如何关闭Android设备？

Question

How could I power off an android device via java code?
Is it even possible? Do I need special permissions to do this?

Answer 1

There is no API in the Android SDK to allow user apps to do this.

The closest you could perhaps try would be PowerManager.goToSleep() .

Answer 2

Yes, It is possible but you need a Rooted device with Superuser Access. Try using the following code:

try {
    Process proc = Runtime.getRuntime()
                    .exec(new String[]{ "su", "-c", "reboot -p" });
    proc.waitFor();
} catch (Exception ex) {
    ex.printStackTrace();
}

If you plan on doing this without Root Privileges , forget it. The only way to do that is to use PowerManager but that won't work unless your app is signed with the System Firmware Key .

[via Programmatically switching off Android phone ]