尝试将以下内容google()作为第一个回购。不要把它放在jcenter()和mavenCentral()你现有的Android Studio项目。
repositories { google() // make this repo as the first one if Android Gradle Plugin is upgraded from 2.x to 3.x. jcenter() mavenCentral()}
对于使用Android Gradle Plugin较低版本（例如2.2.3）的React Native或Cordovalib项目，你可以尝试将其替换为google()以下内容，但请记住将其作为第一个回购选择。
repositories { // google() maven {url 'https://maven.google.com' } jcenter()}
清理所有旧.gradle缓存，然后执行新的同步。
解决方法我试图熟悉夏季爱好的构建应用程序。但是，在过去几天中，当我尝试同步Gradle时，出现了相同的错误，指出
gradle-core.jar无法下载。
我将在这篇文章的底部发布完整的错误消息。
当然，我确保我不在离线模式下工作。最重要的是，我强迫https://使用来获取源http://。我还将文件中https://distributionUrl 更改为http：// gradle-wrapper.properties。我尝试了不同的代理，并已将build.gradle文件中的存储库更改为jcenter(),mavenCentral(),and google().
我什至尝试与防火墙同步，并且防病毒功能已关闭，但没有任何作用。在下面，你将找到我的整个错误消息。
org.gradle.api.ProjectConfigurationException: A problem occurred configuring root project ’AndroidStudioProjects’.... at org.gradle.configuration.project.LifecycleProjectEvaluator.doConfigure(LifecycleProjectEvaluator.java:64) ... 84 moreCaused by: org.gradle.internal.resolve.ArtifactResolveException: Could not download gradle-core.jar (com.android.tools.build:gradle-core:3.1.3) at org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver$RemoteRepositoryAccess.resolveArtifact(ExternalResourceResolver.java:506) at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CachingModuleComponentRepository$ResolveAndCacheRepositoryAccess.resolveArtifact(CachingModuleComponentRepository.java:409) at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.BaseModuleComponentRepositoryAccess.resolveArtifact(BaseModuleComponentRepositoryAccess.java:65) at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.memcache.InMemoryCachedModuleComponentRepository$CachedAccess.resolveArtifact(InMemoryCachedModuleComponentRepository.java:124) at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.resolveArtifact(ErrorHandlingModuleComponentRepository.java:171) ... ... 6 moreCaused by: org.gradle.api.resources.ResourceException: Could not get resource ’https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle-core/3.1.3/gradle-core-3.1.3.jar’. at org.gradle.internal.resource.ResourceExceptions.failure(ResourceExceptions.java:74) at org.gradle.internal.resource.ResourceExceptions.getFailed(ResourceExceptions.java:57) at org.gradle.internal.resource.transfer.AccessorBackedExternalResource.withContentIfPresent(AccessorBackedExternalResource.java:146) ... at org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver$RemoteRepositoryAccess.resolveArtifact(ExternalResourceResolver.java:499) ... 27 moreCaused by: javax.net.ssl.SSLException: SSL peer shut down incorrectly at sun.security.ssl.InputRecord.readV3Record(InputRecord.java:596) at sun.security.ssl.InputRecord.read(InputRecord.java:532) at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983) at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:940) at sun.security.ssl.AppInputStream.read(AppInputStream.java:105) at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:139) at org.apache.http.impl.io.SessionInputBufferImpl.read(SessionInputBufferImpl.java:200) ... at org.gradle.internal.resource.transfer.AccessorBackedExternalResource.withContentIfPresent(AccessorBackedExternalResource.java:137) ... 44 more
（编辑）：以下是我的相关文件
build.gradle：
// Top-level build file where you can add configuration options common to all sub-projects/modules.buildscript { ext.kotlin_version = ’1.2.30’ repositories {jcenter()mavenCentral()google() } dependencies {classpath ’com.android.tools.build:gradle:3.1.3’classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"// NOTE: Do not place your application dependencies here; they belong// in the individual module build.gradle files }}allprojects { repositories {jcenter()mavenCentral()google() }}task clean(type: Delete) { delete rootProject.buildDir}
gradle-wrapper.properties：
#Tue Jun 26 21:50:19 MDT 2018distributionBase=GRADLE_USER_HOMEdistributionPath=wrapper/distszipStoreBase=GRADLE_USER_HOMEzipStorePath=wrapper/distsdistributionUrl=http://services.gradle.org/distributions/gradle-4.4-all.zip
gradle.properties：
# Project-wide Gradle settings.# IDE (e.g. Android Studio) users:# Gradle settings configured through the IDE *will override*# any settings specified in this file.# For more details on how to configure your build environment visit# http://www.gradle.org/docs/current/userguide/build_environment.html# Specifies the JVM arguments used for the daemon process.# The setting is particularly useful for tweaking memory settings.org.gradle.jvmargs=-Xmx1536m# When configured,Gradle will run in incubating parallel mode.# This option should only be used with decoupled projects. More details,visit# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects# org.gradle.parallel=true
settings.gradle：
include ’:app’
local.properties：
## This file is automatically generated by Android Studio.# Do not modify this file -- YOUR CHANGES WILL BE ERASED!## This file should *NOT* be checked into Version Control Systems,# as it contains information specific to your local configuration.## Location of the SDK. This is only used by Gradle.# For customization when using a Version Control System,please read the# header note.sdk.dir=C:UsersjddahAppDataLocalAndroidSdk
