无法获取未知属性“ android”

Question

我一直在阅读本教程，以了解如何为Unity创建Android服务：http： //eppz.eu/blog/unity-android-plugin-tutorial-2/

这里显示了一个Gradle构建脚本片段，因此我复制了它并对其进行了少许修改，以便可以正确地部署到我的Unity项目中。

但是，当我运行/同步Gradle脚本时，似乎在抱怨其中的'android'变量/关键字（或其他含义）。我不认为这是我的修改引起的，因为该android.libraryVariants.all { ... }部分在本教程中以以下内容开头：

（编辑：我把整个build.gradle文件放在这里，以防万一我丢失了）

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.2'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

android.libraryVariants.all { variant ->
    // Task names.
    String pluginName = "DemoPlugin";
    String variantName = "${variant.name.capitalize()}"; // Like 'Debug'
    String deployTaskGroup = "plugin";
    String deployTaskName = "deploy${variantName}PluginArchive"; // Like 'deployDebugPluginArchive'
    String dependencyTaskName = "assemble${variantName}"; // Like 'assembleDebug'
    // Source.
    String sourceAARFolder = "${buildDir.getPath()}/release-jars/";
    String sourceAARName = "${project.name}-${variant.name}.jar";

    // Pierre: Unity project directory
    String targetProjDir = System.env.UNITY_PROJECT;

    // Target.
    String targetAssetFolder = "Assets/Plugins/${pluginName}";
    String targetAARFolder = "${targetProjDir}/${targetAssetFolder}"; // Navigate into 'Assets'
    String targetAARName = "${pluginName}.jar"; // The form you ship your plugin
    // Create task.
    task(deployTaskName, dependsOn: dependencyTaskName, type: Copy) {
        from(sourceAARFolder)
        into(targetAARFolder)
        include(sourceAARName)
        rename(sourceAARName, targetAARName)
    }.group = deployTaskGroup;
}

有什么想法可能导致该错误吗？

错误：（25，1）评估根项目'DemoService'时出现问题。无法获得类型为org.gradle.api.Project的根项目“ DemoService”的未知属性“ android”。

Answer 1

将代码粘贴到模块的生成文件中，而不是顶级文件中。