Groovy support is provided by groovy-android-gradle-plugin.
Build / install / start from command line:
➜ AndroidJavaAlternatives ./gradlew :app-groovy:assembleDebug
...
➜ AndroidJavaAlternatives adb -e install -r ./app-groovy/build/outputs/apk/app-groovy-debug.apk
1295 KB/s (2672448 bytes in 2.014s)
pkg: /data/local/tmp/app-groovy-debug.apk
Success
➜ AndroidJavaAlternatives adb -e shell am start -n app.groovy/app.groovy.Home
Starting: Intent { cmp=app.groovy/.Home }
Debug apk size: 2.6MB.
Notes:
- Android run configuration can't find default Activity. Alternative: select "Do not lauch Activity" and start manually the app.
- Android Studio poor support for groovy (no autocomplete when overriding super methods)