Firebase Cloud Messaging for Android

Creating an Android Studio Project

• As we do always 😛 create a new android studio project. Once the project is loaded copy the package name you can get it from the AndroidManifest.xml file.

Getting a Configuration File

• Go to firebase console and create a new project.

• Now put your app name and select your country.

• Now click on Add Firebase to Your Android App.

• Now you have to enter your projects package name and click on ADD APP.

• After clicking add app you will get google-services.json file.

Adding Firebase Messaging to Your Project

• Now come back to your android project. Go to app folder and paste google-services.json file.

• Now go to your root level build.gradle file and add the following code.

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// 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:2.1.0'         //Add this line         classpath 'com.google.gms:google-services:3.0.0'     } } allprojects {     repositories {         jcenter()     } } task clean(type: Delete) {     delete rootProject.buildDir }

• Inside app level build.gradle file make the following changes.

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apply plugin: 'com.android.application' android {     compileSdkVersion 23     buildToolsVersion "23.0.3"     defaultConfig {         applicationId "com.firebasecloudmessaging"         minSdkVersion 15         targetSdkVersion 23         versionCode 1         versionName "1.0"     }     buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     } } dependencies {     compile fileTree(dir: 'libs', include: ['*.jar'])     testCompile 'junit:junit:4.12'     compile 'com.android.support:appcompat-v7:23.4.0'     //Add this line     compile 'com.google.firebase:firebase-messaging:9.0.0' } //Add this line apply plugin: 'com.google.gms.google-services'

• Now sync your project.

Implementing Firebase Cloud Messaging

• Create a class named  MyFirebaseInstanceIDService.java and write the following code.

MyFirebaseInstanceIDService.java

Java

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package com.firebasecloudmessaging; import android.util.Log; import com.google.firebase.iid.FirebaseInstanceId; import com.google.firebase.iid.FirebaseInstanceIdService; //Class extending FirebaseInstanceIdService 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.d(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     } }

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

MyFirebaseMessagingService.java

Java

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package com.firebasecloudmessaging; 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.google.firebase.messaging.FirebaseMessagingService; import com.google.firebase.messaging.RemoteMessage; public class MyFirebaseMessagingService extends FirebaseMessagingService {     private static final String TAG = "MyFirebaseMsgService";     @Override     public void onMessageReceived(RemoteMessage remoteMessage) {         //Displaying data in log         //It is optional         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 generating push notification     //It is same as we did in earlier posts     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());     } }

• Now we have to define the above services in our AndroidManifest.xml file. So go to manifest and modify as follows.

AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="net.simplifiedcoding.firebasecloudmessaging">     <!-- Adding Internet Permission -->          <uses-permission android:name="android.permission.INTERNET"/>     <application         android:allowBackup="true"         android:icon="@mipmap/ic_launcher"         android:label="@string/app_name"         android:supportsRtl="true"         android:theme="@style/AppTheme">         <activity android:name=".MainActivity">             <intent-filter>                 <action android:name="android.intent.action.MAIN" />                 <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>         </activity>         <!--             Defining Services         -->         <service             android:name=".MyFirebaseMessagingService">             <intent-filter>                 <action android:name="com.google.firebase.MESSAGING_EVENT"/>             </intent-filter>         </service>         <service             android:name=".MyFirebaseInstanceIDService">             <intent-filter>                 <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>             </intent-filter>         </service>     </application> </manifest>

• Thats all. Now run your app (Make sure your device is having google play service or else it won’t work).
• After running you will see the token in the logcat. Copy the token.

Sending Push Notification using Firebase Console

• Go to firebase console and select the app you created.
• From the left menu select notification.
• Click on new message.
• Enter message, select single device and paste the token you copied and click on send. The same as I did on the video, and check your device

Firebase Cloud Messaging Tutorial

• Bingo! It is working absolutely fine. If you are having trouble then you can get my source code from the link given below.
• I hope you all like it if any Queries please comment it below.