public static final String ACTION_USER_PRESENTSince: API Level 3 Broadcast Action: Sent when the user is present after device wakes up (e.g when the keyguard is gone).This is a protected intent that can only be sent by the system.Constant Value: "android.intent.action.USER_PRESENT"
Broadcast Action: Sent when the user is present after device wakes up (e.g when the keyguard is gone).This is a protected intent that can only be sent by the system.Constant Value: "android.intent.action.USER_PRESENT"
比如有些第三方桌面不会真正的锁屏,360,LBE等安全软件对广播的拦截等等