android - 使用 Gradle 插件 3.1.2 改造 2.4.0

Question

我有一个非常简单的问题。我是一名 Android 开发人员，在休假 6 个月后重返开发岗位，和往常一样，一切都发生了明显的变化。这是我的问题:

• 在 Android Studio 3.1.2 上开始一个新的 Android 项目
• 默认的 Gradle 插件是 3.1.2
• 在应用的 build.gradle 中添加了 retrofit2 依赖

实现 'com.squareup.retrofit2:retrofit:2.4.0'

• 开始gradle同步

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.squareup.retrofit2:retrofit:2.4.0. Open File Show Details

Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.squareup.retrofit2:retrofit:2.4.0. Open File Show Details

Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.squareup.retrofit2:retrofit:2.4.0. Open File Show Details

Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.squareup.retrofit2:retrofit:2.4.0. Open File Show Details

Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.squareup.retrofit2:retrofit:2.4.0. Open File Show Details

我阅读了整篇关于 Gradle 插件 3 迁移的文章。这没有帮助。

项目build.gradle

// 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:3.1.2'
        // 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
}

应用级build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    buildToolsVersion "27.0.3"
    defaultConfig {
        applicationId "com.xyz.xyz"
        minSdkVersion 15
        targetSdkVersion 27
        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-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
    implementation 'com.squareup.retrofit2:retrofit:2.4.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

Answer 1

如果您的 PC 在某些代理上运行，请在 android studio 中添加代理或检查您的互联网连接。对于代理，请按照以下步骤操作:文件 -> 设置 -> 外观和行为 -> 系统设置 -> HTTP 代理添加您的代理

否则请检查您的互联网连接