Android requires compiler compliance level 5.0 or 6.0. Found '1.7' instead 在解决问题Underscores can only be used with source level 1.7 or greater时,将compiler compliance level改为1.7后遇到此错误. 网上解决办法为http://www.cnblogs.com/henryxu/archive/2012/08/07/2626964.htm