配置根项目'android'Flutter时发生问题

是否是第一次。当您在应用程序上单击“运行”时，您会收到X gradle构建错误如果您的错误中包含以下任何行，甚至只有一行，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

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. 搜索称为“东西”的东西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
    }
}