PubNub 推送通知在 Android 上发送不正确的数据

Question

Let me go straight to the point, with Firebase Cloud Messaging and Android Oreo there have been some major changes when it comes to using their APIs.

I have entered my Firebase Server Api Key in the PubNub Console, push notification works absolutely fine on the Firebase console, but when publishing notification with PubNub, remoteMessage.toString gives => com.google.firebase.messaging.RemoteMessage@ffe9xxx in the OnMessageReceived function.

I am publishing something like this

JsonObject payload = new JsonObject();

        JsonObject androidData = new JsonObject();
        androidData.addProperty("contentText","test content");
        androidData.addProperty("contentTitle","Title");

        JsonObject notification = new JsonObject();
        notification.add("notification",androidData);


        JsonObject data = new JsonObject();
        data.add("data", notification);
        payload.add("pn_gcm", data);

in

PubNubObject.publish()
            .message(payload)
             etc..

Any idea why is this happening? Thank you in advance.

Code on the receiving end

There is a class which extends FirebaseMessagingService, codes for OnMessageReceived function:

if (remoteMessage.getNotification() != null) {
    //for testing firebase notification
    Log.d(TAG, "Message Notification 
    Body:"+remoteMessage.getNotification().getBody());  
 } else {
    //for anything else, I wanted to see what was coming from the server
    //this is where I am getting the message when using PubNub notification
    Log.d(TAG, "onMessageReceived: remoteMessage to 
    str:"+remoteMessage.toString() );
 }

Answer 1

Android getData vs getNotification API

You are nesting the notification key/value inside of the data key and just need to use the API, remoteMessage.getData() instead of remoteMessage.getNotification() .

If notification key was at the top level, it would work. See Android docs here .

Instead of this:

{
 "pn_gcm": {
  "data": {
   "notification": {
    "contentText": "test content",
    "contentTitle": "Title"
   }
  }
 }
}

This if switing to remoteMessage.getData() :

{
 "pn_gcm": {
  "data": {
    "contentText": "test content",
    "contentTitle": "Title"
  }
 }
}

Or this if sticking with remoteMessage.getNotification() :

{
 "pn_gcm": {
  "notification": {
    "contentText": "test content",
    "contentTitle": "Title"
   }
  }
 }
}

PubNub basically just looks for the pn_gcm in the message payload when it is published and grabs whatever is inside of it and passes that directly to Google's FCM service for the devices that are registered (with PubNub) for that channel to receive GCM (FCM).

If the data is not formatted properly we would receive an error back from FCM which should be reported on the channel's -pndebug channel (assuming pn_debug:true was included in the published message payload).

For full details on troubleshooting FCM (GCM) or APONS issues with PubNub, please review How can I troubleshoot my push notification issues?