GetDataFromServer

GetDataFromServer

package co.nuwira.nwrandroiddev;

import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.widget.ListView;

import org.apache.http.HttpResponse;
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.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;

/**
 * Created by Amanda on 6/8/15.
 */
public class GetDataFromServer extends ActionBarActivity{

    String response = "";

    ListView listData;

    ArrayList<Shelter> listShelter = new ArrayList<>();

    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_layout);

        listData        = (ListView) findViewById(R.id.listData);

        new DataTask().execute();
    }

    private class DataTask extends AsyncTask<Void, Void, Void> {
        @Override
        protected void onPreExecute() {

        }

        @Override
        protected Void doInBackground(Void... arg0) {
            InputStream inputStream = null;

            try {
                HttpClient httpClient = new DefaultHttpClient();
                HttpResponse httpResponse = httpClient.execute(new HttpGet("http://yudanta.web.id/trans_jogja.json"));

                inputStream = httpResponse.getEntity().getContent();
                if (inputStream != null){
                    BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
                    String line = "";
                    while((line = bufferedReader.readLine()) != null)
                        response += line;

                    inputStream.close();
                }
            }catch (Exception e){
                e.printStackTrace();
            }


            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            try {
                JSONObject jsonData = new JSONObject(response);
                if (jsonData != null){
                    if (jsonData.getInt("status") == 200){
                        listShelter.clear();

                        JSONArray arrayData = jsonData.getJSONArray("items");
                        for (int i = 0; i < arrayData.length(); i++) {
                            Shelter newShelter = new Shelter();
                            newShelter.setIdShelter(arrayData.getJSONObject(i).getInt("id"));
                            newShelter.setName(arrayData.getJSONObject(i).getString("name"));
                            newShelter.setDescription(arrayData.getJSONObject(i).getString("desc"));
                            newShelter.setLatitude(arrayData.getJSONObject(i).getDouble("latitude"));
                            newShelter.setLongitude(arrayData.getJSONObject(i).getDouble("longitude"));

                            listShelter.add(newShelter);
                        }

                        DataAdapter adapter = new DataAdapter(GetDataFromServer.this, R.layout.row_item, listShelter);
                        listData.setAdapter(adapter);
                        listData.invalidate();

                    }
                }
            }catch (JSONException e){
                e.printStackTrace();
            }
        }
    }

}