This example shows how to use the Firebase Cloud Messaging(FCM) platform. FCM is a successor of Google Cloud Messaging(GCM). It does not require C2D_MESSAGE permissions from the app users.
Steps to integrate FCM are as follows.
a. Package name - It can be found from the android manifest XML file.
b. Debug signing SHA-1 certificate - It can be found by running following command in the terminal.keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android
Enter this information in the firebase console and add the app to firebase project. Once you click on add app button, your browser would automatically download a JSON file named “google-services.json”.
a. Add following code line to your project level build.gradle
`dependencies{
classpath 'com.google.gms:google-services:3.1.0' .....`
b. Add following code line at the end of your app level build.gradle.
//following are the dependencies to be added
compile 'com.google.firebase:firebase-messaging:11.0.4'
compile 'com.android.support:multidex:1.0.1'
}
// this line goes to the end of the file
apply plugin: 'com.google.gms.google-services'
c. Android studio would ask you to sync project. Click on Sync now.a. One extending FirebaseMessagingService with intent-filter as following
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT"/>
</intent-filter>
b. One extending FirebaseInstanceIDService.
<intent-filter>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
</intent-filter>import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import com.google.firebase.messaging.FirebaseMessagingService;
public class MyFirebaseMessagingService extends FirebaseMessagingService {
public MyFirebaseMessagingService() {
}
}import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import com.google.firebase.iid.FirebaseInstanceIdService;
public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
public MyFirebaseInstanceIDService() {
}
}String token = FirebaseInstanceId.getInstance().getToken();
Log.d("FCMAPP", "Token is "+token);
Click on Notification in Firebase console and UI will help you to send out your first message. Firebase offers functionality to send messages to single device(By using the device token id we captured) or all the users using our app or to specific group of users. Once you send your first message, your mobile screen should look like following.
