KML

You know what KML is already, right?

It's XML containing spatial data that includes visual properties, so your app can tell how to render it.

KML for Android

I need to be able to fetch a KML from GeoServer and render its contents as a marker layer in Android.

A C++ library with bindings won't cut it, I need a pure Java approach. This looks promising.

http://code.google.com/p/javaapiforkml/