If you want to start development of ownCloud android client you have two way to do so (a) building with console (b) building with eclipse 1. Use setup_env.sh 2a. ant clean;ant debug 2b. Open Eclipse and import actionbarsherlock/library project to your workspace after those space you should be good to go. HAVE FUN! NOTE: You must have 'tools' and 'platforms-tools' in your path in order to run setup_env.sh