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Android 备份(提取)apk

具体详情见http://blog.csdn.net/zhouyuanjing/article/details/78562542

Android 获取USB扫描枪扫描数据（无界面）

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Android App切换网络模式(4G,3G,2G,飞行模式)

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android USB主从设备通讯

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