Only showing 10 blogpost not 20!!

package com.jerdeez.blogreader;

import android.app.ListActivity;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONObject;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;


public class MainListActivity extends ListActivity {

    protected String[] mBlogPostTitles;
    public static final int NUMBER_OF_POSTS = 20;
    public static final String TAG = MainListActivity.class.getSimpleName();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_list);
        if (isNetworkAvailable()) {
            GetBlogPostsTask getBlogPostsTask = new GetBlogPostsTask();
            getBlogPostsTask.execute();
            //Toast.makeText(this, getString(R.string.no_items),Toast.LENGTH_LONG).show();
        }
        else{
            Toast.makeText(this, "Network is unavailable!", Toast.LENGTH_LONG).show();
        }

    }
        private boolean isNetworkAvailable () {
            ConnectivityManager manager = (ConnectivityManager)
                 getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();

            boolean isAvailable=false;
            if(networkInfo != null && networkInfo.isConnected()){
                isAvailable=true;
            }

            return isAvailable;
        }


        @Override
        public boolean onCreateOptionsMenu (Menu menu){
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.main_list, menu);
            return true;
        }

        private class GetBlogPostsTask extends AsyncTask<Object, Void, String> {

            @Override
            protected String doInBackground(Object[] objects) {
                int responseCode = -1;

                try {
                    URL blogFeedUrl = new URL("http://blog.teamtreehouse.com/api/get_recent_summary/?count" + NUMBER_OF_POSTS);
                    HttpURLConnection connection = (HttpURLConnection) blogFeedUrl.openConnection();
                    connection.connect();

                  //Creating are response code so that we can get data from the internet
                    responseCode = connection.getResponseCode();
                    if(responseCode==HttpURLConnection.HTTP_OK){
                        InputStream inputStream = connection.getInputStream(); //store the data into the input stream
                        Reader reader = new InputStreamReader(inputStream);//read the input stream
                        int contentLength = connection.getContentLength();//get the number of characters to read in
                        char [] charArray = new char[contentLength];//create the char array to store the the data
                        reader.read(charArray); //read and store the data array into the char array
                        String responseData = new String(charArray);//create a new string and convert and store from char to string

                        //This creates are Json object
                        JSONObject jSonResponse = new JSONObject(responseData);
                        String status = jSonResponse.getString("status");
                        Log.v(TAG, status);

                        //Creat's an array so we can store are blog posts
                        JSONArray jSonPost = jSonResponse.getJSONArray("posts");
                        //A for loop so are post can run simitanously untill conditions are met.
                        for (int i =0; i < jSonPost.length(); i++){
                            JSONObject jsonPost = jSonPost.getJSONObject(i);
                            String title = jsonPost.getString("title");
                            Log.v(TAG, "posts " + i + ": " + title);

                        }



                    }
                    else{
                        Log.i(TAG, "Unsuccessful HTTP Response Code: " + responseCode);
                    }
                    Log.i(TAG, "Code: " + responseCode);
                } catch (MalformedURLException e) {
                    //e.printStackTrace();
                    Log.e(TAG, "Exception caught: ", e);
                } catch (IOException e) {
                    Log.e(TAG, "Exception caught: ", e);

                } catch (Exception e) {
                    Log.e(TAG, "Exception caught: ", e);
                }


                return "code: " + responseCode;
            }


        }


        }