This document discusses how to create Android apps that integrate with Liferay Portal. Liferay Portal is an open source portal and collaboration platform with features like user and group management, websites, content management, and workflows. The Liferay Mobile SDK hides platform-specific implementation details and allows accessing Liferay services through JSON and OAuth. It demonstrates building a mobile SDK module from source that can then be included and used in an Android IDE project to access and use Liferay APIs.