Android - 激活系统键锁（又名锁屏）
我必须激活 Android 的系统按键锁（按下关机/挂断按钮时得到的按键锁）。 请参阅此处：
我已经浏览过文档，但我发现的所有内容都是 PowerManager 和 KeyguardManager。 两者似乎都不是解决方案:-(。
那么，每个人都知道如何从 Android 应用程序实现这一点吗？（如果需要特殊权限，那没问题，但更改设备的设置不是解决方案......）
<强>编辑：或者有人知道这绝对不可能吗？顺便说一句，带有发送密钥的解决方案不再起作用（请参阅评论）。
I have to activate android's system key lock (the one you get when you press the power off/hang up button). See here:
I already browsed the docs but everything I found was PowerManager and KeyguardManager. Both seem not to be the solution :-(.
So, does everyone know how to achieve that from a android application? (If special permissions are required, that is no problem but changing the device's settings is not a solution...)
EDIT: Or does someone know that this is definitely not possible at all? Btw. craigs solution with sending keys does not work anymore (see comments).
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一段时间以来，我一直在寻找完全相同问题的答案。 显然，从 2.0 开始，应用程序级别的设备管理器权限已被删除。 但在 Froyo - 2.2 中，设备策略管理器为我们的开发人员提供了多种管理级别的控制。
http://developer.android.com/guide/topics/admin/device -admin.html
I have been searching for an answer to the exact same question for a while. Apparently, after 2.0 onwards the device manager privileges for the app level were removed. But with Froyo - 2.2 the device policy manager is revealed granting us developers a multitude of administrative level controls.
http://developer.android.com/guide/topics/admin/device-admin.html
您正在寻找的是 reenableKeyguard KeyguardManager.KeyguardLock 中的 () 方法我的朋友！
What you're looking for is the reenableKeyguard() method in KeyguardManager.KeyguardLock my friend !
看起来屏幕锁定功能是使用
PowerManager.java中的method:方法来执行的。 可以通过这种方式获得对它的引用：但是，这需要权限
，该权限是仅系统可用的 2 级权限。
所以看起来这是不可行的。 这仅适用于1.1版本，我不知道1.5版本。
Looks like the screen lock function is performed using the method:
method in
PowerManager.java. It's possible to get a reference to it in this fashion:However this requires the permission
which is a level 2 permission available to the system only.
So looks like this isn't doable. This is for version 1.1 only, I don't know for 1.5.
这里有一个很好的例子：
http://www.anddev.org/ throwing-simulate_keyrinkles_programatically -t717.html
看起来您可以通过编程方式将任何击键发送到系统。 听起来您正在寻找的密钥代码是 KEYCODE_ENDCALL，但如果这不起作用，这里还有很多其他代码可以尝试：
http://developer.android.com/reference/android/view/KeyEvent.html
我不知道是否有任何API调用导致锁定发生，但这似乎是一个非常可靠的解决方法，直到您找到更好的解决方案。
There's a pretty good example here:
http://www.anddev.org/throwing-simulating_keystrokes_programatically-t717.html
It looks like you can programmatically cause any keystroke to be sent to the system. It sounds like the keycode you're looking for is the KEYCODE_ENDCALL, but if that doesn't work there are plenty of other codes to try here:
http://developer.android.com/reference/android/view/KeyEvent.html
I don't know if there's any API call to cause the lock to occur, but this seems like a pretty sturdy workaround until you find a better solution.
深入研究 Android 源代码发现 WindowManagerService 似乎有一个公共方法（
startAppFreezingScreenLocked）来激活它。 这可能是开始寻找答案的好地方，因为不幸的是，您似乎无法直接获取 WindowManagerService 对象。Digging through the Android source found WindowManagerService which seems to have a public method (
startAppFreezingScreenLocked) for activating this. This may be a good place to start looking for your answer, as unfortunately it doesn't seem as though you can directly get a WindowManagerService object.