://thinkandroid.wordpress.com/2010/01/24/handling-screen-off-and-screen-on-intents/
http://thinkandroid.wordpress.com/2010/01/24/handling-screen-off-and-screen-on-intents/
回答by Engin Yapici
Be sure you don't have ' android:noHistory="true" ' in your manifest file for any of the activities. It kills the activity when the app goes off the screen or screen shuts off.
确保您的清单文件中没有任何活动的“ android:noHistory="true" ”。当应用程序关闭屏幕或屏幕关闭时，它会终止活动。
If you want your app stay active even if the screen is off I don't think you need to do anything extra: My application doesn't have any extra code for it and when I turn the screen off and on it is still there. But! Android OS probably kills it after a while when the screen is off, so you should probably use WAKE_LOCK in your manifest file. Or you can add ' android:keepScreenOn="true" ' to the manifest file to keep the screen ON all the time when your app is running.
如果您希望您的应用程序在屏幕关闭时保持活动状态，我认为您不需要做任何额外的事情：我的应用程序没有任何额外的代码，当我关闭和打开屏幕时它仍然存在。但！当屏幕关闭一段时间后，Android 操作系统可能会杀死它，因此您可能应该在清单文件中使用 WAKE_LOCK。或者，您可以将“ android:keepScreenOn="true" ”添加到清单文件中，以在您的应用程序运行时始终保持屏幕开启。
