Push Messaging

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Before continuing, please ensure that you've added the Flutter SDK to your app.

For Android

Push Notifications are messages that pop up on mobile devices. App publishers can send them at any time; even if the recipients aren’t currently engaging with the app or using their devices.

Integrating WebEngage with your Flutter Android App (FCM not integrated)

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These steps are for clients who have not yet integrated FCM with their Flutter App. If FCM is already integrated with your app kindly check this section for integration steps.

You can start sending Push Notifications to your Android users via WebEngage by configuring Firebase Cloud Messaging (FCM).

Here's how you can enable Push Messaging for your Android app via the WebEngage Flutter SDK.

Step 1: Add Firebase to Your Project by following the necessary steps in FCM Docs

Step 2: Add the below dependencies in the app-level build.gradle file.

implementation platform('com.google.firebase:firebase-bom:25.12.0')
    implementation 'com.google.firebase:firebase-analytics'
    implementation 'com.google.firebase:firebase-messaging:20.2.1'
    implementation 'com.google.android.gms:play-services-ads:15.0.1'

Step 3: Add the following to your dependencies section in project/build.gradle file.

classpath 'com.google.gms:google-services:4.3.4'

Step 4: Pass Firebase tokens to WebEngage using FirebaseMessagingService.

import com.google.firebase.messaging.FirebaseMessagingService;
import com.webengage.sdk.android.WebEngage;

public class MyFirebaseMessagingService extends FirebaseMessagingService {
    @Override
    public void onNewToken(String s) {
        super.onNewToken(s);
        WebEngage.get().setRegistrationID(s);
    }
}
import com.google.firebase.messaging.FirebaseMessagingService;
import com.webengage.sdk.android.WebEngage;

class MyFirebaseMessagingService : FirebaseMessagingService() {
   override fun onNewToken(s: String) {
       super.onNewToken(s)
       WebEngage.get().setRegistrationID(s)
    }
    
}

Highly Recommended! Passing Firebase tokens to WebEngage from the onCreate method of your Application class ensures that changes in the user’s Firebase token are communicated to WebEngage. Here's how you can execute this.

import com.google.android.gms.tasks.Task;
import com.google.firebase.messaging.FirebaseMessaging;
import com.google.android.gms.tasks.OnCompleteListener;
import androidx.annotation.NonNull;
import com.webengage.sdk.android.WebEngage;

public class MainApplication extends FlutterApplication {
    @Override
    public void onCreate() {
        super.onCreate();
    
  FirebaseMessaging.getInstance().getToken()
    .addOnCompleteListener(new OnCompleteListener<String>() {
        @Override
        public void onComplete(@NonNull Task<String> task) {
          if (!task.isSuccessful()) {
            Log.w(TAG, "Fetching FCM registration token failed", task.getException());
            return;
          }
          // Get new FCM registration token
          String token = task.getResult();
          WebEngage.get().setRegistrationID(token);
        }
    });
    }
}
import com.google.android.gms.tasks.Task;
import com.google.firebase.messaging.FirebaseMessaging;
import com.google.android.gms.tasks.OnCompleteListener;
import androidx.annotation.NonNull;
import com.webengage.sdk.android.WebEngage;

class MainApplication : FlutterApplication() {
    fun onCreate() {
        super.onCreate()
        FirebaseMessaging.getInstance().token
            .addOnCompleteListener(OnCompleteListener { task ->
                if (!task.isSuccessful) {
                    [email protected]
                }
                // Get new FCM registration token
                val token: String = task.getResult()
                WebEngage.get().setRegistrationID(token)
            })
    }
}

Step 5: Pass messages to WebEngage.

Create a class that extends FirebaseMessagingService and pass messages to WebEngage.
As shown below, all incoming messages from WebEngage will contain a key source with webengage as the corresponding value.

package your.application.package;

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import com.webengage.sdk.android.WebEngage;

public class MyFirebaseMessagingService extends FirebaseMessagingService {
  @Override
  public void onMessageReceived(RemoteMessage remoteMessage) {
    Map<String, String> data = remoteMessage.getData();
    if(data != null) {
      if(data.containsKey("source") && "webengage".equals(data.get("source"))) {
        WebEngage.get().receive(data);
      }
    }
  }
}
package your.application.package;

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import com.webengage.sdk.android.WebEngage;

public class MyFirebaseMessagingService extends FirebaseMessagingService {

   override fun onMessageReceived(remoteMessage: RemoteMessage) {
        val data = remoteMessage.data
        if (data != null) {
            if (data.containsKey("source") && "webengage" == data["source"]) {
                WebEngage.get().receive(data)
            }
        }
    }
}

Step 6: Register the service to the application element of your AndroidManifest.xml file as shown below.

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

Step 7. Add your Firebase Credentials to WebEngage

Once all the above steps are completed, you can start sending Push notification!

