Installation failed with message INSTALL_FAILED_USER_RESTRICTED: 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?
真机调试的时候一直无法安装软件，即便点击OK还是失败
网上好多针对android stuio的设置都对我的不管用
原来是手机的问题
解决办法：打开手机开发者模式的USB安装