Flutter环境搭建报错：What went wrong: A problem occurred configuring root project 'android'

window下，在AS中搭建Flutter环境，创建Flutter项目报错,报错信息如下：

文件加载失败，需要更换gradle文件中的镜像

1. 找到.gradle文件

2 更改镜像

//更改镜像
repositories {
        //google()
        //jcenter()
        maven{ url 'https://maven.aliyun.com/repository/google' }
        maven{ url 'https://maven.aliyun.com/repository/jcenter' }
        maven{url 'http://maven.aliyun.com/nexus/content/groups/public'}
    }

    allprojects {
        repositories {
            //google()
            //jcenter()
            maven{ url 'https://maven.aliyun.com/repository/google' }
            maven{ url 'https://maven.aliyun.com/repository/jcenter' }
            maven{url 'http://maven.aliyun.com/nexus/content/groups/public'}
        }
    }