我可以防止 Windows Phone 7 上的屏幕超时吗？
在基于 CE 的 Windows Mobile 中，您可以使用 防止屏幕背光超时SetPowerRequirement 和 ReleasePowerRequirement API 如下：
IntPtr handle = SetPowerRequirement("BKL1:", PowerState.FULL, 1, IntPtr.Zero, 0);
// screen won't timeout while you do stuff in here
ReleasePowerREquirement(handle);
是类似的东西WP7上可以吗？
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);
Is a similar thing possible on WP7?
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是的，这是可能的。您可以使用
PhoneApplicationService.Current.UserIdleDetectionMode来阻止屏幕背光超时并阻止屏幕锁定。您还可以使用
PhoneApplicationService.Current.ApplicationIdleDetectionMode允许应用程序在锁定屏幕下继续运行。以下是有关这两个选项的更多详细信息：
UserIdleDetectionMode
禁用此选项将阻止屏幕超时和锁定。例如，我在下载大文件时禁用 UserIdleDetectionMode，因此应用程序不会中途终止下载。
下载完成后，我重新启用 UserIdleDetectionMode，以便屏幕可以像平常一样超时。
ApplicationIdleDetectionMode
注意：这是一次性的。您可以禁用它，但无法重新启用它。
如果您禁用ApplicationIdleDetectionMode，您的应用程序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掉。
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。您同意吗？”如果您不这样做，您的应用程序将被拒绝。
Yes, it is possible. You can use
PhoneApplicationService.Current.UserIdleDetectionModeto stop the screen backlight timing out and stop the screen from locking.You can also use
PhoneApplicationService.Current.ApplicationIdleDetectionModeto allow the application to keep running under a lock screen.Here's some more detail on those two options:
UserIdleDetectionMode
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.
When the download is completed, I re-enable UserIdleDetectionMode so the screen can timeout as usual.
ApplicationIdleDetectionMode
NB: This is a one-time hit. You can disable it, but you cannot re-enable it.
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.
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.