Firebase cloud messaging notification not received by device

Question

I am having an issue with FireBase Cloud Messaging in which I get the Token from the device and send the notification test through the Google Firebase notification console h

Answer 1

I had a similar problem, but in my case I was missing the google-services plugin from my Gradle build (I was adding Firebase to an existing project).

I added the following to my root build.gradle:

classpath 'com.google.gms:google-services:3.1.0'

and the following to the end of my app-level build.gradle:

apply plugin: 'com.google.gms.google-services'

I then had to download the google-services.json file from the Firebase Console (having originally imported an existing Google Cloud project) and copy it to my app directory`.