Flutter项目构建报错：Kotlin Gradle插件版本不符及任务创建失败

错误1：Kotlin Gradle插件版本不兼容 #

FAILURE: Build failed with an exception.

• What went wrong:
  The Android Gradle plugin supports only Kotlin Gradle plugin version 1.5.20 and higher.
  The following dependencies do not satisfy the required version:
  project ':pdf_merger' -> org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.31

原因 #

项目依赖的pdf_merger插件使用的Kotlin Gradle插件版本（1.4.31）低于Android Gradle插件（AGP 7.1.2）要求的最低版本（1.5.20），导致版本不兼容。

解决方案 #

在**app模块的build.gradle**中添加版本强制配置，让所有子模块统一使用你指定的Kotlin版本：

android {
    // ... 保留原有配置
    
    // 添加以下内容
    configurations.all {
        resolutionStrategy {
            force "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.21"
            force "org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.21"
        }
    }
}

错误2：构建任务路径冲突 #

Multiple build operations failed.
Could not create task ':path_provider_android:generateDebugUnitTestConfig'.
Could not create task ':url_launcher_android:generateDebugUnitTestConfig'.
Could not create task ':path_provider_android:generateDebugUnitTestConfig'.
this and base files have different roots: D:\App_Dev\flutter_projects\diagnosis\build\path_provider_android and C:\Users\ziadg\AppData\Local\Pub\Cache\hosted\pub.dev\path_provider_android-2.2.4\android.

原因 #

Flutter插件的本地构建输出路径与Pub缓存路径存在冲突，导致Gradle无法正常创建构建任务。

解决方案 #

1. 执行Flutter清理命令清除本地构建缓存：

flutter clean

2. 删除项目根目录下的.gradle文件夹和app/build文件夹
3. 重新获取项目依赖：

flutter pub get

4. 重启Android Studio后重新构建项目

修改后的app模块build.gradle参考代码 #

plugins {
    id "com.android.application"
    id 'com.google.gms.google-services'
    id "kotlin-android"
    id "dev.flutter.flutter-gradle-plugin"
}

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

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

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

android {
    namespace "com.example.diagnosis"
    compileSdk flutter.compileSdkVersion
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

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

    // 新增版本统一配置
    configurations.all {
        resolutionStrategy {
            force "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.21"
            force "org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.21"
        }
    }

    defaultConfig {
        applicationId "com.example.diagnosis"
        minSdkVersion 21
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

内容的提问来源于stack exchange，提问作者Ziad Ghanem