flutter 一直卡在Running Gradle task

前段时间升级了mac系统到Catalina，然后又升级了android studio到4.0，后来打开flutter项目，执行flutter run 一直卡在Running Gradle task 'assembleDebug'...，等好久都没用，网上搜索了半天，最终解决了问题，记录一下

1.首先 将项目android目录下的build.gradle中google()和jcenter()替换成阿里镜像地址

        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' }

如下图

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2.修改本地的flutter配置文件，flutter安装目录下找到

packages/flutter_tools/gradle/flutter.gradle文件，修改同上

3.还是修改上面那个文件，将MAVEN_REPO 地址替换为 https://storage.flutter-io.cn/download.flutter.io

image.png

4.修改packages/flutter_tools/gradle/resolve_dependencies.gradle

替换maven地址为http://download.flutter.io

image.png