How to display required data from json?

Hello I am new to android..I am creating one application..in my application I am getting some data via json..it looks like this..

 {
 "interestsent":
  [
    {
     "interestsent_user_id":369,
     "name":"Biggy Bro",
     "profile_id":"nj686317",
     "image":"",
     "cast":"Not Willing to specify",
     "age":"34",
    },
    {
     "interestsent_user_id":370,
     "name":"Adam rose",
     "profile_id":"nj686318",
     "image":"",
     "cast":"Not Willing to specify",
     "age":"34",
    },
    {
     "interestsent_user_id":371,
     "name":"Bunny",
     "profile_id":"nj686319",
     "image":"",
     "cast":"Not Willing to specify",
     "age":"34",
    },
    {
     "interestsent_user_id":372,
     "name":"Santino",
     "profile_id":"nj686320",
     "image":"",
     "cast":"Not Willing to specify",
     "age":"34",
    },
    {
     "interestsent_user_id":372,
     "name":"Roseline",
     "profile_id":"GM686321",
     "image":"",
     "cast":"Not Willing to specify",
     "age":"34",
    },
  ]
}

the above is my json response..I am able to display all the records in my listview,now what if I need to display three records only and then want to put "Load More" button and and after click on that remaining records will print..can any one help me?

 @Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.list_view_sent);
    nointsent=(TextView)findViewById(R.id.no_intsent);
    String strtexts = getIntent().getStringExtra("id");
    System.out.println("<<<<<<<< id : " + strtexts);
    INTEREST_SENT_URL = "my url";

   // listview=(ListView)findViewById(R.id.list);

    //ListView listview = this.getListView();

    ListView listview = (ListView)findViewById(android.R.id.list);

     // Making a request to url and getting response
    data = new ArrayList<HashMap<String, String>>();
    jsonStr = sh.makeServiceCall(INTEREST_SENT_URL, ServiceHandler.GET);

    Log.d("Response first: ", "> " + jsonStr);

    if (jsonStr != null) {
        try {
            JSONObject jsonObj = new JSONObject(jsonStr);

            // Getting JSON Array node
            interestsent = jsonObj.getJSONArray(INTEREST_SENT);



            // looping through All Contacts
            for (int i = 0; i < interestsent.length(); i++) {
                JSONObject c = interestsent.getJSONObject(i);

                // creating new HashMap
                HashMap<String, String> map = new HashMap<String, String>();

                // adding each child node to HashMap key => value
                map.put(INTEREST_USER_ID, c.getString(INTEREST_USER_ID));
                map.put(INTEREST_SENT_NAME,c.getString(INTEREST_SENT_NAME));
                map.put(INTEREST_SENT_PROFILE, c.getString(INTEREST_SENT_PROFILE));
                map.put(INTEREST_SENT_IMAGE, c.getString(INTEREST_SENT_IMAGE));
                map.put(INTEREST_SENT_CAST, c.getString(INTEREST_SENT_CAST));
                map.put(INTEREST_SENT_AGE, c.getString(INTEREST_SENT_AGE)+" years");
                map.put(INTEREST_SENT_LOCATION, c.getString(INTEREST_SENT_LOCATION));

                // adding HashList to ArrayList
                data.add(map);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    } else {
        Log.e("ServiceHandler", "Couldn't get any data from the url");
    }

    // LoadMore button
    Button btnLoadMore = new Button(this);
    btnLoadMore.setText("Load More");

    // Adding Load More button to lisview at bottom
    listview.addFooterView(btnLoadMore);

    // Getting adapter
   adapter = new CustomAdapterSent(getBaseContext(), data);

    listview.setAdapter(adapter);

    new LoadAlbums().execute();
}

 @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        Intent intent = new Intent(getApplicationContext(), InterestDetails.class);
        intent.putExtra("interestsent_user_id", aList.get(position).get(INTEREST_USER_ID));
        startActivity(intent);
    }

    class LoadAlbums extends AsyncTask<String, String, ArrayList<HashMap<String,String>>> {


        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(InterestSent.this);
            pDialog.setMessage("Loading...");
            pDialog.setIndeterminate(true);
            pDialog.setIndeterminateDrawable(getResources().getDrawable(R.drawable.custom_progress));
            pDialog.setCancelable(false);
            pDialog.show();
        }
        protected ArrayList<HashMap<String,String>> doInBackground(String... args) {
            sh = new ServiceHandler();

            // Making a request to url and getting response
           data = new ArrayList<HashMap<String, String>>();
          jsonStr = sh.makeServiceCall(INTEREST_SENT_URL, ServiceHandler.GET);

            Log.d("Response: ", "> " + jsonStr);

            if (jsonStr != null) {
                try {
                    JSONObject jsonObj = new JSONObject(jsonStr);

                    // Getting JSON Array node
                    interestsent = jsonObj.getJSONArray(INTEREST_SENT);



                    // looping through All Contacts
                    for (int i = 0; i < interestsent.length(); i++) {
                        JSONObject c = interestsent.getJSONObject(i);

                        // creating new HashMap
                        HashMap<String, String> map = new HashMap<String, String>();

                        // adding each child node to HashMap key => value
                        map.put(INTEREST_USER_ID, c.getString(INTEREST_USER_ID));
                        map.put(INTEREST_SENT_NAME,c.getString(INTEREST_SENT_NAME));
                        map.put(INTEREST_SENT_PROFILE, c.getString(INTEREST_SENT_PROFILE));
                        map.put(INTEREST_SENT_IMAGE, c.getString(INTEREST_SENT_IMAGE));
                        map.put(INTEREST_SENT_CAST, c.getString(INTEREST_SENT_CAST));
                        map.put(INTEREST_SENT_AGE, c.getString(INTEREST_SENT_AGE)+" years");
                        map.put(INTEREST_SENT_LOCATION, c.getString(INTEREST_SENT_LOCATION));

                        // adding HashList to ArrayList
                        data.add(map);
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            } else {
                Log.e("ServiceHandler", "Couldn't get any data from the url");
            }

            return data;
        }


        protected void onPostExecute(ArrayList<HashMap<String,String>> result) {

            super.onPostExecute(result);

            if(interestsent == null || interestsent.length() == 0){
                   // Toast.makeText(getApplicationContext(), "No response", Toast.LENGTH_SHORT).show();
                nointsent.setText("  No Interest Sent  ");

            }
            else
            {
                nointsent.setVisibility(View.INVISIBLE);
            }
            // dismiss the dialog after getting all albums
            if (pDialog.isShowing())
                pDialog.dismiss();
            // updating UI from Background Thread

            if(aList == null){
                aList = new ArrayList<HashMap<String, String>>();
                aList.addAll(result);
                adapter = new CustomAdapterSent(getBaseContext(), result);
                setListAdapter(adapter);
            }else{
                aList.addAll(result);
                adapter.notifyDataSetChanged();
            }
        }

    }