Android ADT plugin error

I installed the开发者_Go百科 Android SDK. When I try to import the ADT plugin I get this error:

"Cannot complete the install because one or more required items could not be found.
  Software being installed: Android Development Tools 10.0.0.v201102162101-104271 (com.android.ide.eclipse.adt.feature.group 10.0.0.v201102162101-104271)
  Missing requirement: Android Development Tools 10.0.0.v201102162101-104271 (com.android.ide.eclipse.adt.feature.group 10.0.0.v201102162101-104271) requires 'org.eclipse.gef 0.0.0' but it could not be found"

See here. It looks exactly like your issue.

Is this the first time running the application? If know you may need to uninstall the app from the emulator or device. I ran into this issue before I just made sure the the old app was no longer on the device I was using.

Also if that doesn't work provde and little bit more info so we can help. Perhaps open up the DDMS perspective and seletct the emulator you are using. DDMS is a very helpful tool to determine what is going on.