Please use Android Tools > Fix Project Properties

Android requires compiler compliance level 5.0 or 6.0. Found '1.7' instead. Please use Android Tools > Fix Project Properties.

1. 项目 右键 ->android tools ->Fix Project

2. 如果不可以，检查Project -> Properties->Java Compiler
确认JDK compliance被设置为1.6,并且enable specific seetings