java.lang.NoClassDefFoundError：libgdx 中的 kotlin/jvm/internal/Intrinsics

Question

在我的 libgdx gradle 应用程序中，我有一个 GroundHandler 类：

package com.mygdx.physics

import com.badlogic.gdx.ApplicationAdapter
import com.badlogic.gdx.Gdx
import com.badlogic.gdx.math.Vector2

import com.badlogic.gdx.physics.box2d.Fixture
import com.badlogic.gdx.physics.box2d.Body
import com.badlogic.gdx.physics.box2d.BodyDef
import com.badlogic.gdx.graphics.OrthographicCamera
import com.badlogic.gdx.physics.box2d.PolygonShape

import com.badlogic.gdx.physics.box2d.World

class GroundHandler(val world: World, val camera: OrthographicCamera) {
  private var groundBodyDef: BodyDef = BodyDef()
  private var groundBox: PolygonShape = PolygonShape()
  private var groundBody: Body? = null

  fun createGround() {
    groundBodyDef.position.set(Vector2(0f, 10f))
    groundBody = world.createBody(groundBodyDef)
    groundBox.setAsBox(camera.viewportWidth, 10.0f)
    groundBody?.createFixture(groundBox, 0.0f)
    groundBox.dispose()
  }
}

在不同的类中使用。起初它编译得很好，但是当应用程序窗口启动时我得到了

Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.NoClassDefFoundError: kotlin/jvm/internal/Intrinsics
        at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:133)
Caused by: java.lang.NoClassDefFoundError: kotlin/jvm/internal/Intrinsics
        at com.mygdx.physics.GroundHandler.<init>(GroundHandler.kt)
        at com.mygdx.physics.Physics.createGround(Physics.kt:60)
        at com.mygdx.physics.Physics.create(Physics.kt:31)

Physics 31 是我调用 createGround() 的一行

更新：

按要求构建.gradle（没有 jar{} 部分不起作用）

buildscript {
  ext.kotlin_version = '1.1.51'

  repositories {
      mavenLocal()
      mavenCentral()
      maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
      jcenter()
  }
  dependencies {
      classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
  }
}

allprojects {
    apply plugin: "eclipse"
    apply plugin: "idea"

    version = '1.0'
    ext {
        appName = "physics game"
        gdxVersion = '1.9.6'
        roboVMVersion = '2.3.1'
        box2DLightsVersion = '1.4'
        ashleyVersion = '1.7.0'
        aiVersion = '1.8.0'
    }

    repositories {
        mavenLocal()
        mavenCentral()
        maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
        maven { url "https://oss.sonatype.org/content/repositories/releases/" }
    }
}

project(":core") {
    apply plugin: "kotlin"


    dependencies {
        compile "com.badlogicgames.gdx:gdx:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-box2d:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-bullet:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-controllers:$gdxVersion"
        compile "com.badlogicgames.box2dlights:box2dlights:$box2DLightsVersion"
        compile "com.badlogicgames.gdx:gdx-ai:$aiVersion"
        compile "com.badlogicgames.ashley:ashley:$ashleyVersion"

    }
}

project(":desktop") {
    apply plugin: "kotlin"


    dependencies {
        compile project(":core")
        compile "com.badlogicgames.gdx:gdx-backend-lwjgl:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-desktop"
        compile "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-desktop"
        compile "com.badlogicgames.gdx:gdx-bullet-platform:$gdxVersion:natives-desktop"
        compile "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-desktop"
        compile "com.badlogicgames.gdx:gdx-tools:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-controllers-desktop:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-controllers-platform:$gdxVersion:natives-desktop"

    }
}

tasks.eclipse.doLast {
    delete ".project"
}

我所做的只是将 'java' 更改为 'kotlin' 两次，并将 kotlin 依赖项添加到 buildscript {}

Answer 1

只需像这样添加 jar{} 部分 indo desktop.gradle：

apply plugin: "kotlin"

sourceCompatibility = 1.6
sourceSets.main.java.srcDirs = [ "src/" ]

project.ext.mainClassName = "com.your.class.name"
project.ext.assetsDir = new File("../android/assets");

jar {
    manifest {}
    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
}