Android MultiCast Push Notifications Using GCM [Greeting App] _ Android Tutorial

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Android MultiCast Push Notificationsusing GCM [Greeting App]Posted By Android Guru on Sep 23, 2014 | 18 Comments

In the previous posts, I discussed What is GCM and how to send Push notifications using GCM service. In this post,

I am going to develop simple Android application called Greeting App to demonstrate how to send Push

notifications to multiple devices.

I would recommend you to quickly take a look at the previous posts (Read: Introduction to GCM | How to send

push notifications using GCM service?) so that you will get to know about basics of GCM.

What is GCM?

Google Cloud Messaging is a free service from Google which helps us to send messages (Push notifications) to

Users device. It can also be used to send message from Users device to GCM server.

Here is the video demo of the Application we are about to develop, watch it.

Video Demo

I believe you got to know about the application from video demo.

Home GCM Android MultiCast Push Notifications using GCM [Greeting App]

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How it works technically?

Steps involved in sending Greeting as Push notifications:

Developing the application involves two parts:

1. GCM Server Application Create Web application using Php to send Greeting to User via GCM Cloud server

2. GCM Client Application Create Android application which receive Greeting sent from GCM Server Web App

Prerequisite

You need to have Google Project Key, API Server Key, and GCM RegId with you in order to send and receive

Message.

Steps to create Google Project Key:

It is a simple android application which shows the Greeting sent by sender.

Once sender composed the greeting and sent it to the selected Users. Greeting will arrive in mobile devices

of selected Users

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You can download source code from here if you dont want to create Application from scratch, otherwise please

proceed with below listings.

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Goto https://console.developers.google.com/project and then create Project.

Enter Project name and click create, a project will be created.

You can see Project ID, note it down as it will be used in Step 4 of GCM Client Application.

Steps to create API Server Key:

Enable Google Cloud Messaging as shown below.

https://console.developers.google.com/project



Create Server Key as shown below,

Enter your public address in order to white-list a set of IP addresses as the server key is mapped to IP addresses

for security purpose. (Get your public IP address by googling my public ip address in Google) and click create.

You can see SERVER_API_KEY, note it down as it will be used in Step 2 of GCM Server Application creation.



You dont need to worry about creating GCM RegId, as it will be created inside Android application which we will

discuss in some time later.

[pglinkadssmall1]

GCM Server Application

I chose PHP/MySQL combo for creating API to connect and Android device to MySQL DB since the configuration

is simple and easy and also it will be easy for you to start with.

Step 1: Create DB and Table in MySQL

1. Create database called db in phpMyAdmin or create it through command:

2. Select database db in phpMyAdmin or select it through command:

3. Create table called gcmusers in phpMyAdmin by pasting below SQL script in SQL Query box:

Step 2: Create Php files under gcmwebapp folder under Apaches www

config.php:

Has configuration variable like DB Host, DB Username and DB Pasword.

db_connect.php:

Has methods to open and close DB connection.

createdatabasedb

usedb

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CREATETABLEIFNOTEXISTS`gcmusers`(ìdìnt(11)NOTNULLAUTO_INCREMENT,èmailid`varchar(50)NOTNULL,`gcmregid`varchar(500)NOTNULL,PRIMARYKEY(ìd`))

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db_functions.php:

Has methods to perform DB operations.

insertuser.php:

Insert Users email id and gcm reg id in DB.

processmessage.php:

Send greeting json to selected users.

Download processmessage.php from here.

viewusers.php:

Greeting web app screen that display list of users, greeting cards etc.,

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}//Closingdatabaseconnectionpublicfunctionclose(){mysql_close();}}?>

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ViewUsers

body{font:normalmedium/1.4sansserif;}div.greetblock,div.serverresponse{bordercollapse:collapse;width:60%;marginleft:auto;marginright:auto;

http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.jshttp://programmerguru.com/android-tutorial/wp-content/uploads/2014/09/processmessage.txt



