Failed to resolve:com.android.support:appcompat-v7:27.+问题解决 创建新工程出现这个问题,在网上查资料说要在SDK安装repository,然而我的已经安装了。 Failed to resolve:com.android.support:appcompat-v7:27.+问题解决 解决办法: 点击左上角File>ProjectStructure>app>Dependencies Failed to resolve:com.android.support:appcompat-v7:27.+问题解决 Failed to resolve:com.android.support:appcompat-v7:27.+问题解决 Failed to resolve:com.android.support:appcompat-v7:27.+问题解决 点击OK>OK,重新构建项目。