GCM - pubSub.subscribe not working

Question

I'm using GCM in my android client and I already can push notification from my App server to Android client.

But I cannot subscribe for a topic I use pubSub.subscribe method and pass registration token and custom topic name in the format of "/topics/mytopic". Here are the thing I'm done so far:

• I wrap the method inside try and catch and it doesn't throw any exceptions.
• I have debugged HTTP via Fiddler but when it does not send any request.
• I try get information of token id via https://iid.googleapis.com/iid/info/IID_TOKEN but it doesn't return any subscribed topics for the client.

here the publish code in android intent service:

GcmPubSub pubSub = GcmPubSub.getInstance(this);
try
{
    pubSub.subscribe(token, "/topics/mytopic",null);
} catch (IOException e)
{
    e.printStackTrace();
}

Answer 1

You are using the Main Thread,you should use another thread Try adding your subscribe code to AsyncTask or IntentService

Answer 2

I am not sure if you have seen this example IntentService which shows how to subscribe to topics. Please check it out and see how far you get - it sounds like something you are trying to do. Check specifically the way the token string gets created which is then used in the subscription:

 InstanceID instanceID = InstanceID.getInstance(this);
 String token = instanceID.getToken(SENDER_ID,GoogleCloudMessaging.INSTANCE_ID_SCOPE, null);

According to the solution to a token issue here, obtaining the token has to be via using InstanceID - otherwise you get issues with topic subscriptions.