The following code will help get the topics a firebase token is subscribed to.
It will send a request to Firebase and ask for the reply. The reply is in a JSON file.
Add the following code to your project, Add your Firebase project Key and Add the token, then call RequestTopics.
This was my first test-App for Firebase Push Notifications and it is a easy way to chat over different topics/groups. The APK file was too big for uploading. You can download it here.
Just open a new topic and share it with your friends. If questions or ideas, lets open this topic ;-)...