android29 来源：http://chenhaodejia.iteye.com/blog/1123289 http://www.cnblogs.com/lm3515/archive/2011/03/16/1985792.html http://gqdy365.iteye.com/blog/1074076 http://blog.csdn.net/flowingflying/article/details/6304289 http://blog.csdn.net/flowingflying/article/details/6449582 问答：http://ask.csdn.net/questions/1222