Firebase onMessageReceived() returns no getNotification

Question

Calling remoteMessage.getNotification() returns null and when calling remoteMessage.getData() I get a strange object back that has an initial property _wp={ as listed below. I need to extract the alert property each time but I am not sure how.

public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);
    
    RemoteMessage.Notification notification = remoteMessage.getNotification();
    Map<String, String> data = remoteMessage.getData();

    Log.d("DATA", remoteMessage.getData().toString());
    sendNotification(data);
}

The remote data log returns the below. So I can't seem get the title and text I need to in order to construct my notification.

{_wp={"c":"01euntvtna3epk83","alert":{"text":"Body text","title":"test"},"receipt":false,"type":"simple","targetUrl":"wonderpush:\/\/notificationOpen\/default","n":"01eunu08bjla8303","reporting":{"campaignId":"01euntvtna3epk83","notificationId":"01eunu08bjla8303"},"receiptUsingMeasurements":true}, alert=Body text}

I basically want to use them with when using the NotificationCompat.Builder

.setContentTitle(title)
.setContentText(text)

Any help will be greatly appreciated.

Answer 1

It is normal that remoteMessage.getNotification() returns null as WonderPush only uses FCM notifications with data inside them, nothing in the Firebase's own format.

remoteMessage.getData() returns you with a map that can only store String values. This corresponds to the top-level JSON payload. This map's fields are the top-level JSON object fields, and its values are all stringified. So you'll have to parse the _wp key using new JSONObject(remoteMessage.getData().get("_wp")). You'll basically read the title and text fields of this parsed _wp JSON object to feed .setContentTitle() and .setContentText() of the NotificationCompat.Builder.

But you should note that the WonderPush Android SDK is precisely here for that purpose:

• Here is the code that parses the notification's _wp.alert field: https://github.com/wonderpush/wonderpush-android-sdk/blob/v4.0.2/sdk/src/main/java/com/wonderpush/sdk/AlertModel.java
• Here is the code that builds the notification: https://github.com/wonderpush/wonderpush-android-sdk/blob/v4.0.2/sdk/src/main/java/com/wonderpush/sdk/NotificationManager.java#L448-L775

If you have an addition, it would make more sense to fork, hack, submit a pull request, and use your fork in the meanwhile.

Best,