1.使用阿里云镜像

1.位置：

2代码：

// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript {     repositories {         maven{ url 'https://maven.aliyun.com/nexus/content/groups/public/' }         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 {         maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }         maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter' }         maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }         maven { url 'https://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }         google()         jcenter()     } }  task clean(type: Delete) {     delete rootProject.buildDir } 

依赖

1位置：

2.代码

apply plugin: 'com.android.application'  android {     compileSdkVersion 29     buildToolsVersion "29.0.3"      defaultConfig {         applicationId "com.example.examplepermissionsettinginterface"         minSdkVersion 16         targetSdkVersion 29         versionCode 1         versionName "1.0"          testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"     }      buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'         }     }     compileOptions {         sourceCompatibility 1.8         targetCompatibility 1.8     } }  dependencies {     implementation fileTree(dir: "libs", include: ["*.jar"])     implementation 'androidx.appcompat:appcompat:1.1.0'     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'     testImplementation 'junit:junit:4.12'     androidTestImplementation 'androidx.test.ext:junit:1.1.1'     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'     //黄油     implementation 'com.jakewharton:butterknife:10.2.1'     annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.1' }