保持清醒的屏幕在我的活动 [英] Keep the screen awake throughout my activity

问题描述

我在我的应用程序三项活动。我想保持屏幕清醒的时候是在第二个活动。屏幕不应该在我的第二个活动熄灭，除非锁键手动pssed $ P $。我经历了很多联系，但他们似乎我不清楚。

I have three activities in my app. I want to keep the screen awake when it is in the second activity. The screen should not go off in my second activity unless the "lock" key is pressed manually. I went through many links but they seem unclear to me.

推荐答案

如上所述，在Android教程保持屏幕在，你可以在几个方面做到这一点。您可以在活动的窗口中设置FLAG_KEEP_SCREEN_ON：

As discussed in the Android tutorial Keep the Screen On, you can do this in a few ways. You can set the FLAG_KEEP_SCREEN_ON on the activity's window:

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

这是XML等价物即是属性机器人添加：keepScreenOn =真正的来您的活动布局的根视图。编程设置标志的好处是，你可以使用

An XML equivalent for that is to add the attribute android:keepScreenOn="true" to the root view of your activity's layout. The advantage of setting the flag programmatically is that you can use

getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

当你不再需要强制在屏幕上停留，而你的活动正在运行。

when you no longer need to force the screen to stay on while your activity is running.

的另一种方法，以控制在屏幕上（和某些其它资源）是使用一个唤醒锁：

Another way to control the screen (and certain other resources) is to use a wake lock:

mWakeLock = getContext().getSystemService(Context.POWER_SERVICE)
    .newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, getClass().getName());
mWakeLock.acquire();
// screen stays on in this section
mWakeLock.release();

该清单必须包括此权限：

The manifest will have to include this permission:

<uses-permission android:name="android.permission.WAKE_LOCK"/>

然而，如在本教程所讨论的，一个唤醒锁是更适合于其他的用例（例如服务或后台任务需要在CPU保持运行而屏幕是关闭的）。

However, as discussed in the tutorial, a wake lock is more appropriate for other use cases (such as a service or background task needing the CPU to keep running while the screen is off).

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