在将 android studio 2.3 更新到 3.0 之后，我遇到了很多错误，所以我做了很多工作，但没有成功

错误:无法解析配置“:app:debugCompileClasspath”的所有文件。

Could not resolve com.android.support:appcompat-v7:26.1.0. Required by: project :app Could not resolve com.android.support:appcompat-v7:26.1.0. Could not parse POM https://dl.google.com/dl/android/maven2/com/android/support/appcompat-v7/26.1.0/appcompat-v7-26.1.0.pom Already seen doctype. Could not resolve com.android.support:appcompat-v7:26.1.0. Could not get resource 'https://jcenter.bintray.com/com/android/support/appcompat-v7/26.1.0/appcompat-v7-26.1.0.pom'. Could not HEAD 'https://jcenter.bintray.com/com/android/support/appcompat-v7/26.1.0/appcompat-v7-26.1.0.pom'. Connect to jcenter.bintray.com:443 [jcenter.bintray.com/108.168.243.150] failed: Connection timed out: connect

gradle 包装属性

#Mon Nov 06 17:20:27 IRST 2017
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip 

我的gradle(模块应用)

 apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "curlpagetutorial.example.com.mydd"
        minSdkVersion 19
        targetSdkVersion 26
        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'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

渐变

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

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'


        // 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
}

新错误

要求: 项目:应用

Could not resolve com.android.support:appcompat-v7:26.1.0. Could not parse POM https://dl.google.com/dl/android/maven2/com/android/support/appcompat-v7/26.1.0/appcompat-v7-26.1.0.pom Already seen doctype.

Could not resolve com.android.support:appcompat-v7:26.1.0.

Could not resolve com.android.support.test:runner:1.0.1.

Could not resolve com.android.support.test.espresso:espresso-core:3.0.1.

我被困在这里很长时间了，请帮助我

最佳答案

我遇到了同样的问题。 最后，我使用外部 gradle 安装修复了它。为此，您需要配置 File->Settings->Build,Execution and deployments->Gradle 勾选 -> 使用本地 gradle 分发 选择 gradle home 安装。

如果您使用的是公司连接，您还必须配置 gradle 代理属性配置或在文件夹“/Users/user/.gradle 中创建文件 gradle.properties ":

#http proxy setup
systemProp.http.proxyHost=url
systemProp.http.proxyPort=port
systemProp.http.nonProxyHosts=*.nonproxyrepos.com|localhost

#https proxy setup
systemProp.https.proxyHost=url
systemProp.https.proxyPort=port
systemProp.https.nonProxyHosts=*.nonproxyrepos.com|localhost

就是这样!

关于android - Gradle 连接超时，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47138429/