How to open existing project in Eclipse

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.

It's the "Import existing project into workspace" option under Import->General.

See: http://help.eclipse.org/helios/index.jsp?topic=%2Forg.eclipse.platform.doc.user%2Ftasks%2Ftasks-importproject.htm

Window->Show View->Navigator, should pop up the navigator panel on the left hand side, showing the projects list.

It's probably already open in the workspace, but you may have closed the navigator panel, so it looks like you don't have the project open.

Eclipse using ADT Build v22.0.0-675183 on Linux.