错误：无法添加任务“清理”，因为具有该名称的任务已存在

Question

我在从 Gradle 构建时遇到问题。这是我面临的错误：错误：无法添加任务“清理”，因为具有该名称的任务已存在。这是我的 Gradleapply plugin: 'com.android.application'android {compileSdkVersion 28buildToolsVersion "25.0.1"defaultConfig {    applicationId "net.accedegh.retrofitlibrary"    minSdkVersion 17    targetSdkVersion 28    versionCode 1    versionName "1.0"    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"}buildTypes {    release {        minifyEnabled false        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'    }}dependencies {implementation fileTree(dir: 'libs', include: ['*.jar'])androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {    exclude group: 'com.android.support', module: 'support-annotations'})//noinspection GradleCompatibleimplementation 'com.android.support:appcompat-v7:28.0.0'implementation "com.android.support:recyclerview-v7:28.0.0"implementation 'com.android.support:cardview-v7:28.0.0'implementation 'com.squareup.retrofit2:retrofit:2.1.0'implementation 'com.squareup.retrofit2:converter-gson:2.1.0'implementation 'com.squareup.picasso:picasso:2.4.0'implementation 'com.github.jd-alexander:LikeButton:0.2.0'implementation'com.github.bumptech.glide:glide:3.7.0'compile 'com.github.varunest:sparkbutton:1.0.3'implementation 'com.android.support:design:28.0.0'androidTestCompile 'junit:junit:4.12'}顶级build.gradle文件// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript {     repositories {         jcenter()         google()     }    dependencies {         classpath 'com.android.tools.build:gradle:3.3.2'        // NOTE: Do not place your application dependencies here; they belong        // in the individual module build.gradle files    } } allprojects {     repositories {         maven {             url 'maven.google.com'             name 'Google'         }     }     task clean(type: Delete) {         delete rootProject.buildDir     } }如果有人知道，请给我解决方案。

Answer 1

您在项目级别定义了此任务build.gradle（如您的评论中发布的那样）：

task clean(type: Delete) { 

    delete rootProject.buildDir 

}

Android Studio 的 Gradle 包装器已经clean定义了一个任务，因此无需重新定义它。只需从项目级build.gradle文件中删除该任务即可。