Integrating WebEngage with your Flutter Android App (FCM integrated)

Step 1: Pass Firebase tokens to WebEngage using FirebaseMessagingService.

import com.webengage.sdk.android.WebEngage;
import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingService;

public class MyFirebaseMessagingService extends FlutterFirebaseMessagingService {
    @Override
    public void onNewToken(String s) {
        super.onNewToken(s);
        WebEngage.get().setRegistrationID(s);
    }
}
import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingService;
import com.webengage.sdk.android.WebEngage;

class MyFirebaseMessagingService : FlutterFirebaseMessagingService() {
   override fun onNewToken(s: String) {
       super.onNewToken(s)
       WebEngage.get().setRegistrationID(s)
    }
    
}

Highly Recommended! Passing Firebase tokens to WebEngage from the onCreate method of your Application class ensures that changes in the user’s Firebase token are communicated to WebEngage. Here's how you can execute this.

import com.google.android.gms.tasks.Task;
import com.google.firebase.messaging.FirebaseMessaging;
import com.google.android.gms.tasks.OnCompleteListener;
import androidx.annotation.NonNull;
import com.webengage.sdk.android.WebEngage;

public class MainApplication extends FlutterApplication {
    @Override
    public void onCreate() {
        super.onCreate();
    
  FirebaseMessaging.getInstance().getToken()
    .addOnCompleteListener(new OnCompleteListener<String>() {
        @Override
        public void onComplete(@NonNull Task<String> task) {
          if (!task.isSuccessful()) {
            Log.w(TAG, "Fetching FCM registration token failed", task.getException());
            return;
          }
          // Get new FCM registration token
          String token = task.getResult();
          WebEngage.get().setRegistrationID(token);
        }
    });
    }
}
import com.google.android.gms.tasks.Task;
import com.google.firebase.messaging.FirebaseMessaging;
import com.google.android.gms.tasks.OnCompleteListener;
import androidx.annotation.NonNull;
import com.webengage.sdk.android.WebEngage;

class MainApplication : FlutterApplication() {
    fun onCreate() {
        super.onCreate()
        FirebaseMessaging.getInstance().token
            .addOnCompleteListener(OnCompleteListener { task ->
                if (!task.isSuccessful) {
                    [email protected]
                }
                // Get new FCM registration token
                val token: String = task.getResult()
                WebEngage.get().setRegistrationID(token)
            })
    }
}

Step 2. Pass messages to WebEngage while using Flutter Firebase Messaging plugin.

Create a class that extends FlutterFirebaseMessagingService and pass messages to WebEngage.

import com.google.firebase.messaging.RemoteMessage;
import com.webengage.sdk.android.WebEngage;

import java.util.Map;

import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingService;

public class MyFirebaseMessagingService extends FlutterFirebaseMessagingService {
    public void onMessageReceived(RemoteMessage remoteMessage) {
        super.onMessageReceived(remoteMessage);
        Map<String, String> data = remoteMessage.getData();
        if(data != null) {
            if(data.containsKey("source") && "webengage".equals(data.get("source"))) {
                WebEngage.get().receive(data);
            }
        }
    }

    public void onNewToken(String s) {
        super.onNewToken(s);
        WebEngage.get().setRegistrationID(s);
    }
}
import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import com.webengage.sdk.android.WebEngage;

public class MyFirebaseMessagingService extends FlutterFirebaseMessagingService {

   override fun onMessageReceived(remoteMessage: RemoteMessage) {
        val data = remoteMessage.data
        if (data != null) {
            if (data.containsKey("source") && "webengage" == data["source"]) {
                WebEngage.get().receive(data)
            }
        }
    }
}

Step 3. Add your Firebase Credentials to WebEngage

Once all the above steps are completed, you can start sending Push notification!

Making your Flutter app compatible with Android 13 push changes

From Android 13 onwards, clients will have to explicitly ask permissions from end user to send push notifications. This means, client will NOT recieve push opted in as true once the app is installed by the end user, unless the user explicitly subscribes for same.

To make sure your app is compatible with Android 13 changes, kindly follow these steps:

Step 1. Kindly refer to official Google documentation to make your application compatible with the same.

Step 2. On the basis of the permission provided by the user, pass the status to WebEngage by following the code snippet below

WebEngagePlugin.setUserDevicePushOptIn(true);

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Note

  • Pass the boolean value true or false depending on the permission the user has specified. If users denies the permission, they will not receive push alerts.

  • Push permission Prompt trigger to be managed by the App.

👍

And you're good to go!

For iOS

Follow our native iOS Push Messaging Guide to configure Push Messaging for your iOS Flutter app.

Please feel free to drop in a few lines at [email protected] in case you have any queries or feedback. We're always just an email away!


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