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
The best way here as I tried before, is to create a new project and choose :
create a project from an existing source and choose the location of the android project that you want to import, then next, you will see the build target of android like : 2.3.3 or 2.1 ..
Just choose one of them then finish!
You are done! ..