配置环境操作步骤可按这篇文章
https://book.flutterchina.club/chapter1/install_flutter.html

但是按照操作，也会出现各种配置问题

Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0
Syncing files to device failed 
Plugin with id 'kotlin-android' not found.
ProcessException: Process “C:\..\myapp\android\gradlew.bat” exited abnormally:

耗费了大量时间，才总算解决
现在给一揽子解决方案

步骤一

保证flutter链接上
flutter doctor
出现4个√即可保证flutter已经ok

步骤二

打开build.gradle
使用阿里云镜像

buildscript {
    ext.kotlin_version = '1.2.71'
    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'}

    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

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'}
    }
}

步骤三

打开…\flutter\packages\flutter_tools\gradle\flutter.gradle

修改buildscript{}如下

buildscript {
	repositories {
		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'
		}
	}
	dependencies {
		classpath 'com.android.tools.build:gradle:3.2.1'
	}
}

然后运行，注意classpath 需要3.2.1版本，一开始我的是3.5.0版本，但是实测有误，最好改成3.2.1

最后，在某些模拟器上可能会闪退（如网易mumu，又耗我一小时！！！）
在我手机上可以运行，证明配置没问题了

android studio将显示如下

flutter运行成功