检测硬件音量按钮点击当屏幕关闭 [英] Detect Hardware Volume Button Clicks When Screen Is Off

问题描述

我已经写了Andoid应用程序，使用硬件音量按钮用于其他用途。

I've written an Andoid app that uses the hardware Volume buttons for another purpose.

它工作正常，如果应用程序正在运行，可见，但是当我关闭屏幕或让它超时，按钮的点击不进入我的处理程序。

It works fine if the app is running and visible, but when I turn the screen off or let it time out, the button clicks don't get into my handlers.

有谁知道是否有一种方法来检测这些按钮的点击，当屏幕处于关闭状态？

Does anyone know if there is a way to detect these button clicks when the screen is off?

推荐答案

要保持检测这样的事情，当屏幕处于关闭状态的唯一方法是获得一个WakeLock，使屏幕关掉了，还是让你的应用程序功能。然而，这水渠电池寿命相当多，应该只使用在绝对必要的。

The only way to keep detecting things like this when the screen is off is to acquire a WakeLock that will allow the screen to turn off, and still let your app function. However, this drains the battery life quite a bit, and should only be used when absolutely necessary.

在这种情况下，您将需要一个 PARTIAL_WAKE_LOCK 。

In this case, you will need a PARTIAL_WAKE_LOCK.

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