GoogleMapExamples is a project mainly written in Java, it's free.
Show how to use external map commands and MapView (only basics)
This project was done for a presentation at the Japanandroid Meetup on the 26th July 2011 in Tokyo, Japan.
The presentation can be found in the file Presentation.pdf
The map will probably not show the map images. To enable that you will have to use your own Google Maps API key. Look at the presentation to see how to do it.