After a week of frustration, with Eclipse crashing six ways from Sunday whether Helios or Galileo, I reached the conclusion that you cannot install Android for use in Eclipse JEE, my usual mode. Instead, use the plain Java Eclipse. My definitive (and separate!) installation became Eclipse Galileo SR2 IDE for Java Developers. I added these lines to eclipse.ini, though I probably did not have to be so generous:
In order to distinguish this version of Eclipse from my usual JEE development version on my task bar, I found an icon to graft onto it at Free Large Android Icons and selected one that looked most like the green Android icon.
Code:
-vmargs
-Xms256m
-Xmx1024m
-XX:PermSize=128m
-XX:MaxPermSize=512m