Cập nhật vào ngày Aug 17, 2020
An Android application that turns screen off and locks the device upon request and when answering a call. Also Useful when the proximity sensor is disabled or In a situation that the device has no proximity sensor.
Note that:
* This app uses the Device Administrator permission.
* Install : you have to go to settings->security->Device administrators to turb on screen on first/
* Uninstall:you have to go to "Settings—>Security—>Device administrators" to shut off Lock screen first.