FirebaseMessaging

A simple android firebase notification example

Notification :

Download APK :

https://github.com/datanapps/GoogleExoPlayerSample/blob/master/screens/app-debug.apk

Setup project on firebase :

https://console.firebase.google.com

Android Dependency :

        Project Lable : 
        // Top-level build file where you can add configuration options common to all sub-projects/modules.
        buildscript {
            repositories {
                google()
            }
         dependencies {
              classpath 'com.google.gms:google-services:4.3.2'
           }
        }
        allprojects {
            repositories {
                google()
            }
        }
        task clean(type: Delete) {
            delete rootProject.buildDir
        }

Application Dependency :

// add firebase message

implementation 'com.google.firebase:firebase-messaging:20.0.0'

Manifest File :

         <service
                    android:name=".fcm.MyFirebaseMessagingService"
                    android:exported="false">
                    <intent-filter>
                        <action android:name="com.google.firebase.MESSAGING_EVENT" />
                    </intent-filter>
                </service>

Messaging Service :

 public class MyFirebaseMessagingService  extends FirebaseMessagingService {

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);
    Log.d("FCM", remoteMessage.toString());
}
}

Create Token :

FirebaseInstanceId.getInstance().getInstanceId()
            .addOnCompleteListener(new OnCompleteListener<InstanceIdResult>() {
                @Override
                public void onComplete(@NonNull Task<InstanceIdResult> task) {
                    if (!task.isSuccessful()) {
                        Log.w(TAG, "getInstanceId failed", task.getException());
                        return;
                    }

                    // Get new Instance ID token
                    String token = task.getResult().getToken();

                    // Log and toast

                    Log.d(TAG, token);
                    Toast.makeText(MainActivity.this, token, Toast.LENGTH_SHORT).show();
                }
            });

Read More :

https://firebase.google.com/docs/cloud-messaging/android/client

Firebase Console :

https://console.firebase.google.com

Hope it will work for you. Thank you.