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在构建gradle时，同时配置VSCode和Android Studio（Flutter）时，配置根项目“ android”时发生问题

问题内容：

今天，我开始学习Flutter，并成功下载了所有内容。但是，当我运行我的应用时，调试器（VSCode和Android Studio）都给我这个错误。

Launching lib\main.dart on sdk gphone x86 in debug mode...

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all artifacts for configuration ':classpath'.
   > Could not download builder.jar (com.android.tools.build:builder:3.5.0)
      > Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/builder/3.5.0/builder-3.5.0.jar'.
         > Premature end of Content-Length delimited message body (expected: 8174407; received: 4456416
   > Could not download bundletool.jar (com.android.tools.build:bundletool:0.9.0)
      > Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/bundletool/0.9.0/bundletool-0.9.0.jar'.
         > Premature end of Content-Length delimited message body (expected: 5248142; received: 4456416

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org

BUILD FAILED in 21m 37s
Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

这是 build.gradle

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

由于我要解决6个小时的问题，因此不胜感激！

注意：-这是我有史以来第一个在Flutter和Android Studio中使用VSCode的应用程序


问题答案：

所以找到答案后回答我自己的问题我来这里是为了帮助别人

是否是第一次。当您在应用程序上单击“运行”时，您将得到X gradle构建错误。

Launching lib\main.dart on sdk gphone x86 in debug mode...

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all artifacts for configuration ':classpath'.
   > Could not download builder.jar (com.android.tools.build:builder:3.5.0)
      > Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/builder/3.5.0/builder-3.5.0.jar'.
         > Premature end of Content-Length delimited message body (expected: 8174407; received: 4456416
   > Could not download bundletool.jar (com.android.tools.build:bundletool:0.9.0)
      > Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/bundletool/0.9.0/bundletool-0.9.0.jar'.
         > Premature end of Content-Length delimited message body (expected: 5248142; received: 4456416

SOLUTION

转到此位置：- .flutter/packages/flutter_tools/gradle/flutter.gradle **

  1. *在对其进行编辑之前，将文件 *备份 到另一个位置
  2. 寻找某种东西buildscript;
  3. 它应该像这样出现（或类似，不要担心您有备份文件）

并覆盖此代码

 buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
    }
}

有了这个

 buildscript {
    repositories {
        maven {
            url 'https://dl.google.com/dl/android/maven2'
        }
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
    }
}

还是，您的问题没有解决？如果解决了，请不要尝试下一个，否则请尝试。（即使这不起作用，也将备份文件放到原处，看看它是否起作用）

然后在android文件夹中转到build.gradle（在项目文件中转到
android/build.gradle）并将其更改buildscript为（不用担心代码不是100％这样的。只需在显示的位置添加指定的行即可）

buildscript {
    repositories {
        google()
        mavenCentral()  //add this line
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1' // Doesn't matter what you have here
    }
}