依赖管理

1.在项目根目录新建config.gradle文件:

ext {    
  android = [            
   compileSdkVersion: 23,            
   buildToolsVersion: "23.0.2",            
   minSdkVersion    : 14,            
   targetSdkVersion : 23,    
  ]    
  dependencies = [            
   "appcompat-v7"         : "com.android.support:appcompat-v7:23.4.0",            
   "design"               : "com.android.support:design:23.4.0",            
   "retrofit"             : "com.squareup.retrofit2:retrofit:2.1.0",            
   "converter-gson"       : "com.squareup.retrofit2:converter-gson:2.1.0",            
   "adapter-rxjava"       : "com.squareup.retrofit2:adapter-rxjava:2.1.0",            
   "logging-interceptor"  : "com.squareup.okhttp3:logging-interceptor:3.3.1",            
   "rxjava"               : "io.reactivex:rxjava:1.1.8",            
   "rxandroid"            : "io.reactivex:rxandroid:1.2.1",            
   "butterknife"          : "com.jakewharton:butterknife:8.2.1",            
   "butterknife-compiler" : "com.jakewharton:butterknife-compiler:8.2.1",            
   "glide"                : "com.github.bumptech.glide:glide:3.7.0",            
   "glide-transformations": "jp.wasabeef:glide-transformations:2.0.1"    
  ]
}

2.在Project的build.gradle中引用:

apply from: "config.gradle"

3.在Module的build.gradle中引用:

apply plugin: 'com.android.application'
apply plugin: 'android-apt'
android {
    compileSdkVersion rootProject.ext.android.compileSdkVersion
    buildToolsVersion rootProject.ext.android.buildToolsVersion
    defaultConfig {
        applicationId "com.skyzone.netdemomvp"
        minSdkVersion rootProject.ext.android.minSdkVersion
        targetSdkVersion rootProject.ext.android.targetSdkVersion
        versionCode 1
        versionName "1.0"
        buildConfigField 'String', 'API_SERVER_URL', '"http://my.api/"'
        buildConfigField "boolean", "AUTO_UPDATES", "true"
    }
    signingConfigs {//签名的配置
        release {
            storeFile file("***.jks")
            storePassword '***'
            keyAlias '***'
            keyPassword '***'
        }
    }
    buildTypes {
        debug {
            buildConfigField "boolean", "LOG_DEBUG", "true"
            minifyEnabled true
            useProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        release {
            buildConfigField "boolean", "LOG_DEBUG", "false"
            debuggable true
            minifyEnabled true
            useProguard true
            //if need remove unless resource?note:must use shrinkResources with minifyEnabled
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.release
//           resValue "string", "loading", "jax_loading"
            applicationVariants.all { variant ->
                if (variant.buildType.name.equals('release')) {
                    variant.outputs.each { output ->
                        def outputFile = output.outputFile
                        if (outputFile != null && outputFile.name.endsWith('.apk')) {
                            def fileName = "jax_demo_v${defaultConfig.versionName}_${releaseTime()}_${variant.flavorName}.apk"
                            output.outputFile = new File(outputFile.parent, fileName)
                        }
                    }
                }
            }
            //针对很多渠道
            productFlavors.all { flavor ->
                manifestPlaceholders.put("UMENG_CHANNEL_VALUE", name)
            }
        }
    }
    productFlavors {//多渠道打包,命令行打包：gradlew assembleRelease
        xiaomi {
            applicationId 'com.skyzone.netdemomvpxiaomi'
            buildConfigField "boolean", "AUTO_UPDATES", "false"
//            manifestPlaceholders = [UMENG_CHANNEL_VALUE: "xiaomi"]
//            manifestPlaceholders.put("UMENG_CHANNEL_VALUE", 'xiaomi')
        }
        //gradlew assembleGooglePlayRelease
        googleplay {
            applicationId 'com.skyzone.netdemomvpgoogleplay'
        }
    }
    lintOptions {
        abortOnError false
    }
}
dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile rootProject.ext.dependencies["appcompat-v7"]
    compile rootProject.ext.dependencies["design"]
    //net
    compile rootProject.ext.dependencies["retrofit"]
    compile rootProject.ext.dependencies["converter-gson"]
    compile rootProject.ext.dependencies["adapter-rxjava"]
    compile rootProject.ext.dependencies["logging-interceptor"]
    compile rootProject.ext.dependencies["rxjava"]
    compile rootProject.ext.dependencies["rxandroid"]
    //inject
    compile rootProject.ext.dependencies["butterknife"]
    apt rootProject.ext.dependencies["butterknife-compiler"]
    //img
    compile rootProject.ext.dependencies["glide"]
    compile rootProject.ext.dependencies["glide-transformations"]
}
def releaseTime() {    return new Date().format("yyyy-MM-dd", TimeZone.getTimeZone("UTC"))}

签名打包

//打包所有渠道的debug apk
gradlew assembleDebug
//打包所有渠道的release apk
gradlew assembleRelease
//仅打包GooglePlay渠道的release apk
gradlew assembleGooglePlayRelease
//仅打包GooglePlay渠道的debug apk
gradlew assembleGooglePlayDebug
//打包GooglePlay渠道的debug/release apk
gradlew assembleGooglePlay

Note:gradlew assemblerelease could not find tools.jar Solve:设置环境变量JAVA_HOME,重新启动。