tosinonikute

FirebaseMessaging.getInstance().subscribeToTopic("news");

tosinonikute

public class FirebaseIDService extends FirebaseInstanceIdService {
    private static final String TAG = "FirebaseIDService";

    @Override
    public void onTokenRefresh() {
        // Get updated InstanceID token.
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
        Log.d(TAG, "Refreshed token: " + refreshedToken);

        // TODO: Implement this method to send any registration to your app's servers.

tosinonikute

FirebaseInstanceId.getInstance().getToken();

tosinonikute

public class MyFirebaseMessagingService extends FirebaseMessagingService {
    private static final String TAG = "FCM Service";

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
    
       Log.d(TAG, "From: " + remoteMessage.getData().size()); // for the data size
       final Map<String, String> data = remoteMessage.getData();
       String title = data.get("title");
       String body = data.get("body");

tosinonikute

    Log.d(TAG, "From: " + remoteMessage.getFrom());
    Log.d(TAG, "From: " + remoteMessage.getNotification().getBody());
    
    

tosinonikute

        <service android:name=".FirebaseIDService">
            <intent-filter>
                <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
            </intent-filter>
        </service>

tosinonikute

public class FirebaseIDService extends FirebaseInstanceIdService {
        private static final String TAG = "FirebaseIDService";

        @Override
        public void onTokenRefresh() {
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
            Log.d(TAG, "Refreshed token: " + refreshedToken);

            // TODO: Implement this method to send any registration to your app's servers.
            sendRegistrationToServer(refreshedToken);

tosinonikute

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

tosinonikute

public class MyFirebaseMessagingService extends FirebaseMessagingService {
    private static final String TAG = "FCM Service";
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
    Log.d(TAG, "From: " + remoteMessage.getFrom());
    Log.d(TAG, "From: " + remoteMessage.getNotification().getBody());
    }
} 

tosinonikute

defaultConfig {
        applicationId "com.example.myfirebaseapp" //add your application Id
        minSdkVersion ...
        targetSdkVersion ...
    }