After downloading packed file, unzip it.
Open Eclipse, click File -> Import… Under Android folder, choose Existing Android Code Into Workspace and click Next. Browse for unzipped folder and choose android folder. Import Cropper first. Click OK, then click Finish. When you imported Cropper, repeat steps, and then import Wallpaper. Click OK, then click Finish. Before clicking Finish, you may rename project name by clicking MainActivity under New Project Name tab. When you imported Wallpaper, repeat steps, and then import “google-play-services_lib”. Click OK, then click Finish.
If you have a problem with import “google-play-services_lib”, then right click on Wallpaper->Properties->Android->(Library)Add->”google-play-services_lib”