How to read JSON from Url using kotlin Android?

I have a fragment_X (class + layout) where i would like to read the online Json file, (you also able to read txt file), and show the content to TextView.

==> NOTE: give application have a right to access internet in Manifest.

class Fragment_X: Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_X, container, false)

    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        if(isNetworkAvailable()) {
            val myRunnable = Conn(mHandler)
            val myThread = Thread(myRunnable)
            myThread.start()
        }
    }


    // create a handle to add message
    private val mHandler: Handler = object : Handler(Looper.getMainLooper()) {
        override fun handleMessage(inputMessage: Message) { if (inputMessage.what == 0) {
            textView.text = inputMessage.obj.toString() }
        } }

    // first, check if network is available.
    private fun isNetworkAvailable(): Boolean { val cm = requireActivity().getSystemService(
        Context.CONNECTIVITY_SERVICE
    ) as ConnectivityManager
        return cm.activeNetworkInfo?.isConnected == true
    }


    //create a worker with a Handler as parameter
    class Conn(mHand: Handler): Runnable {
        val myHandler = mHand
        override fun run() {
            var content = StringBuilder()
            try {
                // declare URL to text file, create a connection to it and put into stream.
                val myUrl = URL("http:.........json")  // or URL to txt file
                val urlConnection = myUrl.openConnection() as HttpURLConnection
                val inputStream = urlConnection.inputStream

                // get text from stream, convert to string and send to main thread.
                val allText = inputStream.bufferedReader().use { it.readText() }
                content.append(allText)
                val str = content.toString()
                val msg = myHandler.obtainMessage()
                msg.what = 0
                msg.obj = str
                myHandler.sendMessage(msg)
            } catch (e: Exception) {
                Log.d("Error", e.toString())
            }
        }

    }

}

You can use RequestQueue: https://developer.android.com/training/volley/requestqueue

val textView = findViewById<TextView>(R.id.text)
// ...

// Instantiate the RequestQueue.
val queue = Volley.newRequestQueue(this)
val url = "https://www.google.com"

// Request a string response from the provided URL.
val stringRequest = StringRequest(Request.Method.GET, url,
        Response.Listener<String> { response ->
            // Display the first 500 characters of the response string.
            textView.text = "Response is: ${response.substring(0, 500)}"
        },
        Response.ErrorListener { textView.text = "That didn't work!" })

// Add the request to the RequestQueue.
queue.add(stringRequest)