android - Android Studio:互联网连接被拒绝错误

Question

每当我尝试在Android Studio中打开项目或创建新项目时，都会遇到Gradle Project Sync错误。 Android Studio显示错误，指示“拒绝连接到互联网” 。我在Stack Overflow和Android Developers网站上搜索了可能的解决方案，但未成功。

我尝试了以下帖子和文档中提供的所有可能的解决方案，但没有一个适合我。

Create new project on Android, Error: Studio Unknown host 'services.gradle.org'

Android Studio Connection Refused

https://developer.android.com/studio/troubleshoot.html

Android Studio internet connection

这是build.gradle和gradle.properties文件:

build.gradle-

// 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:3.1.1'


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

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

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

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=-Djava.net.preferIPv4Stack=true
systemProp.https.proxyHost=localhost
systemProp.https.proxyPort=8080

# 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

当我使用localhost作为我的ProxyHost时，它抛出一个错误，说 拒绝连接:connect

有人可以指导我解决此错误吗？提前致谢。

Answer 1

此问题导致先前安装的gradle包装器不是固有的网络访问权限。您可以通过让Android Studio管理gradle包装器来解决此问题；转到“文件/设置/构建执行部署/版本”，然后选中“使用本地gradle分发”。

之后，在Gradle Home中将位置放入gradle目录-此时gradle 4.4是最新的；即'C:\ Program Files \ Android \ Android Studio \ gradle \ gradle-4.4'

并在“gradle.properties”中修复或注释掉那些代理设置:

#systemProp.http.proxyHost=127.0.0.1
#systemProp.https.proxyHost=127.0.0.1

#systemProp.http.proxyPort=1080
#systemProp.https.proxyPort=1080