目录背景说明一、备份原有 YUM 源二、下载国内源配置文件三、清理 YUM 缓存并更新四、验证新源是否生效五、测试安装软件（可选）六、恢复默认源（备用）注意事项国内镜像源推荐优先级背景说明
I am currently developing an android app in eclipse using: One project for the app One project for the tests (Instrumentation and Pojo tests)
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