I kind of feel stupid, but I just can\'t get it to work....
I have an existing Android project copied from my other pc, in the folder
c:\\projects\\t
Try File > New > Project... > Android Project From Existing Code. Don't copy your project from pc into workspace, copy it elsewhere and let the eclipse copy it into workspace by menu commands above and checking copy in existing workspace.
File
New
Project...
Android Project From Existing Code
copy in existing workspace