Gradle sync failed “read time out“_gradle sync failed: read timed out

在使用Android Studio进行开发时，经常会碰到以下问题：在Gradle进行Project Sync时由于需要从国外网站下载jar包文件，当下载发生中断时就会导致Sync失败。解决方法之一是使用国内阿里云镜像，具体步骤如下：

1. 修改build.gradle文件：

// 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:4.0.0"

        // 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
}
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为

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        maven { url 'https://maven.aliyun.com/repository/public/' }
        maven { url 'https://maven.aliyun.com/repository/google/'}
        maven { url 'https://maven.aliyun.com/repository/jcenter/'}
        mavenLocal()
        mavenCentral()

    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.0.0"

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

allprojects {
    repositories {
        maven { url 'https://maven.aliyun.com/repository/public/' }
        maven { url 'https://maven.aliyun.com/repository/google/'}
        maven { url 'https://maven.aliyun.com/repository/jcenter/'}
        mavenLocal()
        mavenCentral()
        
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}
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2. 重新Sync工程

3. 此外还可以通过修改文件gradle.properties中org.gradle.jvmargs来调整容许网络延时来提高Sync成功率

org.gradle.jvmargs=-Xmx1536m -Dorg.gradle.internal.http.connectionTimeout=120000 -Dorg.gradle.internal.http.socketTimeout=120000
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4. Gradle配置指南参考阿里云网站。¹