Just put an Android project under git (beanstalk) version control via the command line (mac terminal). Next step is to set up exclusions.
To those
Here is the one I use in my Android projects, it supports both ADT and Android Studio, so it is good if you are working with a team.
# General Folders
# gradle/ comment this when using gradle wrapper.
build/
bin/
gen/
tmp/
# proguard/ comment if not using proguard.
.gradle/
.settings/
.idea/
# General Files
.project
.classpath
.DS_Store
local.properties
*.iml
# gradlew comment when using gradle wrapper
# gradlew.bat comment when using gradle wrapper
Thumbs.db
# files specific to current project
your_apk.apk