Libgdx游戏在Android上崩溃

我使用libgdx制作了一个游戏，它以前在桌面和Android上运行良好。我不确定是因为我开始使用box2d物理引擎和liquidfun粒子，基本上发生的事情是，当我点击游戏时，它开始加载，然后加载后它应该转到gameScreen，但它崩溃了，然后说“不幸的是，myGame已经停止了”。

错误信息：

E/AndroidRuntime: FATAL EXCEPTION: GLThread 3764
Process: com.nivekbryan.puffypuff, PID: 8416
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/badlogic/gdx/physics/box2d/World;

我按照这个设置教程如何移植liquidfun库，它从2014年开始有点旧。游戏作为桌面应用程序运行 Ok。

这是我的 build.gradle 文件（依赖项），可能有什么问题？以及为什么作为桌面应用程序而不是Android应用程序工作？

buildscript {
    repositories {
        mavenLocal()
        mavenCentral()
        maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
        jcenter()
    }
    dependencies {
        classpath 'de.richsource.gradle.plugins:gwt-gradle-plugin:0.6'
        classpath 'com.android.tools.build:gradle:2.0.0'
        classpath 'com.mobidevelop.robovm:robovm-gradle-plugin:2.1.0'
    }
}

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

    version = '1.0'
    ext {
        appName = "Puffy Puff"
        gdxVersion = '1.9.3'
        roboVMVersion = '2.1.0'
        box2DLightsVersion = '1.4'
        ashleyVersion = '1.7.0'
        aiVersion = '1.8.0'
        admobVersion = '8.3.0'
    }

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

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


    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-freetype-platform:$gdxVersion:natives-desktop"
        compile fileTree(dir: 'libs', include: '*.jar')
    }
}

project(":android") {
    apply plugin: "android"

    configurations { natives }

    dependencies {
        compile project(":core")
        compile "com.badlogicgames.gdx:gdx-backend-android:$gdxVersion"
        natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi"
        natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi-v7a"
        natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-arm64-v8a"
        natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86"
        natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86_64"

        compile "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
        natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-armeabi"
        natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-armeabi-v7a"
        natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-arm64-v8a"
        natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-x86"
        natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-x86_64"
        compile "com.google.android.gms:play-services-ads:8.3.0"
        compile fileTree(dir: 'libs', include: '*.so')
    }
}

project(":ios") {
    apply plugin: "java"
    apply plugin: "robovm"


    dependencies {
        compile project(":core")
        compile "com.mobidevelop.robovm:robovm-rt:$roboVMVersion"
        compile "com.mobidevelop.robovm:robovm-cocoatouch:$roboVMVersion"
        compile "com.badlogicgames.gdx:gdx-backend-robovm:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-ios"

        compile "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-ios"
    }
}

project(":html") {
    apply plugin: "gwt"
    apply plugin: "war"


    dependencies {
        compile project(":core")
        compile "com.badlogicgames.gdx:gdx-backend-gwt:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx:$gdxVersion:sources"
        compile "com.badlogicgames.gdx:gdx-backend-gwt:$gdxVersion:sources"
    }
}

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


    dependencies {
        compile "com.badlogicgames.gdx:gdx:$gdxVersion"

        compile "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
        compile fileTree(dir: 'libs', include: '*.jar')
    }
}

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

更新：

我发现了这个解决方案链接，所以我所做的是将gdx-liquidfun.jar复制到Android ->库，然后右键单击并添加为库，但我仍然得到错误。请帮忙，提前感谢（我正在使用Intellij社区版）