TODO-MVP

Android-代码结构图

由上图可知，项目分层1个app目录，4个测试目录
app目录分为：

4个测试目录分别是：
androidTest: UI层测试
androidTestMock: UI层测试，mock数据支持
test:业务层单元测试
mock:业务层单元测试,mock数据支持

首先，我们来看下build.gradle(Module:app)文件

apply plugin: 'com.android.application'

android {
    compileSdkVersion rootProject.ext.compileSdkVersion
    buildToolsVersion rootProject.ext.buildToolsVersion

    defaultConfig {
        applicationId "com.example.android.architecture.blueprints.todomvp"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'
    }

    buildTypes {
        debug {
            minifyEnabled true
            // Uses new built-in shrinker http://tools.android.com/tech-docs/new-build-system/built-in-shrinker
            useProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            testProguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguardTest-rules.pro'
        }

        release {
            minifyEnabled true
            useProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            testProguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguardTest-rules.pro'
        }
    }

    // If you need to add more flavors, consider using flavor dimensions.
    productFlavors {
        mock {
            applicationIdSuffix = ".mock"
        }
        prod {

        }
    }

    // Remove mockRelease as it's not needed.
    android.variantFilter { variant ->
        if(variant.buildType.name.equals('release')
                && variant.getFlavors().get(0).name.equals('mock')) {
            variant.setIgnore(true);
        }
    }

    // Always show the result of every unit test, even if it passes.
    testOptions.unitTests.all {
        testLogging {
            events 'passed', 'skipped', 'failed', 'standardOut', 'standardError'
        }
    }
}

/*
 Dependency versions are defined in the top level build.gradle file. This helps keeping track of
 all versions in a single place. This improves readability and helps managing project complexity.
 */
dependencies {
    // App's dependencies, including test
    compile "com.android.support:appcompat-v7:$rootProject.supportLibraryVersion"
    compile "com.android.support:cardview-v7:$rootProject.supportLibraryVersion"
    compile "com.android.support:design:$rootProject.supportLibraryVersion"
    compile "com.android.support:recyclerview-v7:$rootProject.supportLibraryVersion"
    compile "com.android.support:support-v4:$rootProject.supportLibraryVersion"
    compile "com.android.support.test.espresso:espresso-idling-resource:$rootProject.espressoVersion"
    compile "com.google.guava:guava:$rootProject.guavaVersion"

    // Dependencies for local unit tests
    testCompile "junit:junit:$rootProject.ext.junitVersion"
    testCompile "org.mockito:mockito-all:$rootProject.ext.mockitoVersion"
    testCompile "org.hamcrest:hamcrest-all:$rootProject.ext.hamcrestVersion"

    // Android Testing Support Library's runner and rules
    androidTestCompile "com.android.support.test:runner:$rootProject.ext.runnerVersion"
    androidTestCompile "com.android.support.test:rules:$rootProject.ext.runnerVersion"

    // Dependencies for Android unit tests
    androidTestCompile "junit:junit:$rootProject.ext.junitVersion"
    androidTestCompile "org.mockito:mockito-core:$rootProject.ext.mockitoVersion"
    androidTestCompile 'com.google.dexmaker:dexmaker:1.2'
    androidTestCompile 'com.google.dexmaker:dexmaker-mockito:1.2'

    // Espresso UI Testing
    androidTestCompile "com.android.support.test.espresso:espresso-core:$rootProject.espressoVersion"
    androidTestCompile ("com.android.support.test.espresso:espresso-contrib:$rootProject.espressoVersion")
    androidTestCompile "com.android.support.test.espresso:espresso-intents:$rootProject.espressoVersion"

    // Resolve conflicts between main and test APK:
    androidTestCompile "com.android.support:support-annotations:$rootProject.supportLibraryVersion"
    androidTestCompile "com.android.support:support-v4:$rootProject.supportLibraryVersion"
    androidTestCompile "com.android.support:recyclerview-v7:$rootProject.supportLibraryVersion"
}

在defaultConfig中

testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'

是用来

在buildTypes中，relase模式下启用了混淆，我们来分析下下面两行代码：

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
testProguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguardTest-rules.pro'

proguard-rules.pro 文件代码：

# Some methods are only called from tests, so make sure the shrinker keeps them.
-keep class com.example.android.architecture.blueprints.** { *; }

-keep class android.support.v4.widget.DrawerLayout { *; }
-keep class android.support.test.espresso.IdlingResource { *; }
-keep class com.google.common.base.Preconditions { *; }

# For Guava:
-dontwarn javax.annotation.**
-dontwarn javax.inject.**
-dontwarn sun.misc.Unsafe

# Proguard rules that are applied to your test apk/code.
-ignorewarnings

-keepattributes *Annotation*

-dontnote junit.framework.**
-dontnote junit.runner.**

-dontwarn android.test.**
-dontwarn android.support.test.**
-dontwarn org.junit.**
-dontwarn org.hamcrest.**
-dontwarn com.squareup.javawriter.JavaWriter
# Uncomment this if you use Mockito
-dontwarn org.mockito.**

proguard-rules.pro 文件代码：

# Proguard rules that are applied to your test apk/code.
-ignorewarnings

-keepattributes *Annotation*

-dontnote junit.framework.**
-dontnote junit.runner.**

-dontwarn android.test.**
-dontwarn android.support.test.**
-dontwarn org.junit.**
-dontwarn org.hamcrest.**
-dontwarn com.squareup.javawriter.JavaWriter
# Uncomment this if you use Mockito
-dontwarn org.mockito.**

在上面的build文件中，发现有比较多的
rootProject.ext.compileSdkVersion
rootProject.ext.buildToolsVersion、
rootProject.supportLibraryVersion
rootProject.espressoVersion
是因为？
我们来看下build.gradle(Project:todoapp)文件：

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.2'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

// Define versions in a single place
ext {
    // Sdk and tools
    minSdkVersion = 10
    targetSdkVersion = 22
    compileSdkVersion = 23
    buildToolsVersion = '23.0.2'

    // App dependencies
    supportLibraryVersion = '23.4.0'
    guavaVersion = '18.0'
    junitVersion = '4.12'
    mockitoVersion = '1.10.19'
    powerMockito = '1.6.2'
    hamcrestVersion = '1.3'
    runnerVersion = '0.4.1'
    rulesVersion = '0.4.1'
    espressoVersion = '2.2.1'
}

下面这段代码：

task clean(type: Delete) {    delete rootProject.buildDir}

前面铺垫了这么久，终于到代码时间了

代码结构

参考文章：
InfoQ：Android官方MVP架构示例项目解析