Gradle 多渠道、多applicationId控制

因为项目需要，需要做到有多个渠道的前提下，针对debug 版要求每个版本的id不同，以便于安装于一部手机进行测试，但是release版的id 需要相同（即为默认的id）。因此，对于能自动控制就坚决不手动处理的我来说，自然是想通过Gradle 这一工具去实现。
由于Gradle 比较深入的使用方法比较少，这中间走了不少坑，不过最后功夫不负有心人，还是顺利解决了，因此，记下来，以免忘记。
整个清单文件如下：

apply plugin: 'com.android.application'
//apply plugin: 'android-apt'
apply plugin: 'com.dodola.rocoofix'
apply plugin: 'com.antfortune.freeline'

def releaseTime() {
    return new Date().format("yyyyMMdd", TimeZone.getTimeZone("UTC"))
}

android {
    compileSdkVersion 25
    buildToolsVersion '26.0.2'
    defaultConfig {
        applicationId "com.google.test"
        minSdkVersion 16
        targetSdkVersion 20
        versionCode 1
        versionName "1.0.0." + getSvnRevisionNumber()
        multiDexEnabled true
        ndk {
            abiFilters "armeabi", "armeabi-v7a"
        }
    }

    flavorDimensions "versionCode"
    productFlavors {
        ChangSha {
            versionCode android.defaultConfig.versionCode
            manifestPlaceholders = [UMENG_CHANNEL_VALUE: "ChangSha"]
            resValue("string", "app_name", "长沙") 
        }
        SanMenXia {
            versionCode android.defaultConfig.versionCode
            manifestPlaceholders = [UMENG_CHANNEL_VALUE: "SanMenXia"]
            resValue("string", "app_name", "三门峡")
        }
        XinYang {
            versionCode android.defaultConfig.versionCode
            manifestPlaceholders = [UMENG_CHANNEL_VALUE: "XinYang"]
            resValue("string", "app_name", "信阳")
        }
        LuAn {
            versionCode android.defaultConfig.versionCode
            manifestPlaceholders = [UMENG_CHANNEL_VALUE: "LuAn"]
            resValue("string", "app_name", "六安")
        }

    }

    applicationVariants.all { variant ->
        def mergedFlavor = variant.mergedFlavor
        def buildType = variant.buildType.name
        if (buildType == "debug") {
            switch (variant.flavorName) {
                case "ChangSha":
                    mergedFlavor.setApplicationId("com.google.changsha")
                    break
                case "SanMenXia":
                    mergedFlavor.setApplicationId("com.google.sanmenxia")
                    break
                case "XinYang":
                    mergedFlavor.setApplicationId("com.google.xinyang")
                    break
                case "LuAn":
                    mergedFlavor.setApplicationId("com.google.luan")
                    break
            }
        }
    }

    buildTypes {
        release {
            //混淆开启
            minifyEnabled false
            //Zipalign优化
            zipAlignEnabled true
            // 移除无用的resource文件
            shrinkResources false
            resValue("string", "app_name", "测试城市")
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            buildConfigField("String", "WEBSERVICE_URL", '"http://www.baidu.com/"')
            applicationVariants.all { variant ->
                variant.outputs.all { output ->
                    def outputFile = output.outputFileName
                    if (outputFile != null && outputFileName.endsWith('.apk')) {
                        def fileName = "TEST_v${defaultConfig.versionName}_" +
//                                ".${getSvnRevisionNumber()}_" +
                                "${defaultConfig.versionCode}_" +
//                                "${defaultConfig.manifestPlaceholders.UMENG_CHANNEL_VALUE}_" +
                                "${variant.productFlavors[0].name}_" +
                                "${releaseTime()}_${variant.buildType.name}.apk"
                        output.outputFileName = new File(fileName)
                    }
                }
            }
        }
        debug {
            //混淆开启
            minifyEnabled false
            //Zipalign优化
            zipAlignEnabled false
            // 移除无用的resource文件
            shrinkResources false
            buildConfigField("String", "WEBSERVICE_URL", '"http://www.baidu.com/"')
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets {
        main {
//            jniLibs.srcDirs = ['libs']
            res.srcDirs =
                    [
                            'src/main/res/layouts/question',
                            'src/main/res/layouts/signup',
                            'src/main/res/layouts/business',
                            'src/main/res/layouts/mine',
                            'src/main/res/layouts',
                            'src/main/res'
                    ]
        }
    }
    dexOptions {
//        incremental true
        javaMaxHeapSize "4g"
        preDexLibraries false
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }
    productFlavors {
    }
}

repositories {
    flatDir {
        dirs 'libs'
    }
    maven {
        url 'https://maven.google.com/'
        name 'Google'
    }
}
dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:'
    compile 'com.alibaba:fastjson:1.2.12'
    compile 'com.android.support:multidex:1.0.1'
    compile 'com.loopeer.android.thirdparty.pulltorefresh:Android-PullToRefresh:2.1.1'
    compile 'com.android.support:recyclerview-v7:'
    //https://github.com/JakeWharton/butterknife
    compile 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
    compile 'org.greenrobot:eventbus:3.1.1'
    compile 'com.dodola:rocoo:1.1'
    compile files('libs/sun.misc.BASE64Decoder.jar')
    compile 'com.github.bumptech.glide:glide:3.7.0'
    compile 'fr.baloomba:viewpagerindicator:2.4.2'
    compile 'com.squareup.okhttp:okhttp:2.7.5'
    compile 'org.jbundle.util.osgi.wrapped:org.jbundle.util.osgi.wrapped.org.apache.http.client:4.1.2'
    //添加友盟库
    compile 'com.umeng.analytics:analytics:latest.integration'
    compile 'com.squareup.wire:wire-runtime:2.1.2'
    // 对话框https://github.com/afollestad/material-dialogs
    compile 'com.afollestad.material-dialogs:core:0.9.4.5'
}

def getSvnRevisionNumber() {
    return 'svn info --show-item revision'.execute().text.trim()
}

以上就是所有的实现，希望能帮助到有需要的人，如果看代码还有疑问的可以在评论区留言，看到了我会进行回复。