I am working at a commercial android application. I am also using some libraries licensed under different license types some of them stating the following:
If th
I faced the same issue with my application. You need to make sure you have not added any libraries twice. If you have followed the firebase documentation https://firebase.google.com/docs/android/setup
Then you should not add firebase library inside android studio i.e. file->project structure->cloud->firebase
You have to do only one of the both, to use firebase in your android application.
At the end clean and rerun your app.