How to shutdown an Android mobile programmatically?

Question

Is it possible to shutdown the mobile programmatically. that is with out using su commands..

Answer 1

It is possible, but you need a Rooted Android device with Superuser access. You can't do it without Root unless your app is signed with the System Firmware Key. Try using the following code:

Shutdown:

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

Reboot:

Same code, just use "reboot" instead of "reboot -p".

[On an other note: I read somewhere that these commands do not work on Stock HTC ROMs, but haven't confirmed myself]

Answer 2

You could possibly use the PowerManager to make it reboot (this does not guarantee that it'll reboot - OS may cancel it):

http://developer.android.com/reference/android/os/PowerManager.html#reboot(java.lang.String)

It requires the REBOOT permission:

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?

You cannot do this from an ordinary SDK application. Only applications signed with the system firmware signing key can do this