问题描述
在基于 CE 的 Windows Mobile 中，您可以使用 SetPowerRequirement 和 ReleasePowerRequirement API 是这样的:
In the CE based Windows Mobile you could prevent the screen back-light from timing out using the SetPowerRequirement and ReleasePowerRequirement API's like so:
IntPtr handle = SetPowerRequirement("BKL1:", PowerState.FULL, 1, IntPtr.Zero, 0);
// screen won't timeout while you do stuff in here
ReleasePowerREquirement(handle);
WP7 上是否有类似的功能?
Is a similar thing possible on WP7?
推荐答案
是的，这是可能的.您可以使用 PhoneApplicationService.Current.UserIdleDetectionMode 来停止屏幕背光超时并停止屏幕锁定.
Yes, it is possible. You can use PhoneApplicationService.Current.UserIdleDetectionMode to stop the screen backlight timing out and stop the screen from locking.
您还可以使用 PhoneApplicationService.Current.ApplicationIdleDetectionMode 来允许应用程序在锁定屏幕下继续运行.
You can also use PhoneApplicationService.Current.ApplicationIdleDetectionMode to allow the application to keep running under a lock screen.
以下是关于这两个选项的更多详细信息:
Here's some more detail on those two options:
禁用此功能将阻止屏幕超时和锁定.例如，我在下载大文件时禁用 UserIdleDetectionMode，因此应用不会中途终止下载.
Disabling this will stop the screen from timing out and locking. As an example, I disable UserIdleDetectionMode while downloading a large file, so the app doesn't kill the download half-way.
下载完成后，我重新启用 UserIdleDetectionMode，以便屏幕可以像往常一样超时.
When the download is completed, I re-enable UserIdleDetectionMode so the screen can timeout as usual.
注意:这是一次成功.您可以禁用它，但不能重新启用它.
NB: This is a one-time hit. You can disable it, but you cannot re-enable it.
如果您禁用 ApplicationIdleDetectionMode，您的应用将在屏幕锁定时继续运行.如果用户启动不同的应用程序，您的应用程序仍然会死.
If you disable ApplicationIdleDetectionMode, your app will continue to run when the screen locks. Your app will still die if the user starts a different app.
认证要求要求您在第一次禁用 ApplicationIdleDetectionMode 时提示用户.例如.此应用程序将继续在锁定屏幕下运行，并且可能会耗尽您的电池电量.您同意吗?"否则，您的应用将被拒绝.
The certification requirements ask that you prompt the user the first time you disable ApplicationIdleDetectionMode. E.g. "This app will continue to run under a locked screen, and may drain your battery. Are you ok with that?" If you don't your app will be rejected.
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