Firebase Cloud Messaging (FCM)

Google has an alternative which is easier than gcm. So today in this Firebase Cloud Messaging Tutorial I will teach you how to send push notification to single android devices using Firebase Cloud Messaging.


 Points to integrate fcm in your project.

1. Crate a project in android studio. 
2. Open build.gradle(project) and add a class path to it(
   classpath 'com.google.gms:google-services:3.0.0'). After adding the class path it will be look like this-
   
   

   // Top-level build file where you can add configuration options common to all sub-projects/modules.
   buildscript {
       repositories {
           jcenter()
       }
   
       dependencies {
           classpath 'com.android.tools.build:gradle:2.2.0'
   
           //________class path for google service
           classpath 'com.google.gms:google-services:3.0.0'
           // NOTE: Do not place your application dependencies here; they belong
           // in the individual module build.gradle files
       }
   }
   
   allprojects {
       repositories {
           jcenter()
       }
   }
   
   task clean(type: Delete) {
       delete rootProject.buildDir
   }
   

     
3. Open build.gradle(app).
4. Add a dependancy (<project>/<app-module>/build.gradle)-
•  compile 'com.google.firebase:firebase-messaging:9.0.0'
5. Add a plugin in the bottom of build.gradle(<project>/<app-module>/build.gradle)-
•  apply plugin: 'com.google.gms.google-services' . 
6. After adding dependency and plugin your app level build.gradle will be look like this- 
   

   apply plugin: 'com.android.application'
   android {
   
       compileSdkVersion 23
       buildToolsVersion "23.0.2"
   
       defaultConfig {
           applicationId "com.firebasedemoproject"
           minSdkVersion 15
           targetSdkVersion 23
           versionCode 1
           versionName "1.0"
           testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
       }
   
       buildTypes {
           release {
               minifyEnabled false
               proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
           }
       }
   }
   
   dependencies {
       compile fileTree(dir: 'libs', include: ['*.jar'])
       androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
           exclude group: 'com.android.support', module: 'support-annotations'
       })
       compile 'com.android.support:appcompat-v7:23.2.1'
       testCompile 'junit:junit:4.12'
   
   /*______________________messaging______________________*/
       compile 'com.google.firebase:firebase-messaging:9.0.0'
     
   }
   
   apply plugin: 'com.google.gms.google-services'
   

     


7. Open manifest.xml and update it-- 
1. Add INTERNET permission 
2. Add service to receive notification.
3. Add service to receive firebase instance ID(Device Token).
   
   
   
   
8. Now your updated manifest.xml will be look like this-
   
   
   

   <?xml version="1.0" encoding="utf-8"?>
   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
       package="com.firebasedemoproject">
    
    <!--add permission-->
   <uses-permission android:name="android.permission.INTERNET" />
      
    <application
           android:name=".MyApplication"
           android:allowBackup="true"
           android:icon="@mipmap/ic_launcher"
           android:label="@string/app_name"
           android:supportsRtl="true"
           android:theme="@style/AppTheme">
   
           <!--activities-->
           <activity android:name=".MainActivity">
               <intent-filter>
                   <action android:name="android.intent.action.MAIN" />
                   <category android:name="android.intent.category.LAUNCHER" />
               </intent-filter>
           </activity>
   
           <!--service-->
   
      <!--service to recive notifications-->
           <service android:name=".fcm_service.MyFirebaseMessagingService">
               <intent-filter>
                   <action android:name="com.google.firebase.MESSAGING_EVENT" />
               </intent-filter>
           </service>
   
        <!--service to create firebase instance ID(Device Token)-->
           <service android:name=".fcm_service.MyFirebaseInstanceIDService">
               <intent-filter>
                   <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
               </intent-filter>
           </service>
       </application>
   </manifest>
   

     
    
9. Now go to the Firebase developer console and create a new project
   
   
   
   
10.  Enter your application name and select your country. then click on create project
11. 
    
    
12.  Now you will see a screen like this
    
13. 
    then click on "add Firebase to your Android app".
14. Now put 
1. Package name  
2. App nickname (optional)
3. Debug signing certificate SHA-1 (optional) 
   
   
4. 
15.  Copy and paste the google-services.json file into the application root directory.
16. 
    
    
    
17. Now create a class named  MyFirebaseInstanceIDService.java and write the following code.
    
    
    

    package com.firebasedemoproject.fcm_service;
    import android.util.Log;
    import com.google.firebase.iid.FirebaseInstanceId;
    import com.google.firebase.iid.FirebaseInstanceIdService;
    
    /**
     * Created by android_studio on 17/11/16.
     */
    
    public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
    
        private static final String TAG = "MyFirebaseIIDService";
    
        @Override
        public void onTokenRefresh() {
            //Getting registration token
            String refreshedToken = FirebaseInstanceId.getInstance().getToken();
            //Displaying token on logcat
            Log.e(TAG, "Refreshed token: " + refreshedToken);
        }
    
        private void sendRegistrationToServer(String token) {
            //You can implement this method to store the token on your server
            //Not required for current project
        }
    }

      
18. Now create MyFirebaseMessagingService.java and write the following code.
    
    
    

    package com.firebasedemoproject.fcm_service;
    import android.app.NotificationManager;
    import android.app.PendingIntent;
    import android.content.Context;
    import android.content.Intent;
    import android.media.RingtoneManager;
    import android.net.Uri;
    import android.support.v4.app.NotificationCompat;
    import android.util.Log;
    import com.firebasedemoproject.MainActivity;
    import com.firebasedemoproject.R;
    import com.google.firebase.messaging.FirebaseMessagingService;
    import com.google.firebase.messaging.RemoteMessage;
    
    /**
     * Created by android_studio on 17/11/16.
     */
    
    public class MyFirebaseMessagingService extends FirebaseMessagingService {
    
        private static final String TAG = "MyFirebaseMsgService";
    
        @Override
        public void onMessageReceived(RemoteMessage remoteMessage) {
    
            //Displaying data in log
            Log.d(TAG, "From: " + remoteMessage.getFrom());
            Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());
    
            //Calling method to generate notification
            sendNotification(remoteMessage.getNotification().getBody());
        }
    
        //This method is only for generating local notification with push notification data(titlenmessage)
        private void sendNotification(String messageBody) {
            Intent intent = new Intent(this, MainActivity.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                    PendingIntent.FLAG_ONE_SHOT);
            Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
            NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setContentTitle("Firebase Push Notification")
                    .setContentText(messageBody)
                    .setAutoCancel(true)
                    .setSound(defaultSoundUri)
                    .setContentIntent(pendingIntent);
            NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.notify(0, notificationBuilder.build());
        }
    }
    

     



19. All the setup has completed and now run the application.
20. Now see the logcat, You will see a token copy this.
    
21.  
    
    
22.  Go to the firebase console, You will see the window like this-
23. 
    
    
24.  Select Notification, You will see the window like this-
25.  
    
    
26.  Click on "Send your first message".
27.  Fill all the entire detail like -Message text, Target, FCM registration token
28. 
29. Click on "send message".
30. This is the notification which is sent from firebase.
31.  
32. You can also check on fire base-
33. 
    
34. Good bye, Thanks to read this blog.