post request html android

1    public class CallAPI extends AsyncTask<String, String, String> {
2
3        public CallAPI(){
4            //set context variables if required
5        }
6
7        @Override
8        protected void onPreExecute() {
9            super.onPreExecute();
10        }
11
12         @Override
13         protected String doInBackground(String... params) {
14            String urlString = params[0]; // URL to call
15            String data = params[1]; //data to post
16            OutputStream out = null;
17
18            try {
19                URL url = new URL(urlString);
20                HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
21                out = new BufferedOutputStream(urlConnection.getOutputStream());
22
23                BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, "UTF-8"));
24                writer.write(data);
25                writer.flush();
26                writer.close();
27                out.close();
28
29                urlConnection.connect();
30            } catch (Exception e) {
31                System.out.println(e.getMessage());
32            }
33        }
34    }