本节主要介绍了 app 的 gradle 的构建

settings.gradle

首先看看整个项目的结构，整个项目被分成了三个部分。presentation、domain、data
所以在 Project Setting 的 gradle 要做的事就是把这三个 module 包进来

include ':presentation', ':data', ':domain'

Project : buildl.gradle

整个工程的全局定义，把 versionCode 、versionName等全局定义了，在后续的其他的 gradle 中会用到

allprojects {
    repositories {
        jcenter()
    }
    ext {
        androidApplicationId = 'io.github.xuyushi.jiandan.presentation'
        androidVersionCode = 1
        androidVersionName = "1.0"
    }

}

dependencies.gradle

项目中一般都会引用很多第三方库 ，为了方便修改这些第三方库的依赖，把这些库和库的版本号全部定义在dependencies.gradle中，在需要引用的 gradle 的文件中 apply from: 'dependencies.gradle'即可

在 dependence.gradle 也对三个不同的包做了管理

presentationDependencies = [
            daggerCompiler:     "com.google.dagger:dagger-compiler:${daggerVersion}",
            dagger:             "com.google.dagger:dagger:${daggerVersion}",
            butterKnife:        "com.jakewharton:butterknife:${butterKnifeVersion}",
            recyclerView:       "com.android.support:recyclerview-v7:${recyclerViewVersion}",
            rxJava:             "io.reactivex:rxjava:${rxJavaVersion}",
            rxAndroid:          "io.reactivex:rxandroid:${rxAndroidVersion}",
            javaxAnnotation:    "javax.annotation:jsr250-api:${javaxAnnotationVersion}",
            glide:              "com.github.bumptech.glide:glide:${glideVersion}",
            logger:             "com.orhanobut:logger:${loggerVersion}",
            appcompatV7:        "com.android.support:appcompat-v7:${appcompatV7}",
            design:             "com.android.support:design:${design}"
    ]

    domainDependencies = [
            daggerCompiler:     "com.google.dagger:dagger-compiler:${daggerVersion}",
            dagger:             "com.google.dagger:dagger:${daggerVersion}",
            javaxAnnotation:    "javax.annotation:jsr250-api:${javaxAnnotationVersion}",
            rxJava:             "io.reactivex:rxjava:${rxJavaVersion}",
            logger:             "com.orhanobut:logger:${loggerVersion}"
    ]

    dataDependencies = [
            daggerCompiler:     "com.google.dagger:dagger-compiler:${daggerVersion}",
            dagger:             "com.google.dagger:dagger:${daggerVersion}",
            okHttp:             "com.squareup.okhttp:okhttp:${okHttpVersion}",
            gson:               "com.google.code.gson:gson:${gsonVersion}",
            rxJava:             "io.reactivex:rxjava:${rxJavaVersion}",
            rxAndroid:          "io.reactivex:rxandroid:${rxAndroidVersion}",
            javaxAnnotation:    "javax.annotation:jsr250-api:${javaxAnnotationVersion}",
            androidAnnotations: "com.android.support:support-annotations:${androidAnnotationsVersion}",
            logger:             "com.orhanobut:logger:${loggerVersion}",
            sugar:              "com.github.satyan:sugar:${sugarVersion}",
            retrofit:           "com.squareup.retrofit2:retrofit:${retrofitVersion}",
            retrofitConvertGson:"com.squareup.retrofit2:converter-gson:${retrofitVersion}",
            retrofitAdapter:     "com.squareup.retrofit2:adapter-rxjava:${retrofitVersion}"
    ]

版本号也做了统一的管理

//Android
    androidBuildToolsVersion = "23.0.3"
    androidMinSdkVersion = 15
    androidTargetSdkVersion = 23
    androidCompileSdkVersion = 23

    //Libraries
    daggerVersion = '2.0.2'
    butterKnifeVersion = '7.0.1'
    recyclerViewVersion = '21.0.3'
    rxJavaVersion = '1.0.14'
    rxAndroidVersion = '1.0.1'
    javaxAnnotationVersion = '1.0'
    gsonVersion = '2.3'
    okHttpVersion = '2.5.0'
    androidAnnotationsVersion = '21.0.3'
    retrofitVersion = '2.1.0'
    loggerVersion = '1.14'
    glideVersion = '3.7.0'
    sugarVersion = '1.4'
    appcompatV7 = '23.4.0'
    design = '23.4.0'

presentation

这个是要编译成 apk 的，所以首行必然是 apply plugin: 'com.android.application'


android {
    def globalConfiguration = rootProject.extensions.getByName("ext")

    compileSdkVersion globalConfiguration.getAt("androidCompileSdkVersion")
    buildToolsVersion globalConfiguration.getAt("androidBuildToolsVersion")

    defaultConfig {
        minSdkVersion globalConfiguration.getAt("androidMinSdkVersion")
        targetSdkVersion globalConfiguration.getAt("androidTargetSdkVersion")

        applicationId globalConfiguration.getAt("androidApplicationId")
        versionCode globalConfiguration.getAt("androidVersionCode")
        versionName globalConfiguration.getAt("androidVersionName")
        multiDexEnabled true
    }


    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    //支持lint warning 检查机制
    lintOptions {
        disable 'InvalidPackage'
    }

    packagingOptions {
        exclude 'LICENSE.txt'
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/ASL2.0'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
    }
}

dependencies {
    def presentationDependencies = rootProject.ext.presentationDependencies
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile project(':data')
    compile project(':domain')

    apt presentationDependencies.daggerCompiler
    compile presentationDependencies.dagger
    compile presentationDependencies.butterKnife
    compile presentationDependencies.recyclerView
    compile presentationDependencies.rxJava
    compile presentationDependencies.rxAndroid
    provided presentationDependencies.javaxAnnotation
    compile presentationDependencies.glide
    compile presentationDependencies.logger
    compile presentationDependencies.design
    compile presentationDependencies.appcompatV7

}

可以看到在dependencies中，直接读出了 dependencies.gradle中的设置，

data

data Module 同上。不同的 data Module 是作为一个 Android library 的，所以首行因为

apply plugin: 'com.android.library'

domain

domain 比较特殊，它是一个纯 java 的 module，完全独立于其他两个层，通过接口与另外两个层联系

apply plugin: 'java'

sourceCompatibility = 1.7
targetCompatibility = 1.7

configurations {
    provided
}

sourceSets {
    main {
        compileClasspath += configurations.provided
    }
}

dependencies {
    def domainDependencies = rootProject.ext.domainDependencies
    compile fileTree(dir: 'libs', include: ['*.jar'])

    provided domainDependencies.daggerCompiler
    provided domainDependencies.javaxAnnotation

    compile domainDependencies.dagger
    compile domainDependencies.rxJava
}