Google recently launched firebase analytics for iOS and android, which is great and I want to use it in my android game made in unity3d 5.4b19. I tried to build a plugin for
You need to add this files to the plugin/android folder: http://joxi.ru/Q2KeQD7C3zdYrj . after that your sdk will work fine.
P.S. I dont understand why log event doesn't work, maybe need to wait. I think, google json file will setting the app, but package name of sdk module and unity app package name need to equal