java无法获取类型为org的根项目“MyApplication3”的未知属性“Delete”。格雷德尔。应用程序编程接口。项目

Question

Android studio 3.1.2->；新项目->；生成失败，日志中出现以下问题：

Could not get unknown property 'Delete' for root project 'MyApplication3' of type org.gradle.api.Project.
Open File

这是构建。格雷德尔：

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

buildscript {

repositories {
    google()
    jcenter()
}
dependencies {
    classpath 'com.安卓.tools.build:gradle:3.1.2'


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

allprojects {
    repositories {
        google()
        jcenter()
    }
}

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

最后三行是问题所在。默认情况下会添加它

如何解决这个问题