Android/Firebase - Error while parsing timestamp in GCM event - Null timestamp

Question

I'm building an Android app which will receive push notifications. I've got Firebase Cloud Messaging setup and pretty much working, such that I can send the following payload to a valid token and the notification and data are received.

Using url https://fcm.googleapis.com/fcm/send

{
 "to":"<valid-token>",
 "notification":{"body":"BODY TEXT","title":"TITLE TEXT","sound":"default"},
 "data":{"message":"This is some data"}
}

My app receives it correctly and can deal with it.

The only slight wrinkle is that I get the following exception thrown in the debug:

Error while parsing timestamp in GCM event
    java.lang.NumberFormatException: Invalid int: "null"
        at java.lang.Integer.invalidInt(Integer.java:138)
        ...

It doesn't crash the app, it just looks untidy.

I've tried adding a timestamp item to the main payload, the notification, the data, and also tried variations such as time but can't seem to get rid of the exception (and google as I might, I can't find an answer).

How do I pass the timestamp so it stops complaining?

Edited: Here is my onMessageReceived method, but I think the exception is thrown before it gets here

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    Log.d(TAG, "From: " + remoteMessage.getFrom());

    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        Log.d(TAG, "Message data payload: " + remoteMessage.getData());
        //TODO Handle the data
    }

    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
    }
}

Thanks in advance, Chris

Answer 1

Waitting for answers