Question

Possible Duplicate:
Lock the Android device programmatically

Does the application have the ability to lock the screen? I have tried the following code, but nothing happens.

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

Answer 1

Your code looks fine and it should work..

Have you included the required permission in android manifest file.

<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />

And for further reference, If you want the source code for screen lock implementation, then please check this question posted in stackoverflow and a link from android developer site.

Source of Android's lock screen

http://developer.android.com/guide/topics/admin/device-admin.html

http://developer.android.com/reference/android/app/KeyguardManager.KeyguardLock.html