Base project를 Import 또는 New로 불러왔을 때 발생하는 문제.

- The project was not built since its build path is incomplete. Cannot find the class file for java.lang.Object. Fix the build path then try building this project

- The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files

->Project 우클릭/Android Toos/Fix Project Properties