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align:center;}tr>td{padding:0.25rem;textalign:center;border:1pxsolid#ccc;}tr:nthchild(even){background:#fff;}tr:nthchild(odd){background:#FA9A8B;color:#fff;}tr#header{background:#F78371;}div#norecord{margintop:10px;width:15%;marginleft:auto;marginright:auto;}input,select{cursor:pointer;}img{margintop:10px;height:200px;width:300px;}select{width:200px}div.leftdiv{width:45%;padding:010px;float:left;border:1pxsolid#ccc;margin:5px;height:320px;textalign:center;}div.rightdiv{width:45%;padding:010px;float:right;border:1pxsolid#ccc;margin:5px;height:320px;textalign:center;}hidediv{display:none;}p.header{height:40px;backgroundcolor:#EB5038;padding:10px;color:#fff;textalign:center;margin:0;marginbottom:10px;}textarea{fontsize:25px;fontweight:bold;}

functionsendMsg(){varmsgLength=$.trim($("textarea").val()).length;varcheckedCB=$("input[type='checkbox']:checked").length;if(checkedCB==0){alert("YoumustselectatleastoneUsertosendmessage");}elseif(msgLength==0){alert("Youleftthemessagefieldblank,pleasefillit");}else{varformData=$(".wrapper").find("input").serialize()+"&imgurl="+$("#festival"$.ajax({type:"POST",data:formData,url:"processmessage.php",success:function(res){$(".greetblock").slideUp(1000);$(".serverresponse").prepend(res).hide().fadeIn(2000);}});}}$(function(){$(".serverresponse").hide()$("input[type='checkbox']").click(function(){if($(this).is(':checked')){$(this).parent().css("border","3pxsolidred");}else{$(this).parent().css("border","0px");}});$("div.leftdiv,div.rightdiv").hover(function(){$(this).css("background","#FAFAFA");},function(){$(this).css("background","#fff");});$("#festival").change(function(){$("img").attr("src",$(this).val());});$("#sendmsg").click(function(){



Step 3: Update API Server Key

Update API_SERVER_KEY in function sendMessageThroughGCM present in processmessage.php with the one

you created.

GCM Client Application

Step 1: Create Android Application Project

Step 2: Add library to project

Add below third party library into projects libs folder. You can also download it if you dont have it with you.

1. Android Asynchronous Http Client An asynchronous callback-based Http client for Android built on top of

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$(".serverresponse").fadeOut(300,function(){$(".greetblock").fadeIn(1000);});});});

SelectUserstowhomyouwanttosendGreetingmessage

IdEmailIdSendMessage?



Apaches HttpClient libraries which is used by Pinterest, Instagram etc.,. Download

Step 3: Setup Google Play Services library project

To write GCM client application, we need to use the GoogleCloudMessaging API. To use this API, we must set up

the project to use the Google Play services SDK.

Take help from here to setup Google Play Service library project.

Step 4: Design Screens

We are going to have two activities:

MainActivity Launch Screen of the Application

GreetingActivity Greeting Screen of the Application

Before creating the layouts, make sure below resources are added.

Add string resources to strings.xml present under /res/values folder.

strings.xml

Add dimension resource to dimens.xml present under /res/values folder.

dimens.xml

Add color resources to colors.xml present under /res/values folder.

colors.xml

Create bg_button_rounded.xml under /res/drawable-mdpi folder and add below code to it.

bg_button_rounded.xml

Create bg_form_rounded.xml under /res/drawable-mdpi folder and add below code to it.

bg_form_rounded.xml

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GCMGreetingAppHelloworld!SettingsGCMGreetingAppEmailAddressRegisterMeDon\'thaveaccount?SignUpMessagesentbyserverwillappearhere.MessageHelloUser

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16dp16dp

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#ffffff#000000#EB5038#CA3822#A92815

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https://developer.android.com/google/play-services/setup.html#Setuphttp://schemas.android.com/apk/res/androidhttps://github.com/loopj/android-async-http/raw/master/releases/android-async-http-1.4.4.jarhttp://schemas.android.com/apk/res/android



Create bg_gradient.xml under /res/drawable-mdpi folder and add below code to it.

bg_gradient.xml

Create two layout XMLs under /res/layout folder:

activity_main.xml

Launch Screen

activity_greeting.xml

Greeting Screen

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Step 5: ApplicationConstants.java

We are done with Layout designing, let us jump into Coding.

Create ApplicationConstants.Java under the package com.prgguru.example and fill it with below code. It has

constants used across application. Make sure your updated Google_Project_Key with the one you created above.

