[android] android requires compiler compliance level 5.0 or 6.0. found '1.7' 뜰때 해결법

http://blog.naver.com/PostView.nhn?blogId=87kks&logNo=40142099754&categoryNo=22&viewDate=&currentPage=1&listtype=0&userTopListOpen=false&userTopListCount=5&userTopListManageOpen=false&userTopListCurrentPage=undefined 

jdk 버전을 바꿔가면서 해보자.