Programmatically Switching off android phone..

Question

HI all, Can we switch of the phone programmatically..?Please let me know how to do this..?

An my second question is..

how to lock and unlock the screen in android?

i am using following snippet but it didnt worked for me..

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.. Help me to do this in correct way..thanks in advance

Answer 1

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

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?