无法解决:com.android.support:appcompat-v7:27.+(依赖错误) [英] Failed to resolve: com.android.support:appcompat-v7:27.+ (Dependency Error)

问题描述

我在 Android Studio 中遇到了这个问题.

I am having this issue in Android studio.

Error:Failed to resolve: com.android.support:appcompat-v7:27.+
<a href="install.m2.repo">Install Repository and sync project</a><br><a href="open.dependency.in.project.structure">Show in Project Structure 
dialog</a>

我的 Android Studio 充满错误 android studio cannot identify libraries.整个画面是这样的.

My Android Studio is full of error android studio cannot identify libraries. The whole screen looks like this.

这是我的Gradle代码:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    buildToolsVersion "27.0.1"

    defaultConfig {
        applicationId "com.example.hp.temp"
        minSdkVersion 21
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:27.+'
}

推荐答案

找到根 build.gradle 文件并在 allprojects 标签内添加 google maven repo

Find root build.gradle file and add google maven repo inside allprojects tag

repositories {
        mavenLocal()
        mavenCentral()
        maven {                                  // <-- Add this
            url 'https://maven.google.com/' 
            name 'Google'
        }
    } 

最好使用特定版本而不是可变版本

It's better to use specific version instead of variable version

compile 'com.android.support:appcompat-v7:27.0.0'

<小时>

如果您使用的是 Android Plugin for Gradle 3.0.0 或更高版本

repositories {
      mavenLocal()
      mavenCentral()
      google()        //---> Add this
} 

并以这种方式注入依赖:

and inject dependency in this way :

implementation 'com.android.support:appcompat-v7:27.0.0'

这篇关于无法解决:com.android.support:appcompat-v7:27.+(依赖错误)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！