“Unable to get system library for project” after I upgraded to Android SDK 2.3 and ADT 8.0

Question

Today I upgraded to Android SDK 2.3 and I also upgraded the Eclipse Plugin Androi Developer Tools 8.0 (from 0.9.9). I also upgraded my Java Development Kit to 1.6_22.

No

Answer 1

Another possible explanation is that Eclipse has forgotten its Android plugin. This can happen if you switch workspaces, as happened in my case. I tried to re-import an existing Android project, and it couldn't find the basic java system libraries, since it was pointing to the standard android jars. Reinstalling the android plugin (Help->Eclipse Marketplace, then search for "Android" and pick "Android Development Tools for Eclipse") fixes it.