Lock Screen

Lock Screen of your device.
Create shortcuts on your home screen to lock screen of your device with one click.

When you first start the app you need to enable the administrator to lock the screen.
You need not do it when you run the app next time.

You need to deactivate ‘Lock Screen’ before you uninstall it.
You can deactivate it by following operation: click "Settings—>Security—>Device administrators" and deselect the Lock Screen.
Now you can unistall Lock Screen in Application manager.