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

Flutter版本：3.22.3

该解决办法源自https://www.cnblogs.com/fanqisoft/p/17528904.html，但是原文已不适用于最新版本。

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

该文件一般位于flutter\packages\flutter_tools\gradle\src\main\groovy\

• Step 1

// This buildscript block supplies dependencies for this file's own import
// declarations above. It exists solely for compatibility with projects that
// have not migrated to declaratively apply the Flutter Gradle Plugin;
// for those that have, FGP's `build.gradle.kts`  takes care of this.
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 in FlutterExtension in packages/flutter_tools/gradle/src/main/groovy/flutter.groovy
        //  * AGP version in the buildscript block in packages/flutter_tools/gradle/src/main/kotlin/dependency_version_checker.gradle.kts
        //  * AGP version constants in packages/flutter_tools/lib/src/android/gradle_utils.dart
        //  * AGP version in dependencies block in packages/flutter_tools/gradle/build.gradle.kts
        classpath("com.android.tools.build:gradle:7.3.0")
    }
}

• Step 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"

• Step 3

                //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Flutter SDK目录下的resolve_dependencies.gradle

该文件一般位于flutter\packages\flutter_tools\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"

String engineRealm = Paths.get(flutterRoot.absolutePath, "bin", "internal", "engine.realm")
        .toFile().text.trim()
if (engineRealm) {
    engineRealm = engineRealm + "/"
}

repositories {
    // google()
    // mavenCentral()
    maven {
        url "$storageUrl/${engineRealm}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

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' }
    }
}