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屏幕超时打乱了文字转语音应用程序

[英]Screen timeout disrupts text-to-speech app

原文 2011-04-01 00:14:49 3 1 android/ timeout

I have a simple text-to-speech app that gets disrupted when screen timeout kicks in. 我有一个简单的“文字转语音”应用，当屏幕超时开始时，该应用就会中断。

I already know about the FLAG_KEEP_SCREEN_ON solution, which keeps the screen on while the app's window is in the foreground. 我已经知道FLAG_KEEP_SCREEN_ON解决方案，当应用程序的窗口处于前台时，该解决方案可使屏幕保持打开状态。

My question is whether it is possible to keep the text-to-speech running even after screen timeout kicks in. 我的问题是，即使在屏幕超时开始后，是否也可以保持文本到语音的运行。

Is this possible at all or does this fundamentally go against the design of Android? 这是可能的吗，还是从根本上与Android的设计背道而驰？

For example, if I re-implement my app as a service, can it continue running while the screen is off? 例如，如果我将我的应用重新实现为服务，它可以在屏幕关闭时继续运行吗？

1 个解决方案

Yes, I would recommend that you run the text-to-speech converter in a background Service. 是的，我建议您在后台服务中运行文本到语音转换器。 But even that is not enough. 但是，这还不够。 What you need to do is maintain a wakelock. 您需要做的是保持唤醒锁。 This will keep the device from going to sleep and turning off your converter. 这样可以防止设备进入睡眠状态并关闭转换器。 There are different kinds of wakelocks. 有不同种类的唤醒锁。 What you probably need is a PARTIAL_WAKE_LOCK. 您可能需要的是PARTIAL_WAKE_LOCK。 It is described here: 此处描述：

Android PowerManager Android PowerManager

Mark Murphy's Advanced Android book goes into detail on how to create a Service and maintain the proper wakelocks. 马克·墨菲（Mark Murphy）的《高级Android》一书详细介绍了如何创建服务和维护适当的唤醒锁。 He includes source code (on github) showing how to do this. 他包括显示如何执行此操作的源代码（在github上）。 His book is here: 他的书在这里：

The Busy Coder's Guide to Advanced Android Development 忙于高级Android开发的编码人员指南