Monitor on-screen light and off status

The status of the listening screen needs to be broadcast, and we must also dynamically register the broadcast to enable the monitor screen to be dimmed (invalid static registration). I am here in the service to do the processing, no technical difficulty, directly on the code.

 PackageCom.kale.camerademo;ImportAndroid.app.Service;ImportAndroid.content.BroadcastReceiver;ImportAndroid.content.Context;Importandroid.content.Intent;ImportAndroid.content.IntentFilter;ImportAndroid.os.IBinder;/** * @author: * @tips: * @web:http://blog.csdn.net/lamp_zy/article/details/7968938* @date: 2014-2-27*/ Public classScreenserviceextendsService {@Override Publicibinder onbind (Intent arg0) {return NULL; }     Public voidonCreate () {Super. OnCreate (); /*registering a broadcast when the screen wakes up*/Intentfilter Mscreenonfilter=NewIntentfilter ("Android.intent.action.SCREEN_ON"); Screenservice. This. Registerreceiver (Mscreenoreceiver, Mscreenonfilter); /*broadcast when registering a machine lock screen*/Intentfilter Mscreenofffilter=NewIntentfilter ("Android.intent.action.SCREEN_OFF"); Screenservice. This. Registerreceiver (Mscreenoreceiver, Mscreenofffilter); }     Public voidOnDestroy () {Super. OnDestroy (); Screenservice. This. Unregisterreceiver (Mscreenoreceiver); }    /*** Lock Screen management class called Keyguardmanager, * by calling its internal class Keyguardlockmkeyguardlock object Disablekeyguard method can cancel the system lock screen, * Newkeyguard The lock parameter is used to identify who is hiding the system lock screen*/    PrivateBroadcastreceiver Mscreenoreceiver =NewBroadcastreceiver () {@Override Public voidOnReceive (Context context, Intent Intent) {String action=intent.getaction (); if(Action.equals ("Android.intent.action.SCREEN_ON") {System.out.println ("--screen_on--"); } Else if(Action.equals ("Android.intent.action.SCREEN_OFF") {System.out.println ("--screen_off--"); }        }    };}

Start the service:

StartService (new Intent (mainactivity.  this, Screenservice. class));

Operation Result:

Monitor on-screen light and off status