Google Maps V2 shows blank screen on android 2.2

Question

I tried following a tutorial on Android Maps V2 Quick Start But when I run the app, a blank map screen is shown. My phone uses android 2.2.1.

Answer 1

I was mucking around with this stuff for ages as well (certificates, package names, API console etc.) and nothing worked until I tried uninstalling the app from my device, then re-installing it and suddenly it was fine.