我正在尝试开始使用颤振。但是在应用程序上执行flutter run时出现此错误。
A problem occurred configuring root project 'android'.
Could not resolve all dependencies for configuration ':classpath'.
Could not download antlr.jar (org.antlr:antlr:3.5.2)
Could not get resource 'https://jcenter.bintray.com/org/antlr/antlr/3.5.2/antlr-3.5.2.jar'.
Could not GET 'https://jcenter.bintray.com/org/antlr/antlr/3.5.2/antlr-3.5.2.jar'.
Connect to jcenter.bintray.com:443 [jcenter.bintray.com/108.168.243.150] failed: Connection timed out"
我下载了antlr-3.5.2.jar，但我不知道如何解决这个问题。 有任何想法吗？ 感谢