Missing api_key/current key with Google Services 3.0.0

Question

Since I upgraded the project with the latest version of google services and libraries (9.0.0), I have this strange issue :

Grade console :

:         


        

Answer 1

regenerate google-services.json at https://developers.google.com/cloud-messaging/android/client#get-config,one important thing is that you must enable Cloud Messaging in "Choose services" step ,open the new google-services.json file you will see words like

    "api_key": [
     {
       "current_key": "xxxxxxxxxxx"
     }"

without this words or without value of current_key is not the right file