hide Alert Dialog in kotlin - kotlin

Question

My current project downloading data from a server time I want to display a progress bar so the user knows what is going on. I have a simple alert dialog , l am try to add alert dialog when data json loading for user . when l launching app the alert dialog stay stick on screen even if the data loaded already and doesn't hide .
AsyncTask code :
inner class Arr : AsyncTask<String, String, String>(){
val progressDialog = AlertDialog.Builder(this#MainActivity)
val dialogView = layoutInflater.inflate(R.layout.progress_dialog,null)
val message = dialogView.findViewById<TextView>(R.id.message_id)
val dialog = progressDialog.create()
override fun onPreExecute() {
super.onPreExecute()
progressDialog.setMessage("loading")
progressDialog.setCancelable(false)
progressDialog.show()
}
// for build connection
override fun doInBackground(vararg url: String?): String{
var text : String
val connection = URL(url[0]).openConnection() as HttpURLConnection
try {
connection.connect()
text = connection.inputStream.use { it.reader().use{reader -> reader.readText()} }
} finally{
connection.disconnect()
}
return text
}
override fun onPostExecute(result: String?) {
super.onPostExecute(result)
handleJson(result)
dialog.dismiss()
}
override fun onProgressUpdate(vararg text: String?) {
dialog.dismiss()
}
private fun handleJson (jsonString: String?){
dialog.dismiss()
val jsonObj = JSONObject(jsonString)
val result = jsonObj.getJSONObject("result")
val response = result.getJSONObject("response")
val airport = response.getJSONObject("airport")
val pluginData = airport.getJSONObject("pluginData")
val schedule = pluginData.getJSONObject("schedule")
val arrivals = schedule.getJSONObject("arrivals")
// val data = arrivals.getJSONObject("data")
val jsonArray = JSONArray(arrivals.get("data").toString())
val list = ArrayList<FlightShdu>()
var x = 0
while (x < jsonArray.length()){
val jsonObject = jsonArray.getJSONObject(x)
list.add(FlightShdu(
jsonObject.getJSONObject("flight").getJSONObject("identification").getJSONObject("number").getString("default"),
jsonObject.getJSONObject("flight").getJSONObject("airline").getString("name"),
jsonObject.getJSONObject("flight").getJSONObject("status").getString("text"),
jsonObject.getJSONObject("flight").getJSONObject("airline").getJSONObject("code").getString("icao"),
jsonObject.getJSONObject("flight").getJSONObject("time").getJSONObject("scheduled").getString("arrival")
))
x++
}
list.forEach(::println)
val adapter = ListAdapte(this#MainActivity,list)
flight_arrivel_list.adapter = adapter
}
} //
any solution please ?

Answer 1

Change to this:
override fun onPreExecute() {
super.onPreExecute()
dialog.setMessage("loading")
dialog.setCancelable(false)
dialog.show()
}
and hide it with:
dialog.dismiss();
you must refer to the AlertDialog object and not the AlertDialog.Builder.

Answer 2

In your onPreExecute()
override fun onPreExecute() {
...
progressDialog.show()
}
But in onPostExecute() you call different dialog to dismiss
override fun onPostExecute(result: String?) {
...
dialog.dismiss()
}
So you need to call progressDialog.dismiss() in onPostExecute().

Answer 3

progressDialog.dismiss() instead of dialog.dismiss()