Use APKPure App
Get Quickly Lock Screen old version APK for Android
Un clic per spegnere schermo e blocco del dispositivo senza toccare il pulsante di alimentazione
One click to turn off screen and lock device without touching power button。
Use the app first，You must activate administrator will allow the app to preform the following operation：Lock Screen.
The app is lightness and no activity.
The app is sample "ABC" locker
You just need to touch the app icon lightly，the phone screen can be turned off quickly.
AppLock can protected you applications