About Topic Messaging

[droidxnd]

I wonder if there's any mail address or anything on your profile to ask the questions, but I couldn't find them. Sorry about asking questions at here.

I had following codes and tried send the push to topic and prompt gave me a message_id, but push is not received on Android App. Is it problem of my android client?

var gcm = require('node-gcm');

var message = new gcm.Message();

message.addData('title', 'This is a Title!'); message.addData('message', 'This is a Description!');

var sender = new gcm.Sender('AIzaS....');

sender.sendNoRetry(message, { topic: '/topics/MyAppName }, function (err, response) { if(err) console.error(err); else console.log(response); });

[eladnava]

Hi @droidxnd, I'm going to ask the obvious -- are you sure you subscribed your test device to/topics/MyAppName?

This is done via the Android client-side code.

 GcmPubSub pubSub = GcmPubSub.getInstance(this);
 pubSub.subscribe(token, "/topics/" + topic, null);

[droidxnd]

Hello @eladnava!!

I already added this code to my App before :

private void subscribeTopics(String token) throws IOException {
    GcmPubSub pubSub = GcmPubSub.getInstance(this);
    for (String topic : TOPICS) {
        pubSub.subscribe(token, "/topics/MyAppName" + topic, null);
    }
}

and added this code to check the type of message (Topic or Token)

    if (from.startsWith("/topics/MyAppName")) {

        Log.d(TAG, "This message is sent from Topic");
        // message received from some topic.
    } else {
        Log.d(TAG, "This is normal GCM Message");
        // normal downstream message.
    }

[eladnava]

@droidxnd According to the code you posted, your app subscribes via:

pubSub.subscribe(token, "/topics/MyAppName" + topic, null)

Which is not the same as:

pubSub.subscribe(token, "/topics/MyAppName", null).

Could it be a mistake?

[droidxnd]

@eladnava Oh my, I'm embarrassed about I missed that. Thanks, sir!

[hypesystem]

Good thing that you asked the question, though, @droidxnd --- and this is indeed the right place for this kind of question :smile:

Please keep us posted if anything else seems to act up. Good luck with your project!