How to pass data from Unity Scene to Android Activity

Hello I am currently writing an Android app that uses Unity to display a 3D model. The user is capable of interacting with the model as selecting objects in the scene. What I am having trouble is passing data back to the Android activity.

I currently have the Unity scene executing as a subview, can anyone point me in the direction on how to pass data from the scene to Android?

Do I have to create a Java plugin, explained here? link text

If this is the case, does anyone have any tutorials on this? The original material is kind of lacking. Thanks in advance.