ExampleAsync.java

public void sendRequests() {
        new DataSender().execute();
    }

    public static class DataSender extends AsyncTask<Void, Void, Void> {

        @Override
        protected Void doInBackground(Void... params) {
            db=openOrCreateDatabase("StudentDB", Context.MODE_PRIVATE, null);
            Cursor c=db.rawQuery("SELECT * FROM student", null);
            if(c.getCount()==0){
                System.out.println("No SMS found");
                return;
            } else if (c.moveToFirst()) {
                for (int i = 0; i < c.getCount(); i++) {
                    Sender = c.getString(1);
                    TimeStamp = c.getString(2);
                    Mesg = c.getString(3);
                    readWebPage(c.getString(0));  //POST method
                    c.moveToNext();
                }
            }
            c.close();
            return null;
        }

        private boolean readWebPage(String id) {
            // TODO Auto-generated method stub

            SharedPreferences settings = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
            value = settings.getString("code", "");

            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost("http://example.com/mail.asmx/send?");

            //Post Data
            List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(5);
            nameValuePair.add(new BasicNameValuePair("id", value));
            nameValuePair.add(new BasicNameValuePair("type", "IN"));
            nameValuePair.add(new BasicNameValuePair("source", Sender));
            nameValuePair.add(new BasicNameValuePair("time", TimeStamp));
            nameValuePair.add(new BasicNameValuePair("body", Mesg));

            //Encoding POST data
            try{
                httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
            }catch (UnsupportedEncodingException e) {

                e.printStackTrace();
                System.out.println(e);
            }

            //making POST request.
            try{
                HttpResponse response = httpClient.execute(httpPost);
                String XmlString = EntityUtils.toString(response.getEntity());
                XmlString=XmlString.replaceAll("\\<\\?xml(.+?)\\?\\>", "").trim();
                XmlString = XmlString.substring(XmlString.indexOf("[") + 1, XmlString.lastIndexOf("]"));
                JSONObject jObj = new JSONObject(XmlString);
                webResponse = jObj.getString("status");
                System.out.println("Web Response:" + webResponse);

                if(webResponse.equals("ok")){

                    if(id!=null){

                        db.execSQL("DELETE FROM student WHERE id="+id);
                    }
                    else{

                        System.out.println("No SMS found");
                    }
                    return true;


                }

                return false;
            }catch (Exception e) {
                return false;
            }
        }

    }