Description : Launch eclipse ide andstucked, “Android SDK Content Loader (0%)” show at of left-bottom dialog
 
Root Cause : Unknow
 
Solution :

cd workspace/.metadata/.plugins/org.eclipse.core.resources/.projects
rm -rf *

ps : Projects won’t be lost but Some projects will confuse need to rebuild
 
Note :
Solution1. Remove ~/.android/cache and ~/.android/ddms.cfg not worked for me !!!
Solution2. Eclipse -> Project -> Build Automatically -> uncheck this option -> restart eclipse fail !!!