Testing Googles Firebase Notifications On Development Device Only

I am working on an android app where I want to be able to use the notification system within Firebase. I want to use the advanced features where I can add key/value pairs so that I

Solution 1:

You should choose single device choice on "send notification" screen.

After that you should get your FCM registration token. Yo can get token via this app. https://play.google.com/store/apps/details?id=com.tune.mytunedevice

Write your token and send notification.

Solution 2:

You could create a new product flavor for your app (e.g. "development") (Configure Build Variants) and create a seperate firebase project (with a seperate google-services.json file) (Add multiple google-services.json files).

Then you have different API keys for each project which don't effect each other.

Solution 3:

You can get the FCM registration ID for those testing devices and send the message just for them, or create a topic/testing and register those devices to that topic then send the message just for this topic.