Android (Notification) message push mechanism

Learn about the Android message push mechanism from online inquiry, as follows:

1. First, the layout file code activity_main.xml

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"Android:layout_width= "Fill_parent"Android:layout_height= "Fill_parent"android:orientation= "Vertical" > <TextView android:layout_width= "Fill_parent"Android:layout_height= "Wrap_content"Android:text= "Hello"/> <Button Android:id= "@+id/btnstart"Android:layout_width= "Fill_parent"Android:layout_height= "Wrap_content"Android:text= "Notification"/> <Button Android:id= "@+id/btnstop"Android:layout_width= "Fill_parent"Android:layout_height= "Wrap_content"Android:text= "Clear"/></linearlayout>

2. Then the Java main Interface code Mainactivity.java

 PackageCom.example.notificationservice;Importandroid.app.Activity;Importandroid.content.Intent;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.widget.Button; Public classMainactivityextendsActivityImplementsOnclicklistener {PrivateButton btnstart; PrivateButton Btnstop; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main);    Initview (); }    Private voidInitview () {btnstart=(Button) Findviewbyid (R.id.btnstart); Btnstop=(Button) Findviewbyid (r.id.btnstop); Btnstart.setonclicklistener ( This); Btnstop.setonclicklistener ( This); } @Override Public voidOnClick (View v) {intID =V.getid (); if(id = =R.id.btnstart) {//Start ServiceIntent Intent =NewIntent (); Intent.setaction ("YMW. My_service ");        StartService (Intent); }        if(id = =r.id.btnstop) {//Close ServiceIntent Intent =NewIntent (); Intent.setaction ("YMW. My_service ");        StopService (Intent); }} @Override Public voidonbackpressed () {System.exit (0); Super. onbackpressed (); }}

3. Then the message push service file Notificationservice.java

 PackageCom.example.notificationservice;Importandroid.app.Notification;ImportAndroid.app.NotificationManager;Importandroid.app.PendingIntent;ImportAndroid.app.Service;ImportAndroid.content.Context;Importandroid.content.Intent;ImportAndroid.os.IBinder; Public classNotificationserviceextendsService {//Get Message Thread    PrivateMessagethread Messagethread =NULL; //Click to view    PrivateIntent messageintent =NULL; PrivatePendingintent messagependingintent =NULL; //Notification Bar Messages    Private intMessagenotificationid = 1000; PrivateNotification messagenotification =NULL; PrivateNotificationmanager Messagenotificatiomanager =NULL;  Publicibinder onbind (Intent Intent) {return NULL; } @Override Public intOnstartcommand (Intent Intent,intFlagsintStartid) {        //InitializeMessagenotification =NewNotification (); Messagenotification.icon=R.drawable.ic_launcher; Messagenotification.tickertext= "New Message"; Messagenotification.defaults=Notification.default_sound; Messagenotificatiomanager=(Notificationmanager) Getsystemservice (Context.notification_service); Messageintent=NewIntent ( This, Mainactivity.class); Messagependingintent= Pendingintent.getactivity ( This, 0, Messageintent,0); //Open ThreadMessagethread =NewMessagethread (); Messagethread.isrunning=true;        Messagethread.start (); return Super. Onstartcommand (Intent, flags, Startid); }    /*** Get messages from server side **/    classMessagethreadextendsThread {//set whether to loop push         Public BooleanIsRunning =true;  Public voidrun () {//While (isrunning) {            Try {                //time intervalThread.Sleep (1000); //Get Server MessagesString ServerMessage =Getservermessage (); if(ServerMessage! =NULL&& "". Equals (ServerMessage)) {                    //Update Notification BarMessagenotification.setlatesteventinfo (Getapplicationcontext (),"New Message", "You have a new message." "                                    +ServerMessage, messagependingintent);                    Messagenotificatiomanager.notify (Messagenotificationid, messagenotification); //the notification ID increments once each notification, to avoid overwriting the messagemessagenotificationid++; }            } Catch(interruptedexception e) {e.printstacktrace (); }            // }}} @Override Public voidOnDestroy () {//system.exit (0);Messagethread.isrunning =false; Super. OnDestroy (); }    /*** Analog Send Message * *@returnreturns the message that the server wants to push, or if it is empty, do not push*/     PublicString getservermessage () {return"News!"; }}

4. Finally, don't forget to configure the service in the Mainfeast.xml file

The project code is linked as follows:

Http://files.cnblogs.com/_ymw/NotificationService_%E5%8D%9A%E5%AE%A2%E9%99%84%E4%BB%B6.rar

Android (Notification) message push mechanism