I am using GraphView in my android APP and including the package into my project works pretty fine. But, there is something missing because the eclipse isn’t resolving android.view.ScaleGestureDetector.
There goes a printscreen http://www.mediafire.com/i/?sc8j7r341u126ak
Sorry for this late answer, but I just solved this problem on my project.
In fact, the solution was written on a little warning, just below all the errors :
Attribute minSdkVersion (8) is higher than the project target API level (7)
I had to change in Project > Properties > Android and select Google APIs Level 8 instead of Level 7.
A build later, all my errors were gone. Hope this answer will help someone.