Android Open Source - expo-connect R E S T Client

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Back to project page expo-connect.

License

The source code is released under:

GNU General Public License

Java Source Code

package it.polimi.camparollo.expoconnect.datatransfer;
//from ww  w .j a v a  2 s.c  om
import it.polimi.camparollo.expoconnect.R;
import it.polimi.camparollo.expoconnect.recommendations.RestaurantListActivity;
import it.polimi.camparollo.expoconnect.recommendations.RestaurantListAdapter;
import it.polimi.camparollo.expoconnect.recommendations.SingleRestaurant;
import it.polimi.camparollo.expoconnect.wifi.StartActivity;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.ListAdapter;
import android.widget.SimpleAdapter;

public class RESTClient {
  
  private DefaultHttpClient httpclient = new DefaultHttpClient();
  private JSONArray requestBody = new JSONArray();
  private String url = "http://recommenderservice.apphb.com/RecommenderService.svc/GetRecommendationCached"; 
  
  private RestaurantListActivity context;
  private ProgressDialog pDialog;
  private int index = -1;
  
  public RESTClient(RestaurantListActivity context) {
    this.context = context;
  }

  public void setRequestBody(JSONArray requestBody) {
    this.requestBody = requestBody;
  }
  
  public void executeQuery(){
    new NetworkTask().execute();
  }

  public void setIndex(int index) {
    this.index  = index;
  }
  
  private JSONArray getRecommendations(JSONArray usersData) throws ClientProtocolException, IOException, JSONException{
    
    Log.d(StartActivity.TAG, "Sending request to he server: " + usersData.toString());
    
    HttpPost httppost = new HttpPost(url);
    httppost.setHeader("Content-type", "application/json");
    
    httppost.setEntity(new StringEntity("\"" + usersData.toString().replaceAll("\"", "'") + "\""));
    
    HttpResponse response = httpclient.execute(httppost);
    HttpEntity entity = response.getEntity();
      
    String responseStr = EntityUtils.toString(entity);
    
    //Log.d(StartActivity.TAG, responseStr.replace("\"[", "[").replace("\\\"", "\"").replace("\\\\", "/"));
    
    JSONArray responseArray = new JSONArray(responseStr.replace("\"[", "[").replace("\\\"", "\"").replace("\\\\", "/"));
      
    return responseArray;
    
  }
  
  private class NetworkTask extends AsyncTask<Void, Void, JSONArray>{
    
    private ArrayList<HashMap<String, String>> restaurantList = new ArrayList<HashMap<String,String>>();
    
    @Override
    protected void onPreExecute() {
      super.onPreExecute();
      // Showing progress dialog
      pDialog = new ProgressDialog(context);
      pDialog.setMessage("Please wait...");
      pDialog.setCancelable(false);
      pDialog.show();

    }
    
    @Override
    protected JSONArray doInBackground(Void... params) {
      
      JSONArray restaurants;
      try {
        restaurants = getRecommendations(requestBody);
      } catch (Exception e) {
        restaurants = new JSONArray();
        Log.d(StartActivity.TAG, "Error: " + e.getMessage());
      } 
      
      try {

        // looping through All Restaurants
        for (int i = 0; i < restaurants.length(); i++) {
          JSONObject r = restaurants.getJSONObject(i);

          String id_r = r.getString(RestaurantListAdapter.TAG_ID_RESTAURNAT);
          String name = r.getString(RestaurantListAdapter.TAG_NAME_RESTAURNAT);
          String price = r.getString(RestaurantListAdapter.TAG_PRICE);
          String type = r.getString(RestaurantListAdapter.TAG_COUSINES);
          String rating = r.getString(RestaurantListAdapter.TAG_RATING);
          String addr = r.getString(RestaurantListAdapter.TAG_RESTAURANT_ADDRESS);
          String lat = r.getString(RestaurantListAdapter.TAG_LATITUDE);
          String lon = r.getString(RestaurantListAdapter.TAG_LONGITUDE);
          String web = r.getString(RestaurantListAdapter.TAG_WEB_PAGE);
          String opt = r.getString(RestaurantListAdapter.TAG_OPTIONS);
          JSONArray photos = r.getJSONArray(RestaurantListAdapter.TAG_PHOTOS);
          
          // tmp hashmap for single contact HashMap<String,
          // String>
          HashMap<String, String> restaurant = new HashMap<String, String>();

          // adding each child node to HashMap key => value
          restaurant.put(RestaurantListAdapter.TAG_ID_RESTAURNAT, id_r);
          restaurant.put(RestaurantListAdapter.TAG_NAME_RESTAURNAT, name);
          restaurant.put(RestaurantListAdapter.TAG_PRICE, "Price range: " + price);
          restaurant.put(RestaurantListAdapter.TAG_COUSINES, "Cuisines: " + type);
          restaurant.put(RestaurantListAdapter.TAG_RATING, "User rating: " + rating);
          restaurant.put(RestaurantListAdapter.TAG_RESTAURANT_ADDRESS, addr);
          restaurant.put(RestaurantListAdapter.TAG_LATITUDE, lat);
          restaurant.put(RestaurantListAdapter.TAG_LONGITUDE, lon);
          restaurant.put(RestaurantListAdapter.TAG_WEB_PAGE, web);
          restaurant.put(RestaurantListAdapter.TAG_OPTIONS, opt);
          restaurant.put(RestaurantListAdapter.TAG_PHOTOS, photos.toString());
          
          // adding restaurant to restaurant list
          restaurantList.add(restaurant);
          
        }
        
        context.setRestaurantList(restaurantList);

      } catch (JSONException e) {
        Log.d(StartActivity.TAG, "Error: " + e.getMessage());
      }
      
      return restaurants;
    }

    @Override
    protected void onPostExecute(JSONArray response) {
      
      super.onPostExecute(response);
      //Log.d(StartActivity.TAG, "Response from the server: " + response.toString());

      if (index != -1) {
        HashMap<String, String> r = restaurantList.get(index);
        // Starting single restaurant activity
        Intent in = new Intent(context,
            SingleRestaurant.class);
  
        in.putExtra("restaurantMap", r);
        in.putExtra("DataShare", requestBody.toString());
  
        context.startActivityForResult(in, 0);
        
        // Dismiss the progress dialog
        if (pDialog.isShowing())
          pDialog.dismiss();
        
      } else {
      
        // Dismiss the progress dialog
        if (pDialog.isShowing())
          pDialog.dismiss();
        
        // Updating parsed JSON data into ListView
        ListAdapter adapterRestaurantList = new RestaurantListAdapter(context, restaurantList);
        context.setListAdapter(adapterRestaurantList);
      }
    }
    
  }

}

Java Source Code List

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