Step 6: Utility.java

Create Utility.Java under the package com.prgguru.example and fill it with below code. It has Utility methods.

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android:background="@drawable/bg_gradient"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context=".GreetingActivity">

Make sure you changed the IP address mentioned in the APP_SERVER_URL constant with your Machine/LAN IP

address.

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packagecom.prgguru.example;publicinterfaceApplicationConstants{//PhpApplicationURLtostoreRegIDcreatedstaticfinalStringAPP_SERVER_URL="http://192.168.2.4:9000/gcmwebapp/insertuser.php//GoogleProjectNumberstaticfinalStringGOOGLE_PROJ_ID="837715578074";staticfinalStringMSG_KEY="m";}

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packagecom.prgguru.example;importjava.util.regex.Matcher;importjava.util.regex.Pattern;/***ClasswhichhasUtilitymethods**/publicclassUtility{privatestaticPatternpattern;privatestaticMatchermatcher;//EmailPatternprivatestaticfinalStringEMAIL_PATTERN="^[_AZaz09\\+]+(\\.[_AZaz09]+)*@"+"[AZaz09]+(\\.[AZaz09]+)*(\\.[AZaz]{2,})$";/***ValidateEmailwithregularexpression**@paramemail*@returntrueforValidEmailandfalseforInvalidEmail*/publicstaticbooleanvalidate(Stringemail){pattern=Pattern.compile(EMAIL_PATTERN);matcher=pattern.matcher(email);

DEVELOPERHighlight

DEVELOPERHighlight

http://192.168.2.4:9000/gcmwebapp/insertuser.php



Step 7: MainActivity.java

Create MainActivity.Java under the package com.prgguru.example and fill it with below code.

It is the launch screen activity which asks User to enter Email ID, once Email ID is submitted Application will try to

register Users device in Google Cloud Messaging server. Registration Id will be generated once the registration is

successfully completed.

Registration Id will be stored in GCM Server Application (created above) as text file (GCMRegId.txt).

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returnmatcher.matches();}}

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packagecom.prgguru.example;importjava.io.IOException;importandroid.app.Activity;importandroid.app.ProgressDialog;importandroid.content.Context;importandroid.content.Intent;importandroid.content.SharedPreferences;importandroid.os.AsyncTask;importandroid.os.Bundle;importandroid.text.TextUtils;importandroid.view.View;importandroid.widget.EditText;importandroid.widget.Toast;importcom.google.android.gms.common.ConnectionResult;importcom.google.android.gms.common.GooglePlayServicesUtil;importcom.google.android.gms.gcm.GoogleCloudMessaging;importcom.loopj.android.http.AsyncHttpClient;importcom.loopj.android.http.AsyncHttpResponseHandler;importcom.loopj.android.http.RequestParams;publicclassMainActivityextendsActivity{ProgressDialogprgDialog;RequestParamsparams=newRequestParams();GoogleCloudMessaginggcmObj;ContextapplicationContext;StringregId="";privatefinalstaticintPLAY_SERVICES_RESOLUTION_REQUEST=9000;AsyncTaskcreateRegIdTask;publicstaticfinalStringREG_ID="regId";publicstaticfinalStringEMAIL_ID="eMailId";EditTextemailET;@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);applicationContext=getApplicationContext();emailET=(EditText)findViewById(R.id.email);prgDialog=newProgressDialog(this);//SetProgressDialogTextprgDialog.setMessage("Pleasewait...");//SetCancelableasFalseprgDialog.setCancelable(false);SharedPreferencesprefs=getSharedPreferences("UserDetails",Context.MODE_PRIVATE);StringregistrationId=prefs.getString(REG_ID,"");if(!TextUtils.isEmpty(registrationId)){Intenti=newIntent(applicationContext,GreetingActivity.class);i.putExtra("regId",registrationId);startActivity(i);finish();}}//WhenRegisterMebuttonisclickedpublicvoidRegisterUser(Viewview){StringemailID=emailET.getText().toString();if(!TextUtils.isEmpty(emailID)&&Utility.validate(emailID)){//CheckifGooglePlayServiceisinstalledinDevice//PlayservicesisneededtohandleGCMstuffsif(checkPlayServices()){//RegisterDeviceinGCMServerregisterInBackground(emailID);}}//WhenEmailisinvalidelse{Toast.makeText(applicationContext,"Pleaseentervalidemail",Toast.LENGTH_LONG).show();}}//AsyncTasktoregisterDeviceinGCMServerprivatevoidregisterInBackground(finalStringemailID){newAsyncTask(){@OverrideprotectedStringdoInBackground(Void...params){Stringmsg="";try{if(gcmObj==null){



