在构建 VSCode 和 Android Studio (Flutter) 的 gradle 时，配置根项目“android”时出现问题

Question

今天开始学习 Flutter 并成功下载了一切。但是当我运行我的应用程序时，调试器（VSCode 和 Android Studio）给了我这个错误。

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
}

任何帮助将不胜感激，因为我试图解决这个问题 6 小时！

注意：- 这是我在 Flutter 和 Android Studio 中的第一个应用程序，VSCode

Answer 1

所以在找到答案后回答我自己的问题我来这里是为了帮助别人

不管是不是第一次。当您单击应用程序上的运行时，您会收到 X gradle 构建错误如果您的错误中有以下任何一行，即使是单行，请尝试此解决方案

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

去这个位置：- .flutter/packages/flutter_tools/gradle/flutter.gradle **

1. 在对文件进行编辑之前备份文件到其他位置
2. 搜索名为buildscript的东西；
3. 应该是这样的（或类似的，别担心你有备份文件）

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'
    }
}

你的问题还没有解决？如果已解决，请不要尝试下一个，否则请尝试。 （即使这不起作用，然后将备份文件放在它的位置，看看它是否工作）

然后在您的android 文件夹中转到build.gradle（在您的项目文件中转到 android/build.gradle) 并将buildscript 更改为此（不要担心代码不是100% 像这样。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
    }
}

Answer 2

在安卓工作室中： 用这种方式修改android\build.gradle即可解决这个问题。

buildscript {

        repositories {
            google()
            mavenCentral()   //Add.
            jcenter()

        }
        dependencies {
            classpath 'com.android.tools.build:gradle:3.6.2'
        }
    }

    allprojects {
        repositories {
            google()
            mavenCentral()  //Add
            jcenter()
        }
    }

我有同样的问题并通过更新此文件解决了它。 这个问题在https://github.com/flutter/flutter/issues/51604解决了

Answer 3

将flutter升级到最新版本 然后将 gradle 插件升级到最新版本

目前

 dependencies {
     classpath 'com.android.tools.build:gradle:4.1.0'
 }