Android : Using google analytics as a system wide logger library

I am searching for a system wide solution for application logging and tracking. I found several good ones but I like google analytics the most. I tried to create an android lib (SystemLogger) which one can add to his application and by that a lot of logging operations will take place automatically. But that does not seems to work, I keep getting "NoClassDefFoundError" exception whenever using the lib. It seems like the lib is not built to be placed and used as a lib project, but only used in the application level (except from the exception other stuff suggest this as well, for example user must have some code inserted to his manifest. I want the logging lib to be transparent to the user as much as possible, unless he explicitly would like to log.

I am using Google analytics V4.

Any suggestions, maybe a different logging/framework approach?