条码扫描二维码扫描——ZXing android 源码简化

http://www.cnblogs.com/keyindex/archive/2011/06/08/2074900.html

http://www.cnblogs.com/tankaixiong/archive/2010/10/31/1865807.html

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http://blog.csdn.net/smking/article/details/7310178