buildTypes {
    release {
        minifyEnabled false
        signingConfig signingConfigs.debug
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        android.applicationVariants.all{ variant ->
            variant.outputs.each{ output ->
              def outputFile=output.outputFile
                if(outputFile !=null &&outputFile.name.endsWith(".apk"))
                {
                    //defaultConfig.versionCode是apk版本号
                    def filename="apk名字${defaultConfig.versionCode}.apk."
                    output.outputFile=new File(outputFile.parent,filename)
                }

            }

        }
    }

}