Android
Android code is based on the rosjava client and core libraries and is prepared to work seamlessly with Android Studio and the Google supported Android Gradle plug-ins.
Official source code for android projects can be found on github in the rosjava organisation.
Documentation
Android development is supported via Damon's rosjava implementation.
Overview : Includes many details on the big re-haul done in time of the Indigo release.
Official Packages : list of all official and semi-official packages in the rosjava-android ecosystem.
Android Studio : using Android Studio to compile, hack and deploy your projects.
FAQ : frequently asked questions.