Android Application的Gradle说明

//引入插件
apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.0"
    defaultConfig {
        applicationId "com.example.myapplication"
        minSdkVersion 28
        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'
        }
    }
}

dependencies {
    //implementation定义项目主源代码的依赖

    //配置依赖libs目录下的所有jar包
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    //配置从中央仓库下载依赖jar包
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    //testImplementation定义项目测试代码（test目录下的代码）的依赖
    testImplementation 'junit:junit:4.12'
    //androidTestImplementation定义androidTest目录下的代码依赖
    androidTestImplementation 'androidx.test:runner:1.2.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}