android Gradle打包修改生成的apk文件名称

直接上代码：

import java.text.SimpleDateFormat

apply plugin: 'com.android.application'

android {
compileSdkVersion 23
buildToolsVersion "23.0.2"

defaultConfig {
applicationId "com.dsy.myapplication"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
applicationVariants.all { variant ->
variant.outputs.each { output ->
def file = output.outputFile
output.outputFile = new File(file.parent,
"myapp-" + defaultConfig.versionName + "-" + buildTime() + ".apk")
//生成的文件名：myapp+版本名+生成日期+.apk
}
}
}

def buildTime() {
def df = new SimpleDateFormat("yyyyMMdd")
df.setTimeZone(TimeZone.getDefault())
return df.format(new Date())
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:support-v4:23.1.1'
}