ImageView can probably get you a quick-and-dirty version, but WebView would probably be better. Check out the mapping API from Micello, and this Google I/O talk on indoor mapping using the Google Maps API.
A few other reference apps to look at: PointInside, Aisle411, Meridian.
My startup, BuildingLayer, does some indoor map stuff as well. We use Leaflet out front, which is buttery smooth on iOS's Mobile Safari, but you lose pinch-zoom capabilities in the stock Android browser (looks like this issue is being resolved with Mobile Chrome & Android ICS).
