1# Common Events of the Theme Framework - Lock Screen 2This document lists the common system events provided by the theme framework - lock screen to applications. Applications can use [APIs](../js-apis-commonEventManager.md) to subscribe to common system events. 3 4## COMMON_EVENT_SCREEN_LOCKED 5Indicates that the screen has been locked. 6 7- Value: usual.event.SCREEN_LOCKED 8- Required subscriber permissions: none 9 10When the screen is locked, the event notification service is triggered to publish this event. 11 12## COMMON_EVENT_SCREEN_UNLOCKED 13Indicates that the screen has been unlocked. 14 15- Value: usual.event.SCREEN_UNLOCKED 16- Required subscriber permissions: none 17 18When the screen is unlocked, the event notification service is triggered to publish this event. 19