使用on_audio_query:^2.9.0构建APK时出现JVM目标兼容性不一致错误

问题场景 #

使用on_audio_query: ^2.9.0开发离线音乐播放器，添加权限后构建APK时出现以下错误：

Execution failed for task ':on_audio_query_android:compileDebugKotlin'.
> Inconsistent JVM-target compatibility detected for tasks 'compileDebugJavaWithJavac' (1.8) and 'compileDebugKotlin' (17). 

项目的app/build.gradle内容：

plugins {
    id "com.android.application"
    id "kotlin-android"
    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
    id "dev.flutter.flutter-gradle-plugin"
}

android {
    namespace = "com.example.melodymate"
    compileSdk = flutter.compileSdkVersion
    ndkVersion = flutter.ndkVersion

    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = JavaVersion.VERSION_1_8
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId = "com.example.melodymate"
        // You can update the following values to match your application needs.
        // For more information, see: https://flutter.dev/to/review-gradle-config.
        minSdk = flutter.minSdkVersion
        targetSdk = flutter.targetSdkVersion
        versionCode = flutter.versionCode
        versionName = flutter.versionName
    }

    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 = "../.."
}

settings.gradle插件配置：

plugins {
    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
    id "com.android.application" version "8.1.0" apply false
    id "org.jetbrains.kotlin.android" version "2.0.20" apply false
}

解决方案 #

错误原因是on_audio_query_android模块默认使用JVM 17编译，但你的项目配置的是JVM 1.8，导致版本不一致。以下两种方法均可解决：

方法一：升级项目JVM目标版本到17 #

修改app/build.gradle中的compileOptions和kotlinOptions：

android {
    // ... 其他配置不变
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
    }

    kotlinOptions {
        jvmTarget = JavaVersion.VERSION_17
    }
    // ... 其他配置不变
}

方法二：强制所有模块使用统一JVM版本 #

在项目根目录的build.gradle（与settings.gradle同级）中添加以下配置，强制所有模块使用JVM 17编译：

subprojects {
    afterEvaluate { project ->
        if (project.hasProperty('android')) {
            android {
                compileOptions {
                    sourceCompatibility = JavaVersion.VERSION_17
                    targetCompatibility = JavaVersion.VERSION_17
                }
                kotlinOptions {
                    jvmTarget = JavaVersion.VERSION_17
                }
            }
        }
    }
}

修改完成后，重新执行构建命令即可。

内容的提问来源于stack exchange，提问作者yash gupta