From SDK Manager
I have download the google play services, but when I try to add this lib to my project from right click
then import
t
Seems to be you have already imported the google-play-services_lib project and just deleted from eclipse ide but not in your hard drive workspace folder. Try deleting the google-play-services_lib project from your workspace folder and try importing the project again.
And make sure "Is Library" is checked in properties->Android of google-play-services_lib project.