The source code for a small piece of software using this library is available for download here. After downloading and saving the achartengine-0.*.0-demo.zip to your local machine, you can import the demo as an Eclipse project by following these steps:

• in Eclipse, select File / Import...
• in the Import dialog, select General / Existing Projects into Workspace and hit "Next"
• select the "Select archive file" radio button and hit "Browse..."
• navigate to the achartengine-0.*.0-demo.zip file, select it and hit "Open"
• in the Import dialog hit "Finish"

A new project, called AChartEngineDemo will be created into your workspace. Notice that you need to have the Android Development Tools (ADT) plugin installed.
The above steps have been tested using Eclipse 3.5 and ADT 0.9.7.