Android Studio 3.0指定apk出力

buildTypes {
    release {
        minifyEnabled false
        signingConfig signingConfigs.debug
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        android.applicationVariants.all { variant ->
            variant.outputs.all { output ->
                def outputFile = output.outputFile
                if (outputFile != null && outputFile.name.endsWith('.apk')) {

                    // apk  -   -    -    .apk
                    outputFileName= "apk  -${defaultConfig.versionCode}-${defaultConfig.versionName}-${releaseTime() }.apk"

                }
            }
        }
    }

}

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