Installation failed with message INSTALL_CANCELED_BY_USER.
It is possible that this issue is resolved by uninstalling an existing version of the apk if it is present, and then re-installing.
WARNING: Uninstalling will remove the application data!
Do you want to uninstall the existing application?
问题解决方案，来自：https://zhidao.baidu.com/question/1755620716993241228.html
小米手机打开USB安装即可,如果开发者选项里没有"USB安装"则 设置-更多应用-安全中心-卸载更新，再安装应用就没有问题了