Flutter项目JVM目标兼容性不一致问题求助

错误详情 #

* What went wrong:
Execution failed for task ':flutter_google_places_sdk_android:compileDebugKotlin'.
> Inconsistent JVM-target compatibility detected for tasks 'compileDebugJavaWithJavac' (1.8) and 'compileDebugKotlin' (17).

  Consider using JVM Toolchain: https://kotl.in/gradle/jvm/toolchain
  Learn more about JVM-target validation: https://kotl.in/gradle/jvm/target-validation 

已尝试的配置 #

在模块级build.gradle中添加了以下JVM版本配置，但问题未解决：

compileOptions {
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }

    kotlinOptions {
        jvmTarget = JavaVersion.VERSION_17
    }

    kotlin {
        jvmToolchain(17)
    }

    java {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
    }

环境信息 #

Flutter核心环境 #

[✓] Flutter (Channel stable, 3.13.6, on macOS 13.2.1 22D68 darwin-x64, locale en-AU)
    • Flutter version 3.13.6 on channel stable at /Users/sophiahuynh/Documents/_gitLabProjects/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ead455963c (8 weeks ago), 2023-09-26 18:28:17 -0700
    • Engine revision a794cf2681
    • Dart version 3.1.3
    • DevTools version 2.25.0

Android开发环境 #

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/sophiahuynh/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: /Users/sophiahuynh/Library/Java/JavaVirtualMachines/jbrsdk-17.0.9/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment JBR-17.0.9+7-1087.3-nomod (build 17.0.9+7-b1087.3)
    • All Android licenses accepted.

[✓] Android Studio (version 2022.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)

额外环境说明 #

• Java版本：17.0.9（Java Home、Android Studio Gradle JDK均使用该版本）
• Gradle版本：8.4（8.0版本时同样触发问题）
• Kotlin版本：1.9.20（1.8.0版本时同样触发问题）

解决方案 #

问题根源是第三方依赖flutter_google_places_sdk_android内部的Java编译目标（1.8）与Kotlin编译目标（17）不统一，你修改的是自身项目配置，未覆盖依赖内部的配置。可通过以下方式解决：

方案1：强制所有子模块统一JVM目标 #

在项目根目录的**项目级build.gradle**中添加以下配置，强制所有模块（包括第三方依赖）对齐JVM版本：

subprojects {
    afterEvaluate { project ->
        if (project.hasProperty('android')) {
            project.android {
                compileOptions {
                    sourceCompatibility JavaVersion.VERSION_17
                    targetCompatibility JavaVersion.VERSION_17
                }
                kotlinOptions {
                    jvmTarget = JavaVersion.VERSION_17.toString()
                }
            }
        }
        project.plugins.withType(org.jetbrains.kotlin.gradle.plugin.KotlinBasePluginWrapper) {
            project.kotlin {
                jvmToolchain(17)
            }
        }
    }
}

方案2：调整依赖版本 #

检查flutter_google_places_sdk的版本，尝试升级到最新稳定版，或降级至之前无问题的版本。在pubspec.yaml中指定版本：

dependencies:
  flutter_google_places_sdk: ^<兼容版本号>

方案3：清理缓存后重建 #

执行以下命令清理缓存，避免旧配置残留：

flutter clean
rm -rf ~/.gradle/caches
flutter pub get
flutter run

内容的提问来源于stack exchange，提问作者saphies