求高手 为什么会出现这错误?
安装 eclipse android 出现下面的错误:
Cannot complete the install because one or more required items could not be found.
Software being installed: Android Development Tools 0.9.9.v201009221407-60953 (com.android.ide.eclipse.adt.feature.group 0.9.9.v201009221407-60953)
Missing requirement: Android Development Tools 0.9.9.v201009221407-60953 (com.android.ide.eclipse.adt.feature.group 0.9.9.v201009221407-60953) requires 'org.eclipse.gef 0.0.0' but it could not be found。