flutter学习,项目运行出错.求大佬帮忙看看,急急急

[weixin_43849339]

A problem occurred configuring root project 'android'.
> Could not resolve all artifacts for configuration ':classpath'.
> Could not resolve com.android.tools.build:gradle:3.2.1.
Required by:
project :
> Could not resolve com.android.tools.build:gradle:3.2.1.
> Could not get resource 'https://maven.aliyun.com/repository/google/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
> Could not HEAD 'https://maven.aliyun.com/repository/google/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
> sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

[失落夏天]

工程目录/gradle/wapper里面配置的gradletool的版本有问题。 建议使用：distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip 版本，能避免很多问题