[复制别人的工程报错一]Multiple markers at this line

问题细述 ：

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

         required .class files
        - The type Enum is not generic; it cannot be parameterized with arguments
        - The type java.lang.Enum cannot be resolved. It is indirectly referenced from 
         required .class files
        - The type java.lang.Enum cannot be resolved. It is indirectly referenced from 

         required .class files

解决方案： 工程右键 -> Properties ->android ->选择一个android的版本