* Some errors were removed after selecting the correct SDK from
Properties > Android > Project Build Target
* Some errors were removed after clean and rebuild.
But still there were 600+ error with message:
"The method X or type Y must override a superclass method."
The solution was to set the Compiler level from 1.5 to 1.6.
Properties > Java Compiler > JDK Compliance level to 1.6
solves the problem.
You may need to"delete" the projects from the workspace and then import them again. You may need to do that more than once.