Library Project including Google Play services client jar. This can be used by an Android project to use the API's provided by Google Play services. There is technically no source, but the src folder is necessary to ensure that the build system works. The content is actually located in the libs/ directory. USAGE: Make sure you import this Android library project into your IDE and set this project as a dependency. Note that if you use proguard, you will want to include the options from proguard.txt in your configuration.