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gcmObj=GoogleCloudMessaging.getInstance(applicationContext);}regId=gcmObj.register(ApplicationConstants.GOOGLE_PROJ_ID);msg="RegistrationID:"+regId;}catch(IOExceptionex){msg="Error:"+ex.getMessage();}returnmsg;}@OverrideprotectedvoidonPostExecute(Stringmsg){if(!TextUtils.isEmpty(regId)){storeRegIdinSharedPref(applicationContext,regId,emailID);Toast.makeText(applicationContext,"RegisteredwithGCMServersuccessfully.\n\n"+msg,Toast.LENGTH_SHORT).show();}else{Toast.makeText(applicationContext,"RegIDCreationFailed.\n\nEitheryouhaven'tenabledInternetorGCMserverisbusyrightnow.MakesureyouenabledInternetandtryregisteringagainaftersometime."+msg,Toast.LENGTH_LONG).show();}}}.execute(null,null,null);}//StoreRegIdandEmailenteredbyUserinSharedPrefprivatevoidstoreRegIdinSharedPref(Contextcontext,StringregId,StringemailID){SharedPreferencesprefs=getSharedPreferences("UserDetails",Context.MODE_PRIVATE);SharedPreferences.Editoreditor=prefs.edit();editor.putString(REG_ID,regId);editor.putString(EMAIL_ID,emailID);editor.commit();storeRegIdinServer(regId,emailID);}//ShareRegIDandEmailIDwithGCMServerApplication(Php)privatevoidstoreRegIdinServer(StringregId2,StringemailID){prgDialog.show();params.put("emailId",emailID);params.put("regId",regId);System.out.println("Emailid="+emailID+"RegId="+regId);//MakeRESTfulwebservicecallusingAsyncHttpClientobjectAsyncHttpClientclient=newAsyncHttpClient();client.post(ApplicationConstants.APP_SERVER_URL,params,newAsyncHttpResponseHandler(){//WhentheresponsereturnedbyRESThasHttp//responsecode'200'@OverridepublicvoidonSuccess(Stringresponse){//HideProgressDialogprgDialog.hide();if(prgDialog!=null){prgDialog.dismiss();}Toast.makeText(applicationContext,"RegIdsharedsuccessfullywithWebApp",Toast.LENGTH_LONG).show();Intenti=newIntent(applicationContext,GreetingActivity.class);i.putExtra("regId",regId);startActivity(i);finish();}//WhentheresponsereturnedbyRESThasHttp//responsecodeotherthan'200'suchas'404',//'500'or'403'etc@OverridepublicvoidonFailure(intstatusCode,Throwableerror,Stringcontent){//HideProgressDialogprgDialog.hide();if(prgDialog!=null){prgDialog.dismiss();}//WhenHttpresponsecodeis'404'if(statusCode==404){Toast.makeText(applicationContext,"Requestedresourcenotfound",Toast.LENGTH_LONG).show();}//WhenHttpresponsecodeis'500'elseif(statusCode==500){Toast.makeText(applicationContext,"Somethingwentwrongatserverend",Toast.LENGTH_LONG).show();}//WhenHttpresponsecodeotherthan404,500else{Toast.makeText(applicationContext,"UnexpectedErrorocccured![MostcommonError:Devicemight"+"notbeconnectedtoInternetorremoteserverisnotupandrunning],checkforothererrorsaswell"Toast.LENGTH_LONG).show();}}});}//CheckifGooglePlayservicesisinstalledinDeviceornot



Step 8: GreetingActivity.java

Create GreetingActivity.Java under the package com.prgguru.example and fill it with below code.

It is the Greeting screen activity which display the message sent from GCM Server Application.

