If you want to start development of ownCloud android client you have two way to do so: 1. Building with console: - Use setup_env.sh or setup_env.bat - NOTE: You must have git, ant/bin, android/tools in your enviroment path 2. Building with eclipse: - Run ant clean debug - Open Eclipse and import *actionbarsherlock/library* project to your workspace - NOTE: You must have 'tools' and 'platforms-tools' in your path in order to run setup_env.sh After those actions you should be good to go. HAVE FUN!