The camera demo shows off the Capture API allowing us to grab a photo to display to the user.
You can learn more about the capture API by checking out the JavaDocs for Capture and the developer guide (pdf).
You can try the native demo on an Android device here and also check out the live in browser version of the demo. The latter uses the Codename One JavaScript port to build the unmodified demo into a web app.
The code within this project is unlicensed and free for use in any way you see fit.