android - Gradle项目同步失败(相关性错误)

Question

添加新的依赖项时，错误显示为:

C:\Users\Davud\Desktop\android projects\SaySistemleri\app\build.gradle Error:Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:12.0.1. Open File
Show Details Error:Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:12.0.1. Open File
Show Details Error:Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:12.0.1. Open File
Show Details Error:Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:12.0.1. Open File
Show Details Error:Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:12.0.1. Open File
Show Details

Gradle 代码:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.example.davud.numberrepresentator"
        minSdkVersion 14
        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(include: ['*.jar'], dir: 'libs')
    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'
    compile 'com.android.support:design:26.1.0'
    implementation 'com.google.android.gms:play-services-ads:12.0.1'
}

Answer 1

在顶层build.gradle中添加以下行的网址maven.google.com
allprojects { repositories { jcenter() maven { url 'https://maven.google.com' } } }