android - 在android studio中添加库？

Question

当我想添加这个库

implementation 'com.github.bumptech.glide:glide:4.9.0'

我的 android 出现这个错误:

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.github.bumptech.glide:glide:4.9.0.

这是我的应用模块

apply plugin: 'com.android.application'
android {
compileSdkVersion 27
defaultConfig {
    applicationId "com.example.mahdi.chatapp"
    minSdkVersion 16
    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(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.google.firebase:firebase-auth:16.1.0'
    implementation 'com.google.firebase:firebase-config:16.3.0'
    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'
    implementation 'com.android.support:support-v4:27.1.1'
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.google.firebase:firebase-core:16.0.7'
    implementation 'com.google.firebase:firebase-database:16.0.6'
    implementation 'com.android.support:cardview-v7:27.1.1'
    implementation 'com.rengwuxian.materialedittext:library:2.1.4'
    implementation 'de.hdodenhof:circleimageview:3.0.0'
    implementation 'com.github.bumptech.glide:glide:4.9.0'
}

apply plugin: 'com.google.gms.google-services'

Answer 1

你有没有在Gradle文件中加入这段代码

repositories {
  mavenCentral()
  google()
}