【错误记录】Android Studio 编译报错 ( e: Unknown JVM target version: 1.9 Supported versions: 1.6, 1.8, 9, 10 )_inconsistent jvm-target compatibility detected for

一、错误记录

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在 Android Studio 中编译执行 Android 工程 , 报如下错误 :

e: Unknown JVM target version: 1.9

Supported versions: 1.6, 1.8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18

Task :app:compileDebugKotlin FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ‘:app:compileDebugKotlin’.
  A failure occurred while executing org.jetbrains.kotlin.compilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
  Compilation error. See log for more details

完整报错信息 :

> Task :app:compileDebugKotlin
'compileDebugJavaWithJavac' task (current target is 1.8) and 'compileDebugKotlin' task (current target is 1.9) jvm target compatibility should be set to the same Java version.
e: Unknown JVM target version: 1.9
Supported versions: 1.6, 1.8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18

> Task :app:compileDebugKotlin FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.compilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
   > Compilation error. See log for more details

* Try:
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:compileDebugKotlin'.


* Get more help at https://help.gradle.org

BUILD FAILED in 2m 2s
30 actionable tasks: 30 executed
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二、解决方案

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报错的核心问题 , 发现未知的 Java 虚拟机版本 1.9 , 支持的 JVM 版本号只能是 1.6, 1.8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 中的版本号 ;

e: Unknown JVM target version: 1.9
Supported versions: 1.6, 1.8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18
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在 Settings 设置中 , 设置的 JDK 版本是 11 版本的 ;

在 build.gradle 中 , 发现有 如下设置 , 其中设置了 jvmTarget 为 1.9 版本 ;

android {
    namespace 'kim.hsl.databinding_demo'
    compileSdk 32
    
    kotlinOptions {
        jvmTarget = '1.9'
    }
}
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这是由 Android Studio 自动生成的版本 , 居然报错 ;

将该版本修改为 9 , kotlinOptions { jvmTarget = ‘9’ } 然后重新编译 , 编译通过 ;

核心文件代码示例 :

android {
    namespace 'kim.hsl.databinding_demo'
    compileSdk 32
    
    kotlinOptions {
        jvmTarget = '9'
    }
}
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修改后的完整配置文件 :

plugins {
    id 'com.android.application'
    id 'org.jetbrains.kotlin.android'
}

android {
    namespace 'kim.hsl.databinding_demo'
    compileSdk 32

    defaultConfig {
        applicationId "kim.hsl.databinding_demo"
        minSdk 21
        targetSdk 32
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

        // 启用 DataBinding
        dataBinding {
            enabled = true
        }
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = '9'
    }
}

dependencies {
    implementation 'androidx.core:core-ktx:1.7.0'
    implementation 'androidx.appcompat:appcompat:1.4.1'
    implementation 'com.google.android.material:material:1.5.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}
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