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privatebooleancheckPlayServices(){intresultCode=GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);//WhenPlayservicesnotfoundindeviceif(resultCode!=ConnectionResult.SUCCESS){if(GooglePlayServicesUtil.isUserRecoverableError(resultCode)){//ShowErrordialogtoinstallPlayservicesGooglePlayServicesUtil.getErrorDialog(resultCode,this,PLAY_SERVICES_RESOLUTION_REQUEST).show();}else{Toast.makeText(applicationContext,"Thisdevicedoesn'tsupportPlayservices,Appwillnotworknormally"Toast.LENGTH_LONG).show();finish();}returnfalse;}else{Toast.makeText(applicationContext,"ThisdevicesupportsPlayservices,Appwillworknormally",Toast.LENGTH_LONG).show();}returntrue;}//WhenApplicationisresumed,checkforPlayservicessupporttomakesure//appwillberunningnormally@OverrideprotectedvoidonResume(){super.onResume();checkPlayServices();}}

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packagecom.prgguru.example;importorg.json.JSONException;importorg.json.JSONObject;importandroid.app.Activity;importandroid.app.ProgressDialog;importandroid.content.Context;importandroid.content.SharedPreferences;importandroid.os.Bundle;importandroid.widget.TextView;importandroid.widget.Toast;importcom.androidquery.AQuery;importcom.google.android.gms.common.ConnectionResult;importcom.google.android.gms.common.GooglePlayServicesUtil;publicclassGreetingActivityextendsActivity{TextViewemailET;privateAQueryaq;//ProgressDialogbarobjectProgressDialogprgDialog;privatefinalstaticintPLAY_SERVICES_RESOLUTION_REQUEST=9000;@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_test);aq=newAQuery(this);Stringjson=getIntent().getStringExtra("greetjson");SharedPreferencesprefs=getSharedPreferences("UserDetails",Context.MODE_PRIVATE);emailET=(TextView)findViewById(R.id.greetingmsg);//CheckifGooglePlayServiceisinstalledinDevice//PlayservicesisneededtohandleGCMstuffsif(!checkPlayServices()){Toast.makeText(getApplicationContext(),"Thisdevicedoesn'tsupportPlayservices,Appwillnotworknormally"Toast.LENGTH_LONG).show();}//Whenjsonisnotnullif(json!=null){try{JSONObjectjsonObj=newJSONObject(json);SharedPreferences.Editoreditor=prefs.edit();editor.putString("greetimgurl",jsonObj.getString("greetImgURL"));editor.putString("greetmsg",jsonObj.getString("greetMsg"));editor.commit();emailET.setText(prefs.getString("greetmsg",""));//RenderImagereadfromImageURLusingaquery'image'methodaq.id(R.id.greetimg).progress(R.id.progress).image(prefs.getString("greetimgurl",""),true,true,0,0,null,AQuery.FADE_IN);}catch(JSONExceptione){//TODOAutogeneratedcatchblocke.printStackTrace();}}//WhenJsonisnull



Step 9: GcmBroadcastReceiver.java

Create GcmBroadcastReceiver.Java under the package com.prgguru.example and fill it with below code.

A broadcast receiver is the mechanism GCM uses to deliver messages. When message is sent through GCM

Server application, it triggers the broadcast receivers onReceive() method, which has the responsibility of making

sure that the GCM message gets handled.

A WakefulBroadcastReceiver is a special type of broadcast receiver that takes care of creating and managing a

partial wake lock for your app.

Step 10: GCMNotificationIntentService.java

Create GcmBroadcastReceiver.Java under the package com.prgguru.example and fill it with below code.

The intent service shown below does the actual work of handling the GCM message. This class processes the

GCM message based on message type, and posts the result in a notification.

