其实说到底就是国内访问google源太慢或者超时，所以两个方案

方案一：让自己能顺利访问google 懂得都懂

方案二：更换镜像地址，一共需要更换一下3个地方

1-更改 flutter/packages/flutter_tools/gradle/flutter.gradle文件

将google、mavencentral换成阿里云的镜像

buildscript {repositories {
// 修改前
//        google()
//        mavenCentral()//修改后maven { url 'https://maven.aliyun.com/repository/google' }maven { url 'https://maven.aliyun.com/repository/jcenter' }maven { url 'https://maven.aliyun.com/nexus/content/groups/public' }}dependencies {/* When bumping, also update ndkVersion above. */classpath 'com.android.tools.build:gradle:4.1.0'}
}

2-更改flutter/packages/flutter_tools/gradle/resolve_dependencies.gradle文件

repositories {
//更改前
//    google()
//    mavenCentral()//更改后maven { url 'https://maven.aliyun.com/repository/google' }maven { url 'https://maven.aliyun.com/repository/jcenter' }maven { url 'https://maven.aliyun.com/nexus/content/groups/public' }maven {url "$storageUrl/download.flutter.io"}
}

3-更改android/build.gradle文件

同上
buildscript {ext.kotlin_version = '1.6.10'repositories {
//        google()
//        mavenCentral()maven { url 'https://maven.aliyun.com/repository/google' }maven { url 'https://maven.aliyun.com/repository/jcenter' }maven { url 'https://maven.aliyun.com/nexus/content/groups/public' }}}allprojects {repositories {
//        google()
//        mavenCentral()maven { url 'https://maven.aliyun.com/repository/google' }maven { url 'https://maven.aliyun.com/repository/jcenter' }maven { url 'https://maven.aliyun.com/nexus/content/groups/public' }}
}