How To Create Topic in FCM Notifications

Question

I\'m trying Firebase-Notification API the service is worked perfect when i send downstream message from console to app, but how to send message to topic registered users ? <

Answer 1

You can create a topic with http api:

https://iid.googleapis.com/iid/v1/IID_TOKEN/rel/topics/TOPIC_NAME

1. IID_TOKEN = Device registration token, you can find it with following command on your android device :

String IID_TOKEN = FirebaseInstanceId.getInstance().getToken();

2.TOPIC_NAME = new a topic name

3.Authorization: key=YOUR_API_KEY. Set this parameter in the header. Look to screenshot: Creating new topic via Advanced rest client

YOUR_API_KEY: console.firebase.google.com

and send request and you will be receive http status "OK".

Then you can get infos about all your topics in your current project with following api :

https://iid.googleapis.com/iid/info/IID_TOKEN?details=true

here need add Authorization key to header of request and you will be receive your topics list: response info topics

I recommend read this article about Instance ID/Server by Google