AsyncTask takes forever to fetch result - php

Question

I am making an android application where I need to fetch data from an online database. The online database has 3 columns, Date, Time and Varchar(255).
Here is my PHP code:
<?php
require "connection.php";
if($result = mysqli_query($conn, "select * from `xuberance_updates`")) {
while($row = mysqli_fetch_assoc($result)) {
echo $row["date"].",".$row["time"].",".$row["updates"].";";
}
}
?>
And here is my kotlin code in android:
class RefreshTask(private val alertDialog: AlertDialog) :
AsyncTask<String, Void, String>() {
override fun onPreExecute() {
...
alertDialog.show()
...
}
override fun doInBackground(vararg params: String?): String? {
val url = URL("https://.../show_update.php")
val httpURLConnection = url.openConnection() as HttpURLConnection
httpURLConnection.doInput = true
httpURLConnection.doOutput = true
httpURLConnection.requestMethod = "POST"
httpURLConnection.connect()
val reader = BufferedReader(InputStreamReader(httpURLConnection.inputStream, "UTF-8"))
var line = reader.readLine()
val result = StringBuilder()
while (line != null) {
result.append(line)
line = reader.readLine()
}
reader.close()
httpURLConnection.disconnect()
return result.toString()
}
override fun onPostExecute(result: String?) {
alertDialog.dismiss()
...
}
...
}
When I start the AsyncTask, The dialog appears. But it never gets dismissed. The onPostExecute(result: String?) method is never reached. How to fix this?
Edit: Sometimes, It successfully reaches the onPostExecute(result: String?) method. But most of the times, I need to wait for 2 or more minutes to get to that method.

Answer 1

Use this library to make network calls. Very simple yet efficient.
http://loopj.com/android-async-http/

Answer 2

this should be culprit
while (line != null) {
result.append(line)
line = reader.readLine()
}