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elseif(!"".equals(prefs.getString("greetimgurl",""))&&!"".equals(prefs.getString(emailET.setText(prefs.getString("greetmsg",""));aq.id(R.id.greetimg).progress(R.id.progress).image(prefs.getString("greetimgurl",""),true,true,0,0,null,AQuery.FADE_IN);}}//CheckifGooglePlayservicesisinstalledinDeviceornotprivatebooleancheckPlayServices(){intresultCode=GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);//WhenPlayservicesnotfoundindeviceif(resultCode!=ConnectionResult.SUCCESS){if(GooglePlayServicesUtil.isUserRecoverableError(resultCode)){//ShowErrordialogtoinstallPlayservicesGooglePlayServicesUtil.getErrorDialog(resultCode,this,PLAY_SERVICES_RESOLUTION_REQUEST).show();}else{Toast.makeText(getApplicationContext(),"Thisdevicedoesn'tsupportPlayservices,Appwillnotworknormally"Toast.LENGTH_LONG).show();finish();}returnfalse;}else{Toast.makeText(getApplicationContext(),"ThisdevicesupportsPlayservices,Appwillworknormally",Toast.LENGTH_LONG).show();}returntrue;}//WhenApplicationisresumed,checkforPlayservicessupporttomakesure//appwillberunningnormally@OverrideprotectedvoidonResume(){super.onResume();checkPlayServices();}}

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packagecom.prgguru.example;importandroid.app.Activity;importandroid.content.ComponentName;importandroid.content.Context;importandroid.content.Intent;importandroid.support.v4.content.WakefulBroadcastReceiver;publicclassGcmBroadcastReceiverextendsWakefulBroadcastReceiver{@OverridepublicvoidonReceive(Contextcontext,Intentintent){ComponentNamecomp=newComponentName(context.getPackageName(),GCMNotificationIntentService.class.getName());startWakefulService(context,(intent.setComponent(comp)));setResultCode(Activity.RESULT_OK);}}

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packagecom.prgguru.example;importandroid.app.IntentService;importandroid.app.Notification;importandroid.app.NotificationManager;importandroid.app.PendingIntent;importandroid.content.Context;importandroid.content.Intent;importandroid.os.Bundle;importandroid.support.v4.app.NotificationCompat;importcom.google.android.gms.gcm.GoogleCloudMessaging;publicclassGCMNotificationIntentServiceextendsIntentService{//SetsanIDforthenotification,soitcanbeupdatedpublicstaticfinalintnotifyID=9001;NotificationCompat.Builderbuilder;publicGCMNotificationIntentService(){super("GcmIntentService");}



Demo

Thats all. Its time to test our code.

Run the application using emulator or device by right clicking on the project >> Run as >> Android applicaiton >>

Choose emulator or device.

Download Source Code

[pglinkadssmall]

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Reference

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publicstaticfinalStringTAG="GCMNotificationIntentService";@OverrideprotectedvoidonHandleIntent(Intentintent){Bundleextras=intent.getExtras();GoogleCloudMessaginggcm=GoogleCloudMessaging.getInstance(this);StringmessageType=gcm.getMessageType(intent);if(!extras.isEmpty()){if(GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR.equals(messageType)){sendNotification("Senderror:"+extras.toString());}elseif(GoogleCloudMessaging.MESSAGE_TYPE_DELETED.equals(messageType)){sendNotification("Deletedmessagesonserver:"+extras.toString());}elseif(GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals(messageType)){sendNotification(""+extras.get(ApplicationConstants.MSG_KEY));//WhenMessageisreceivednormallyfromGCMCloudServer}}GcmBroadcastReceiver.completeWakefulIntent(intent);}privatevoidsendNotification(StringgreetMsg){IntentresultIntent=newIntent(this,GreetingActivity.class);resultIntent.putExtra("greetjson",greetMsg);resultIntent.setAction(Intent.ACTION_MAIN);resultIntent.addCategory(Intent.CATEGORY_LAUNCHER);PendingIntentresultPendingIntent=PendingIntent.getActivity(this,0,resultIntent,PendingIntent.FLAG_ONE_SHOT);NotificationCompat.BuildermNotifyBuilder;NotificationManagermNotificationManager;mNotificationManager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);mNotifyBuilder=newNotificationCompat.Builder(this).setContentTitle("Alert").setContentText("You'vereceivednewmessages.").setSmallIcon(R.drawable.ic_launcher);//SetpendingintentmNotifyBuilder.setContentIntent(resultPendingIntent);//SetVibrate,SoundandLightintdefaults=0;defaults=defaults|Notification.DEFAULT_LIGHTS;defaults=defaults|Notification.DEFAULT_VIBRATE;defaults=defaults|Notification.DEFAULT_SOUND;mNotifyBuilder.setDefaults(defaults);//SetthecontentforNotificationmNotifyBuilder.setContentText("NewmessagefromServer");//SetautocancelmNotifyBuilder.setAutoCancel(true);//PostanotificationmNotificationManager.notify(notifyID,mNotifyBuilder.build());}}

Entire project is zipped and is available for download. Unzip the downloaded project and to import the project

into eclipse, launch eclipse >> File >> Import.. >> Choose downloaded project(How to import android project in

eclipse).

