Java – Use Java gcm-server to send messages to topics

I’m using Java gcm-server to send messages to Android client applications, and I want to send messages to a specific topic, as shown in the image here .

My problem is that I can only send messages to registration_ids list using the Sender class, and I don’t know how to use the parameter “to”: “/topics/myTopic” (I read the source code and it doesn’t seem to be implemented).

Any suggestions?

Yes, now… Not implemented yet,

You need to make an HTTP POST request to the following address:

https://android.googleapis.com/gcm/send

body

{
“Data”:
{
“title”: “test title”,
“message”: “Your message”
},

“

to”: “/topics/global”

More Help –
https://github.com/googlesamples/google-services/blob/master/android/gcm/gcmsender/src/main/java/gcm/play/android/samples/com/gcmsender/GcmSender.java