Q:

Android -File google-services.json is missing.  The Google Services Plugin cannot function without it

I'm trying to connect my app to Firebase, but it keeps saying google-services.json is missing, even though I've added it to the right place.  Actually, the last time I tried this (on a different app), it worked, but this time it doesn't.  I read a lot of articles but my problem still persists.  Any help? 
Thanks! 

A:

You have to download the config file for your Android app from Firebase Project settings. 
Please refer to this link for steps of Getting a config file for your Android app
Note that the file should be used as follows:

Copy the file into the app/ folder of your Android Studio project, or
  into the app/src/{build_type} folder if you are using multiple build
  types.