Android 如何使用kotlin下载.csv文件并读取文本

现在我可以下载.csv文件了，但下载时显示了两个.csv文件

 private fun getRequest(){
        val url = "https://od.moi.gov.tw/adm/veh/query_veh?_m=query&vehType=B&vehNumber=AA-000"
        val request = DownloadManager
            .Request(Uri.parse(url))
            .setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "Open_data")
            .setAllowedOverMetered(true)
        val csv = getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
        myDownLoadId = csv.enqueue(request)
    }

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这是我的密码。如何读取.csv文件？如何更改代码？

我已尝试打开csv，但无法读取。它使用什么编码？这种编码是“UTF-8”

var br = object : BroadcastReceiver(){
            override fun onReceive(context: Context?, intent: Intent?) {
                val id = intent?.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1)
                if(id == myDownLoadId){
                    Toast.makeText(applicationContext, "Data Download Complete", Toast.LENGTH_LONG).show()
                    val Fin = FileInputStream(Environment.DIRECTORY_DOWNLOADS + "/upload")
                }
            }
        }
        registerReceiver(br, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE))

        button.setOnClickListener{
            getRequest()
        }