Android Open Source - android.app.niuz.io Categories Subcategories Service

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License

The source code is released under:

GNU General Public License

Java Source Code

package io.niuz.services;
/*from   w w w .  j  a v a2  s .  c  o  m*/
import io.niuz.model.CategoryInformation;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
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.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.Context;

public class CategoriesSubcategoriesService extends BaseService {
  private static Map<Integer, String> categoriesMap = new HashMap<Integer, String>(); 
  private static ArrayList<HashMap<Integer, String>> subcategoriesMap = new ArrayList<HashMap<Integer, String>>();
  
  private final static String SERVER_LINK_LIST_CATEGORIES = SERVER_URL + "listCategories/";
  private final static String SERVER_LINK_LIST_SUBCATEGORIES = SERVER_URL + "listSubcategories/";
  private final static String SERVER_LINK_INIT_USER_SUBCATEGORIES = SERVER_URL + "initUserSubcategories/";

  public static void initCategories() throws ClientProtocolException, IOException, JSONException { 
    JSONArray result =  initJSONArrayFromLink(SERVER_LINK_LIST_CATEGORIES, "categories");
    subcategoriesMap.clear();
    subcategoriesMap.add(null); // Increasing size for subcategories map
    for (int i=0 ; i<result.length() ; i++) {
      JSONObject valuesObject = result.getJSONObject(i);
      categoriesMap.put(valuesObject.getInt("id"), valuesObject.getString("name"));
      subcategoriesMap.add(null); // Increasing size for subcategories map
    }
  }
  
  public static void initSubcategories() throws ClientProtocolException, IOException, JSONException {
    JSONArray result =  initJSONArrayFromLink(SERVER_LINK_LIST_SUBCATEGORIES, "subcategories");

    for (int i=0 ; i<result.length() ; i++) {
      JSONObject valuesObject = result.getJSONObject(i);
      int categoryId = valuesObject.getInt("CategoryId");
      
      if (subcategoriesMap.get(categoryId) == null) {
        subcategoriesMap.add(categoryId, new HashMap<Integer, String>());
      }
      
      subcategoriesMap.get(categoryId).put(valuesObject.getInt("id"), valuesObject.getString("name"));
    }
  }
  
  private static JSONArray initJSONArrayFromLink(String url, String jsonName) throws ClientProtocolException, 
      IOException, JSONException {
    String getUrl = url;
    HttpClient httpClient = new DefaultHttpClient();
    HttpResponse response = httpClient.execute(new HttpGet(getUrl));
    StatusLine statusLine = response.getStatusLine();
    
    if (statusLine.getStatusCode() == HttpStatus.SC_OK){
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          response.getEntity().writeTo(out);
          out.close();
          return new JSONObject(out.toString()).getJSONArray(jsonName);
  
      } else{
          response.getEntity().getContent().close();
          throw new IOException(statusLine.getReasonPhrase());
      }
  }
  
  public static void initUserSubcategories(CategoryInformation[] categoryInformation, Context context) throws Exception {
    // Forming JSON
    JSONArray subcategories = new JSONArray();
    for (CategoryInformation infoObject : categoryInformation) {
      for (Map.Entry<Integer, String> entry : infoObject.getSubcategoriesSelected().entrySet()) {
        JSONObject subcategory = new JSONObject();
        subcategory.put("sc", entry.getKey());
        subcategories.put(subcategory);
      }
    }
    
    JSONObject objectToSend = new JSONObject();
    PhoneService.initPhoneNumber(context.getApplicationContext());
    objectToSend.put("phoneNumber", PhoneService.getPhoneNumber());
    objectToSend.put("subcategories", subcategories);
    
    // Posting request
    HttpPost httpPost = new HttpPost(SERVER_LINK_INIT_USER_SUBCATEGORIES);
    httpPost.setEntity(new StringEntity(objectToSend.toString()));
    httpPost.setHeader("Accept", "application/json");
    httpPost.setHeader("Content-type", "application/json");
    HttpClient httpClient = new DefaultHttpClient();
    HttpResponse response = httpClient.execute(httpPost);
    
    // Parsing response, throwing exception if required
    StatusLine statusLine = response.getStatusLine();
    if (statusLine.getStatusCode() == HttpStatus.SC_OK){
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          response.getEntity().writeTo(out);
          out.close();
          
          if (!new JSONObject(out.toString()).getBoolean("success")) {
            throw new Exception("Something went wrong during API execution!");
          }
          
    } else {
      response.getEntity().getContent().close();
      throw new Exception("Bad http status!");
    }
  }
  
  public static Map<Integer, String> getCategoriesMap() {
    return categoriesMap;
  }
  
  public static Map<Integer, String> getSubcategoriesMap(int categoryId) {
    return subcategoriesMap.get(categoryId);
  }
}

Java Source Code List

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