I've been running a couple of apps using the mapview. Everything was working fine for a while. After running it a couple of times the map doesn't show up. I can zoom in/out move around etc. it also get the lat and lonn coordinates, but the map doesnt show. Ive tried reinstalling the application but still nothing.

Anyone experiencing the same problem or know how to go about this?

Yeah, you need the Google API key. You'll find links/explanations in this forum post:

Map Problems