자답입니다. 컴파일러쪽 문제라는 외국 개발자의 답변을 참고해서 수정했더니 문제 없이 되네요.
You will get this error if you are using Java 5. Java 5 has a few problems with the @Override
annotation.
You need to make sure you jave Java 6 installed, and then you can change the version used for building by going to Project -> Properties -> Java Compiler
and checking the Enable project specific settings
box and changing the Compiler compliance level:
value to 1.6
Android Tools don't play nice with Java 7, so don't use 1.7
.