I have updated my SDK
and ADT
to the latest version, I have also update the Eclipse
to Kepler
the latest one after
I had same problem.. I solved by doing the following:
check all xml files and drawable files if there are any CAPITAL LETTERS in file name, if you have then change it to lower case, if you are using selector xml files then check the other files you are linking in those files..all should be lower case.
Go to java files which show error and remove IMPORT R.java file from imports list.
Go to Projects>>Clean.
This should fix the problem. This is how i fixed :)