Gradle 无法将依赖项添加到我的LibGDX项目中的gdx pd

各位!！我正在尝试向in build.gradle添加依赖项，但当我尝试对项目进行synk时，出现以下错误：

原因：groovy.lang.MissingPropertyException:无法获取类型为org.gradle.api.internal.artifacts.dsl.dependency.DefaultDependencyHandler的对象的未知属性“pdVersion”

这是我的Gradle文件的外观：

buildscript {


repositories {
    mavenLocal()
    mavenCentral()
    maven { url "https://plugins.gradle.org/m2/" }
    maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
    jcenter()
    google()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.6.1'


}

}

所有项目{

version = '1.0'
ext {
    appName = "audio-demo"
    gdxVersion = '1.9.10'
    roboVMVersion = '2.3.7'
    box2DLightsVersion = '1.4'
    ashleyVersion = '1.7.0'
    aiVersion = '1.8.0'
}

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

}

项目（“：桌面”）{ 应用插件：“java库”

}

项目（“：android”）{ 应用插件：“android”

}

项目（“核心”）{ 应用插件：“java库”

}

如果我尝试像这样指定$pdVersion：

ext {
    ...
    pdVersion = '0.7.0'
}

我得到另一个错误：

错误：未能解析：net.mgsx.gdx:gdx pd:0.7.0 在“项目结构”对话框中显示 受影响的模块：核心 错误：未能解析：net.mgsx.gdx:gdx pd:0.7.0 在“项目结构”对话框中显示 受影响模块：android

---

我做错了什么？提前谢谢你

该库的自述文件说它在Maven Central（或任何公共Maven repo）上都不可用，因此您必须在本地构建它并发布到本地Maven repo。

configurations { natives }

dependencies {
    implementation project(":core")
    api "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"
    api "com.badlogicgames.gdx:gdx-box2d:$gdxVersion"
    natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-armeabi"
    natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-armeabi-v7a"
    natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-arm64-v8a"
    natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-x86"
    natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-x86_64"
    api "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"
    api "net.mgsx.gdx:gdx-pd-backend-android:$pdVersion"
    natives "net.mgsx.gdx:gdx-pd-platform:$pdVersion:natives-armeabi"
    natives "net.mgsx.gdx:gdx-pd-platform:$pdVersion:natives-armeabi-v7a"
    natives "net.mgsx.gdx:gdx-pd-platform:$pdVersion:natives-arm64-v8a"
    natives "net.mgsx.gdx:gdx-pd-platform:$pdVersion:natives-x86"
    natives "net.mgsx.gdx:gdx-pd-platform:$pdVersion:natives-x86_64"
}

dependencies {
    api "com.badlogicgames.gdx:gdx:$gdxVersion"
    api "com.badlogicgames.gdx:gdx-box2d:$gdxVersion"
    api "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
    api "net.mgsx.gdx:gdx-pd:$pdVersion"
}

ext {
    ...
    pdVersion = '0.7.0'
}