Flutter项目Gradle无法解析androidx.appcompat:appcompat:1.3.0依赖求助

问题详情 #

构建Flutter项目时遭遇Gradle依赖解析错误，无法拉取androidx.appcompat:appcompat:1.3.0，错误日志如下：

Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.
> Could not resolve all task dependencies for configuration ':app:debugCompileClasspath'.
   > Could not resolve androidx.appcompat:appcompat:1.3.0.
     Required by:
         project :app

已按照Flutter官方AndroidX迁移文档添加以下配置，但问题未解决：

module:
  androidX: true # Add this line.

同时尝试过Stack Overflow相关问题的所有解决方案（含评论及回答），均无效，求可行解决办法。

补充配置文件内容 #

android\build.gradle #

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

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

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

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

tasks.register("clean", Delete) {
    delete rootProject.buildDir
}

android\app\build.gradle #

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 29

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.shopx"
        minSdkVersion 16
        targetSdkVersion 29
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    //implementation 'androidx.appcompat:appcompat:1.3.1'
    implementation group: 'com.google.android.material', name: 'material', version: '1.6.1'
    implementation 'androidx.core:core-ktx:1.0.0'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

gradle.properties #

org.gradle.jvmargs=-Xmx1536M
android.useAndroidX=true
android.enableJetifier=true

解决办法 #

1. 升级Gradle工具与Kotlin版本
   当前com.android.tools.build:gradle:3.5.0版本过低，无法兼容androidx.appcompat:1.3.0。修改android\build.gradle：

   buildscript {
       ext.kotlin_version = '1.5.31'
       repositories {
           google()
           mavenCentral()
       }
       dependencies {
           classpath 'com.android.tools.build:gradle:4.2.2'
           classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
       }
   }
   

2. 同步compileSdkVersion版本
   androidx.appcompat:1.3.0要求最低compileSdkVersion为30，修改android\app\build.gradle：

   android {
       compileSdkVersion 30
       defaultConfig {
           targetSdkVersion 30
       }
   }
   

3. 清理缓存并重新构建
   执行命令清理缓存后重新构建：

   flutter clean
   ./gradlew clean build --refresh-dependencies
   flutter run
   

4. 添加镜像仓库（网络受限环境）
   若无法访问官方仓库，在allprojects.repositories中添加国内镜像：

   allprojects {
       repositories {
           google()
           mavenCentral()
           maven { url 'https://maven.aliyun.com/repository/google' }
           maven { url 'https://maven.aliyun.com/repository/public' }
       }
   }
   

内容的提问来源于stack exchange，提问作者Eden Zane