Gradle

更目录build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {                                                                                       //构建脚本引用
    repositories {                                                                                  //插件仓库配置
        google()
        jcenter()                                                                                   //Jcenter() 本质是一个Maven仓库
    }
    dependencies {                                                                                  //依赖插件
        classpath 'com.android.tools.build:gradle:3.1.4'                                            //Google Android Gradle 插件
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {                                                                                       //全部项目配置
    repositories {                                                                                  //全部项目引用的基础仓库配置
        google()
        jcenter(）
    }
}

task clean(type: Delete) {                                                                          //声明任务
    delete rootProject.buildDir                                                                     //删除主路径buildDiar文件夹
}

app 的build.gradle

apply plugin: 'com.android.application'                                                                  //引入编译构建Gradle插件

android {
    compileSdkVersion 28                                                                                 //编译的SDK
    defaultConfig {                                                                                      //默认配置
        applicationId "com.igp.sex"                                                                      //应用程式ID
        minSdkVersion 15                                                                                 //最小支持版本
        targetSdkVersion 28                                                                              //支持的目标版本
        versionCode 1                                                                                    //版本号
        versionName "1.0"                                                                                //版本名
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"                       //测试脚本
    }
    buildTypes {                                                                                         //构建类型
        release {                                                                                        //release 版本配置
            minifyEnabled false                                                                          //不使用混淆
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'  //混淆文件
        }
    }
}

dependencies {                                                                                           //依赖插件
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    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'
}