How to programmatically lock screen in Android?

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Lock the android device programatically

How can I programmatically lock the screen in Android?

score 15 · Answer 1 · edited May 23 '17 at 11:46

15

Check this class : com.android.internal.policy.impl.LockScreen

Referenced from here: Can you lock screen from your app?

Also check code for enabling and disabling lock Screen in Android. (Referenced from here)

KeyguardManager keyguardManager = (KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE); 
KeyguardLock lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE);

For locking the screen use,

lock.reenableKeyguard();

and for disabling the lock use,

lock.disableKeyguard()

edited May 23 '17 at 11:46

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answered Aug 29 '10 at 11:34

YoK

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i test this code,but this not working – Mecid Aug 31 '10 at 07:57
Can you share code what you tried? and What issues you are facing with it ? – YoK Aug 31 '10 at 08:08
6

This code will not work on SDK 8 and above do use Adams suggestion on using device policy manager. – JehandadK Jul 02 '12 at 07:16
This does not work for me – varghesekutty Sep 25 '14 at 10:28

score 4 · Answer 2 · answered Jan 14 '11 at 19:27

In order to do this you need to use the Device Administration API that was added in (I think) 2.2. Once your app is registered on the device as a device administrator, you can then use DevicePolicyManager.lockNow() to lock the screen. The DeviceAdmin sample application in the SDK is a good place to look as well.

How to programmatically lock screen in Android?

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