Please try to keep things in good shape and comply to what's there.
This project follows Android best practices so please have a look if you've never heard of them.
The code is formatted according to Android Studio's standard, with the exception of indent being tabs instead of spaces.
Use the feature branch workflow to add new features and make sure to squash when merging into master:
$ git merge cool_feature --squash
Then write a good commit message to keep the history meaningful and useful. One feature, one commit.