Android Monitor lock screen/Open screen event

1. Two options

(1) Monitoring Broadcastreceiver

(2) Get PowerManager Event

2. Broadcastreceiver

2.1. Events

There are a total of 3 events:

Intent. action_screen_on : Screen lit intent. action_screen_off : Screen off intent. action_user_present  : User Unlocked

2.2. Permissions

Listener user unlocking requires permission to be registered in Androidmanifest

<android: Name/>

2.3. Intentfilter Code

        if (mcontext! = null) {            Intentfilter filter = new Intentfilter ();            Filter.addaction (intent.action_screen_on);            Filter.addaction (Intent.action_screen_off);            Filter.addaction (intent.action_user_present);            Mcontext.registerreceiver (mscreenreceiver, filter);        }

3. PowerManager

        PowerManager manager = (PowerManager) mcontext.getsystemservice (context.power_service);        if (Manager.isscreenon ()) {            if (mscreenstatelistener! = null) {                mscreenstatelistener.onscreenon ();            }        } else {            if (mscreenstatelistener! = null) {                mscreenstatelistener.onscreenoff ();            }        }

4. Code

Import Android.annotation.suppresslint;import Android.content.broadcastreceiver;import android.content.Context; Import Android.content.intent;import android.content.intentfilter;import android.os.powermanager;/** * Created by Xiyanglu on 4/11/15.    */public class Screenobserver {private Context mcontext;    Private Screenbroadcastreceiver Mscreenreceiver;    Private Screenstatelistener Mscreenstatelistener;        Public Screenobserver (Context context) {Mcontext = context;    Mscreenreceiver = new Screenbroadcastreceiver ();        } public void Startobserver (Screenstatelistener listener) {Mscreenstatelistener = listener;        Registerlistener ();    Getscreenstate ();    } public void Shutdownobserver () {Unregisterlistener (); }/** * Gets the screen status */@SuppressLint ("Newapi") private void Getscreenstate () {if (Mcontext = = NULL        ) {return; } PowerManager Manager = (PowerManager) mcontext.getsystemservice (ConteXt.        Power_service); if (Manager.isscreenon ()) {if (Mscreenstatelistener! = null) {Mscreenstatelistener.onscreenon (            );            }} else {if (Mscreenstatelistener! = null) {Mscreenstatelistener.onscreenoff ();  }}} private void Registerlistener () {if (Mcontext! = null) {Intentfilter filter =            New Intentfilter ();            Filter.addaction (intent.action_screen_on);            Filter.addaction (Intent.action_screen_off);            Filter.addaction (intent.action_user_present);        Mcontext.registerreceiver (mscreenreceiver, filter); }} private void Unregisterlistener () {if (Mcontext! = null) Mcontext.unregisterreceiver (MSCREENR    Eceiver);        } private class Screenbroadcastreceiver extends Broadcastreceiver {private String action = null; @Override public void OnReceive (context context, Intent Intent) {ACTIOn = Intent.getaction ();            if (Intent.ACTION_SCREEN_ON.equals (ACTION)) {//Open screen Mscreenstatelistener.onscreenon ();            } else if (Intent.ACTION_SCREEN_OFF.equals (ACTION)) {//Lock screen Mscreenstatelistener.onscreenoff ();            } else if (Intent.ACTION_USER_PRESENT.equals (ACTION)) {//unlock mscreenstatelistener.onuserpresent ();        }}} public interface Screenstatelistener {//Return to caller screen state information public void Onscreenon ();        public void Onscreenoff ();    public void onuserpresent (); }}

5. References

[1] Android monitor screen unlock event http://blog.csdn.net/gf771115/article/details/7991892

Android Monitor lock screen/Open screen event