How to fetch data from an URL in Android?

Even though it's a duplicate I am going to answear. The best way to do this is to use asynchronous method:

class MyTask extends AsyncTask<Integer, Integer, String> {
    @Override
    protected String doInBackground(Integer... params) {
        for (; count <= params[0]; count++) {
            try {
                Thread.sleep(1000);

                publishProgress(count);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        try {
              JSONObject response = getJSONObjectFromURL("your http link"); // calls method to get JSON object 

        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return "Task Completed.";
    }
    @Override
    protected void onPostExecute(String result) {
        progressBar.setVisibility(View.GONE);



    }
    @Override
    protected void onPreExecute() {
        txt.setText("Task Starting...");
    }
    @Override
    protected void onProgressUpdate(Integer... values) {
        txt.setText("Running..."+ values[0]);
        progressBar.setProgress(values[0]);
    }
}

And here is the class to get JSON from http and parse it. When calling the method pass in the url you wish to get the json object from.

 public static JSONObject getJSONObjectFromURL(String urlString) throws IOException, JSONException {

    HttpURLConnection urlConnection = null;

    URL url = new URL(urlString);

    urlConnection = (HttpURLConnection) url.openConnection();

    urlConnection.setRequestMethod("GET");
    urlConnection.setReadTimeout(10000 /* milliseconds */);
    urlConnection.setConnectTimeout(15000 /* milliseconds */);

    urlConnection.setDoOutput(true);

    urlConnection.connect();

    BufferedReader br=new BufferedReader(new InputStreamReader(url.openStream()));

    char[] buffer = new char[1024];

    String jsonString = new String();

    StringBuilder sb = new StringBuilder();
    String line;
    while ((line = br.readLine()) != null) {
        sb.append(line+"\n");
    }
    br.close();

    jsonString = sb.toString();

    System.out.println("JSON: " + jsonString);
    urlConnection.disconnect();

    return new JSONObject(jsonString);
}