IntelliJ IDEA creates a project for the entire code base you work with, and a module for each of its individual components. So, IntelliJ IDEA module is more like an Eclipse project, and project is roughly similar to Eclipse workspace. There's no exact equivalent to Eclipse's workspace that contains all your work, but you can open multiple projects in multiple frames at the same time.
This table can help you see how Eclipse and IntelliJ IDEA concepts map to each other:
Eclipse IDEA
Workspace Project
Project Module
Project-specific JRE Module JDK
User library Global library
Classpath variable Path variable
Project dependency Module dependency
Library Module library
To use the library add it as a dependancy:
File > Project Structure > Modules > Dependencies
Then add the module (android library) as a module dependency.
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