есть код

package com.example.json;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.HashMap;
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
 
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
 
public class MainActivity extends Activity {
    
    private int pageNumber = 1;
    private String url = "http://hantim.ru/search.json?page=";
    
    LazyAdapter adapter;
    
    public TextView textView;
    
    ArrayList<HashMap<String, String>> jobsList = new ArrayList<HashMap<String, String>>();
    
    
    MyTask mt;
    
    static final String KEY_ICON = "icon";
    static final String KEY_TITLE = "title";
    static final String KEY_OCCUPATION = "occupation";
    static final String KEY_PUBLISHED = "published";
    static final String KEY_URL = "url";
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        StrictMode.enableDefaults();
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button nextBtn = (Button) findViewById(R.id.nextBtn);
        Button backBtn = (Button) findViewById(R.id.backBtn);    
        textView = (TextView)findViewById(R.id.textView1);
        textView.setText("Страница:  "+String.valueOf(pageNumber));
        
        showJobList();
        
        nextBtn.setOnClickListener(new OnClickListener() {
            
            @Override 
            public void onClick(View v) {
                Log.d("NEXT", "CLICKED!!!");
                pageNumber++;
                showJobList();
                
            }
        });
        
        backBtn.setOnClickListener(new OnClickListener() {
            
            @Override 
            public void onClick(View v) {
                Log.d("BACK", "CLICKED!!!");
                if(pageNumber <= 1) return;
                else pageNumber--;
                showJobList();
                
            }
        });
        
    }
    
    public void showJobList() {
        
        if(!hasInternetConnection()) {
            Toast toast = Toast.makeText(getApplicationContext(), "no internet connection", Toast.LENGTH_LONG); 
            toast.show();
            return;
        }
        
        TextView textView = (TextView)findViewById(R.id.textView1);
        ListView listView = (ListView) findViewById(R.id.listView1);
        
        jobsList.clear();
        
        textView.setText("Страница:  "+String.valueOf(pageNumber));
        
        String readJobs = readJOBS();
        
        mt = new MyTask();
        mt.execute(readJobs);
        
        try {
            jobsList = mt.get();
        } catch(Exception e) {
            
        }
        
        adapter=new LazyAdapter(this, jobsList);
        listView.setAdapter(adapter);
        
        
     // Click event for single list row
        listView.setOnItemClickListener(new OnItemClickListener() {
 
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                    long arg3) {
                
                Log.d("Item", jobsList.get((int)arg3).get("url"));
                
                Intent intent = new Intent(getApplicationContext(), SecondActivity.class);
                intent.putExtra("url", jobsList.get((int)arg3).get("url"));
                startActivity(intent);
                
                Log.d("Item", "CLICKED!!!");
            }
        });
        
    }
    
    
    
    public static Bitmap DownloadImage(String URL) {
        Bitmap bitmap = null;
        InputStream in = null;
        try {
            in = OpenHttpConnection(URL);
            bitmap = BitmapFactory.decodeStream(in);
            in.close();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        return bitmap;
    }
    
    
    
    private static InputStream OpenHttpConnection(String urlString) throws IOException {
        InputStream in = null;
        int response = -1;
 
        URL url = new URL(urlString);
        URLConnection conn = url.openConnection();
 
        if (!(conn instanceof HttpURLConnection))
            throw new IOException("Not an HTTP connection");
 
        try {
            HttpURLConnection httpConn = (HttpURLConnection) conn;
            httpConn.setAllowUserInteraction(false);
            httpConn.setInstanceFollowRedirects(true);
            httpConn.setRequestMethod("GET");
            httpConn.connect();
            response = httpConn.getResponseCode();
            if (response == HttpURLConnection.HTTP_OK) {
                in = httpConn.getInputStream();
            }
        } catch (Exception ex) {
            throw new IOException("Error connecting");
        }
        return in;
    }
    
    
    
    public String readJOBS() {
        StringBuilder builder = new StringBuilder();
        HttpClient client = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(url + pageNumber);
        try {
            HttpResponse response = client.execute(httpGet);
            StatusLine statusLine = response.getStatusLine();
            int statusCode = statusLine.getStatusCode();
            if (statusCode ==200) {
                HttpEntity entity = response.getEntity();
                InputStream content = entity.getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(content));
                String line;
                while ((line = reader.readLine()) != null) {
                    builder.append(line);
                }
            }
            else {
                Log.e(MainActivity.class.toString(), "Download fail");
            }
        }
        catch (ClientProtocolException e) {
            e.printStackTrace();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        return builder.toString();
    }
    
    public boolean hasInternetConnection() {
        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo netInfo = cm.getActiveNetworkInfo();
            if (netInfo != null && netInfo.isConnectedOrConnecting()) {
                return true;
            }
            return false;
    }
    
    class MyTask extends AsyncTask<String, Void, ArrayList<HashMap<String, String>>> {
 
        @Override
        protected ArrayList<HashMap<String, String>> doInBackground(String... params) {
            
            try {
              
              JSONObject jsonObject = new JSONObject(params[0]);
              JSONArray jobs = jsonObject.getJSONArray("jobs");
              
              for (int i = 0; i < jobs.length(); i++) {
                  
                  HashMap<String, String> map = new HashMap<String, String>();
                  
                  JSONObject jobsObj1 = jobs.getJSONObject(i);
                  String str1 = String.valueOf(jobsObj1.getString(KEY_TITLE));
                  String str2 = "Опубликовано: "+String.valueOf(jobsObj1.getString(KEY_PUBLISHED));
                  String str3 = "Занятость: "+String.valueOf(jobsObj1.getString(KEY_OCCUPATION));
                  String str4 = String.valueOf(jobsObj1.getString(KEY_ICON));
                  String str5 = String.valueOf(jobsObj1.getString(KEY_URL));
                  map.put(KEY_TITLE, str1);
                  map.put(KEY_OCCUPATION, str3);
                  map.put(KEY_PUBLISHED, str2);
                  map.put(KEY_ICON, str4);
                  map.put(KEY_URL, str5);
                  
                  
                  jobsList.add(map);
 
              }
              
          } catch (Exception e) {
            e.printStackTrace();
            Log.d("async task", "fail");
          }
          return jobsList;
        }
        
      }
    
}

он загружает с сайта вакансии. делает все это в асинхронном потоке, но не так как хотелось бы. нужно чтоб он выводил строки постепенно, пока остальные подгружаются. догадываюсь что нужно использовать методы onProgressUpdate и publishProgress но как это правильно делать никак не могу понять