先是看了别人的文章 Flutter项目启动一直卡在Running Gradle task ‘assembleDebug‘问题解决 - 灰信网（软件开发博客聚合） (freesion.com)，
做了同样的处理，但接着又报错
A problem occurred configuring root project 'android'.
> Could not resolve all dependencies for configuration ':classpath'.
> Using insecure protocols with repositories, without explicit opt-in, is unsupported. Switch Maven repository 'maven3(http://maven.aliyun.com/nexus/content/groups/public)' to redirect to a secure protocol (like HTTPS) or allow insecure protocols. See https://docs.gradle.org/7.5/dsl/org.gradle.api.artifacts.repositories.UrlArtifactRepository.html#org.gradle.api.artifacts.repositories.UrlArtifactRepository:allowInsecureProtocol for more details.
去查了一下，原因如下：
解决方法：
将上面参考别人的文章一二步骤中添加的连接中的 http（下图圈起来的部分） 都改为https，即可运行成功
标签：assembleDebug,...,task,Could,repositories,gradle,resolve,dependencies,org From： https://www.cnblogs.com/endless-g/p/17233020.html