ysy - 云代码空间
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http://www.cnblogs.com/qianxudetianxia/archive/2012/02/20/2112128.html
http://blog.csdn.net/lnb333666/article/details/8460159
http://www.oschina.net/code/snippet_219356_18887?p=2#comments
http://my.eoe.cn/zyllvlyh/archive/2198.html
http://mobile.51cto.com/android-288600.htm
http://www.androidlearner.net/android-cache-management-lru.html