以编程方式关闭 Android 手机
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原文地址: http://stackoverflow.com/questions/3745523/
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Programmatically switching off Android phone
提问by Sri Sri
Can we switch off an Android phone programmatically?
我们可以以编程方式关闭 Android 手机吗？
I am using following snippet but it didn't work for me.
我正在使用以下代码段，但它对我不起作用。
KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Activity.KEYGUARD_SERVICE);
KeyguardLock lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE);
lock.disableKeyguard(); // to disable
lock.reenableKeygaurd();// to enable
and I used the permission also.
我也使用了许可。
采纳答案by xil3
You could possibly use the PowerManager to make it reboot (this does not guarantee that it'll reboot - OS may cancel it):
您可以使用 PowerManager 使其重新启动（这并不能保证它会重新启动 - 操作系统可能会取消它）：
http://developer.android.com/reference/android/os/PowerManager.html#reboot(java.lang.String)
http://developer.android.com/reference/android/os/PowerManager.html#reboot(java.lang.String)
It requires the REBOOT permission:
它需要 REBOOT 权限：
http://developer.android.com/reference/android/Manifest.permission.html#REBOOT
http://developer.android.com/reference/android/Manifest.permission.html#REBOOT
Can you also check your logcat when trying to enable/disable keyguard, and post what's there?
您还可以在尝试启用/禁用键盘保护时检查您的 logcat，并发布其中的内容吗？
回答by Sheharyar
As CommonsWare already saidthat this is not possible in an Ordinary SDK Application. You need to sign your app with the System Firmware Key. But it's possible for your app with Rootprivileges. Try using the following code (if you have SU access):
正如CommonsWare 已经说过的，这在普通 SDK 应用程序中是不可能的。您需要使用System Firmware Key. 但是您的应用程序可能具有Root特权。尝试使用以下代码（如果您有 SU 访问权限）：
Shutdown:
关掉：
try {
Process proc = Runtime.getRuntime()
.exec(new String[]{ "su", "-c", "reboot -p" });
proc.waitFor();
} catch (Exception ex) {
ex.printStackTrace();
}
Restart:
重新开始：
Same code, just use "reboot"instead of "reboot -p".
相同的代码，只需使用"reboot"而不是"reboot -p".
[On an other note: I read somewhere that these commands do not work on Stock HTC ROMs, but haven't confirmed myself]
[另外一个注意事项：我在某处读到这些命令在 Stock HTC ROM 上不起作用，但我自己还没有确认]
回答by CommonsWare
You cannot do this from an ordinary SDK application. Only applications signed with the system firmware signing key can do this.
您无法从普通 SDK 应用程序执行此操作。只有使用系统固件签名密钥签名的应用程序才能执行此操作。
回答by tristan2468
A much better solution is to run:
一个更好的解决方案是运行：
su -c am start -a android.intent.action.ACTION_REQUEST_SHUTDOWN
su -c am start -a android.intent.action.ACTION_REQUEST_SHUTDOWN
You can use a Processfor this.
您可以Process为此使用 a 。
回答by Rupert Rawnsley
If you have the sigOrSystem permission android.permission.SHUTDOWN you can raise the protected ACTION_REQUEST_SHUTDOWN Intent like this:
如果你有 sigOrSystem 权限 android.permission.SHUTDOWN 你可以像这样提高受保护的 ACTION_REQUEST_SHUTDOWN Intent：
Intent intent = new Intent("android.intent.action.ACTION_REQUEST_SHUTDOWN");
intent.putExtra("android.intent.extra.KEY_CONFIRM", false);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
Note that prior to Android 4.0, this permission was signature only.
请注意，在 Android 4.0 之前，此权限仅为签名权限。
回答by Rich
Actually, the above responses are not completely accurate, in my experience. I was experimenting with ways to dim the screen and found that the following:
实际上，根据我的经验，上述回答并不完全准确。我正在尝试使屏幕变暗的方法，发现以下内容：
Window w = getWindow();
WindowManager.LayoutParams lp = w.getAttributes();
lp.screenBrightness =.005f;
w.setAttributes (lp);
will actually turn my Samsung Galaxy Tab off if, instead of 0.005, I use a screen brightness value of 0.
如果我使用屏幕亮度值 0 而不是 0.005，实际上会关闭我的三星 Galaxy Tab。
I suspect this is bug somewhere, but I don't have sufficient hardware to test the code on other Android models. Hence, I can't really tell you what will happen on your phone. I can tell you that my code shuts of my phone even completely unsigned.
我怀疑这是某个地方的错误，但我没有足够的硬件来测试其他 Android 型号上的代码。因此，我无法真正告诉您手机上会发生什么。我可以告诉你，即使完全没有签名，我的代码也会关闭我的手机。