*apk in Android is the installation file similar to exe in windows.

Download Source Code

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http://programmerguru.com/android-tutorial/how-to-import-android-project-in-eclipse/http://programmerguru.com/verify-user?tutorial=Android&download_file=GCMGreetingApp



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18Comments ProgrammerGuruTutorialBlog Login

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Jointhediscussion

Reply

Jigar amonthago

Thankyousomuchforthistutorial!!Goodgoing!YOUareAWESOME!:)^_^

Reply

AndroidGuru amonthagoMod >Jigar

Thanksyou.

Reply

FrancescoFerigo 2monthsago

Manymanythanks

Reply

AndroidGuru 2monthsagoMod >FrancescoFerigo

Youarewelcome.

Reply

Ray 2monthsago

HI,I'MHAVINGPROBLEMSWITHTHAT

AsyncHttpClientclient=newAsyncHttpClient()

client.post(ApplicationConstants.APP_SERVER_URL,params,

newAsyncHttpResponseHandler(){

//WhentheresponsereturnedbyRESThasHttp

//responsecode'200'

@Override

Reply

AndroidGuru 2monthsagoMod >Ray

YouneedtouseyourserverURL.1

Reply

joe 3monthsago

GreatJobonthetutorial..butiamhavingsometroublewiththeapp..Irantheappandtheserver..butwheniruntheappittellsme"Thisappwon'trununlessyouupdategoogleplayservices"?iamrunningaemulator..

thankyou.

Reply

AndroidGuru 2monthsagoMod >joe

GooglePlayServiceisneededforinvokingGCMservice.ItistheprecheckIamdoingincode.

Reply

abul 3monthsago

"Youarealwayswelcometoprovideyourcommentsandfeedbackfromcommentbox."

I'dtrytodiscussaboutthisproject,butmyquestionshaveneverbeenapproved.ckckck

AndroidGuru 2monthsagoMod >abul

HIAbul,

IamnotfulltimebloggersowhenIgettimeIwritetutorialsandalsoapprovecomments.Youcanseeyourquestionstoday.:)

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Author: Android Guru

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Reply

Reply

abul 3monthsago

whyigotfailure?wherecaniseetheerror?1

Reply

AndroidGuru 2monthsagoMod >abul

Pleaseseetheerrorinlogcat.

Reply

joe 3monthsago

Ihavesuccessfullycreatedandrantheapp,butwheniopenedtheappandtrytoregister..itcreatedtheregisteridbutthengivesmeanerror

UnexpectedErrorOcccured~[MostCommonError:Devicenotbeconnectedtointernetorremoteserverisnotupandrunning,checkothererrorsaswell.

Iamrunningxampponlocalhost.

pleasehelp..thankyou

Reply

AndroidGuru 2monthsagoMod >joe

DidyouchangetheIPaddressinJavafiletoyourLANIPaddress?

Reply

abul 3monthsago

i'dsuccessrunthisproject,i'dsendmessagesuccessfullybutsuddenlyigotfail:{"multicast_id":....,"success":0,"failure":1,"canonical_ids":0,"results":[{"error":"NotRegistered"}]}.ihavetoreinstalltheapplicationordeletemydevice'sdatafromtheDBandreregistersoIcansendmessagessuccessfullyagain.Itoccuredrepeatly.whydidithappen?andhowcanichecktheerrorthatmakemegotfailedtosendmessage?

3

Reply

RahulChauhan 4monthsago

Nicepostbuddy.

Reply

MonowarHossain 4monthsago

Wow!VeryNicepostandalsohelpful.Iamreallysurprisedtoreadthispost.IknowhereaboutGCM.NicepostBOSS!!!

Reply

AndroidGuru 4monthsagoMod >MonowarHossain

Thankyou.1

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Android MultiCast Push Notifications Using GCM [Greeting App] _ Android Tutorial