解决Flutter编译一直显示Running Gradle task 'assembleDebug'

该问题由 Gradle 的Maven仓库在国外访问受限引起，使用阿里云的镜像仓库地址替代解决

1.修改Flutte SDK目录下的Flutter打包配置文件flutter.gradle

一般位于flutter\packages\flutter_tools\gradle\flutter.gradle

1

buildscript {
    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/repository/public' }
    }
    dependencies {
        /** When bumping, also update ndkVersion above, as well as the Android Gradle Plugin
         * version in ../lib/src/android/gradle_utils.dart.
         */
        classpath 'com.android.tools.build:gradle:7.3.0'
    }
}

2

    //此处可以配置环境变量FLUTTER_STORAGE_BASE_URL为 https://storage.flutter-io.cn来达到相同的效果
    private static final String DEFAULT_MAVEN_HOST = "https://storage.flutter-io.cn";
    //private static final String DEFAULT_MAVEN_HOST = "https://storage.googleapis.com";

3

    @Override
    void apply(Project project) {
        .....
        // Configure the Maven repository.
        String hostedRepository = System.env.FLUTTER_STORAGE_BASE_URL ?: DEFAULT_MAVEN_HOST
        String repository = useLocalEngine()
            ? project.property('local-engine-repo')
            : "$hostedRepository/download.flutter.io"
        rootProject.allprojects {
            repositories {
                maven {
                    url repository
                }
                //追加下面的内容
                maven { url 'https://maven.aliyun.com/repository/google' }
                maven { url 'https://maven.aliyun.com/repository/jcenter' }
                maven { url 'https://maven.aliyun.com/repository/public' }
            }
        }
        .....
    }

2.修改Flutte SDK目录下的resolve_dependencies.gradle

一般位于flutter\packages\flutter_tools\gradle\resolve_dependencies.gradle

...
//此处可以配置环境变量FLUTTER_STORAGE_BASE_URL为 https://storage.flutter-io.cn来达到相同的效果
String storageUrl = System.getenv('FLUTTER_STORAGE_BASE_URL') ?: "https://storage.flutter-io.cn"
//String storageUrl = System.getenv('FLUTTER_STORAGE_BASE_URL') ?: "https://storage.googleapis.com"

repositories {
    //google()
    //mavenCentral()
    maven {
        url "$storageUrl/download.flutter.io"
    }
    //追加下面
    maven { url 'https://maven.aliyun.com/repository/google' }
    maven { url 'https://maven.aliyun.com/repository/jcenter' }
    maven { url 'https://maven.aliyun.com/repository/public' }
}
...

3.修改Flutter项目下的android下的build.gradle

buildscript {
    ext.kotlin_version = '1.7.10'
    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/repository/public' }
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:7.4.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

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/repository/public' }
    }
}
.....