Android Studio:无法加载类"com.google.common.base.Preconditions"，Gradle同步失败 [英] Android Studio: Unable to load class 'com.google.common.base.Preconditions', Gradle Sync Failed

问题描述

当我尝试在Android Studio 3.1.2上打开项目时，出现此Gradle Project Sync失败错误，并显示以下消息

When i try opening my projects on Android Studio 3.1.2, I get this Gradle Project Sync failed error with the message below

无法加载类"com.google.common.base.Preconditions".可能的 导致此意外错误的原因包括:

• Gradle的依赖项 缓存可能已损坏(网络连接后有时会发生这种情况 超时.)重新下载依赖项并同步项目(要求 网络)
• Gradle构建过程(守护程序)的状态可能是 腐败.停止所有Gradle守护程序可以解决此问题.停止 Gradle构建过程(需要重新启动)
• 您的项目可能是 使用与其他插件不兼容的第三方插件 项目中要求的插件或Gradle要求的版本 项目.

Unable to load class 'com.google.common.base.Preconditions'. Possible causes for this unexpected error include:

• Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.) Re-download dependencies and sync project (requires network)
• The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem. Stop Gradle build processes (requires restart)
• Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.

gradle-wrapper.properties文件

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

build.gradle文件

buildscript {
    ext.kotlin_version = '1.2.41'
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

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

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

task clean(type: Delete) {
    delete rootProject.buildDir
}
repositories {
    mavenCentral()
}
dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
}
compileKotlin {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}
compileTestKotlin {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

推荐答案

问题已解决.

我删除了主用户目录中的.gradle文件夹，这使Android Studio重新下载了gradle当前版本的所有文件.第一次下载和同步花了很长时间，但是已经解决了这个问题.

I deleted the .gradle folder in my home user directory which made Android Studio re-download all the files for the current version of gradle. It took quite a while to download and sync the first time but it has solved the problem.

非常感谢@Luis Henriques的帮助

Thank you very much for your assistance @Luis Henriques

这篇关于Android Studio:无法加载类"com.google.common.base.Preconditions"，Gradle同步失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！