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http://blog.csdn.net/abc5382334/article/details/17097633
http://keeponmoving.iteye.com/blog/1515611
http://www.cnblogs.com/suinuaner/archive/2013/04/11/android_fifty.html
http://blog.csdn.net/lanjianhun/article/details/8675299
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http://www.cnphp6.com/archives/58164
http://blog.csdn.net/weihan1314/article/details/8045993
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原文地址：http://www.cnblogs.com/pengmn/p/4817434.html
