HttpHelper.

HttpHelper is used like middle ware for getting response from server. here i am pasting one example how its communicate with HttpRequest class and how its call.

import java.io.StringWriter;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerException;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.NodeList;

import android.app.ProgressDialog;

import android.os.AsyncTask;

import android.util.Log;

import com.ipixcshare.Act_Main;

import com.ipixcshare.Act_SignUp;

import com.ipixcshare.utils.Constants;

import com.ipixcshare.utils.SignUp;

public class HttpHelper extends AsyncTask<String, Integer, Long>

{

       private ProgressDialog dialog;

       private int requestNumber;

       private String loadingMessage;

       private Act_Main activity_signup;

       private Document response_xml;

       SignUp signUp=new SignUp();

       private WebAPIRequest webAPIRequest = new WebAPIRequest();

       public HttpHelper(int request_num, Act_SignUp activity, String msg)

       {

              activity_signup = activity;

              requestNumber = request_num;

              dialog = new ProgressDialog(activity_signup);         

              dialog.setCancelable(false);            

              loadingMessage = msg;

       }

       protected void onPreExecute()

       {

              if(dialog != null)

              {

                     dialog.setMessage(loadingMessage);

                     dialog.show();

              }

       }

       @Override

       protected Long doInBackground(String... value)

       {

              if (requestNumber == Constants.Registration_Code)

              {

                     String request = value[0];

                     response_xml = webAPIRequest.performPost(Constants.App_Url, request);

                     if(response_xml != null)

                     {

                           Log.i("Registration Respopnce:==",getStringFromDocument(response_xml));

                           NodeList root = (NodeList) response_xml.getElementsByTagName("Registration");

                           Element childnode_root = (Element) root.item(0);

                           signUp.success = getValueFromNode(childnode_root, "success");       

                           signUp.message = getValueFromNode(childnode_root, "message");

                     }            

              }

else if (requestNumber == Constants.Favorites_Code)

              {

                     String request_fav = value[0];

                     response_xml = webAPIRequest.performPost(Constants.App_Url, request_fav);

                     if(response_xml != null)

                     {

                           //Log.i("Favorites Respopnce:==",getStringFromDocument(response_xml));

                           NodeList root = (NodeList) response_xml.getElementsByTagName("Favorites");

                           Element childnode_root = (Element) root.item(0);

                           favorites.success = getValueFromNode(childnode_root, "success");          

                           if(favorites.success.equalsIgnoreCase("true"))

                           {

                                  NodeList nodelist_fav = (NodeList) childnode_root.getElementsByTagName("user");                        

                                  for (int i = 0; i < nodelist_fav.getLength(); i++)

                                  {                                

                                         Favorites fav=new Favorites();                 

                                         Element ch_node1 = (Element) nodelist_fav.item(i);

                                         try

                                         {  

                                                fav.userid=getValueFromNode(ch_node1,"userid");

                                                fav.username=getValueFromNode(ch_node1,"username");

                                                fav.mobile=getValueFromNode(ch_node1,"mobile");                                  

                                        

                                                arr_fav.add(fav);

                                         }

                                         catch (Exception e)

                                         {

                                                e.printStackTrace();

                                         }

                                  }     

                           }

                     }

              }

              return null;

       }

       protected void onPostExecute(Long result)

       {

              if(dialog != null)

              {

                     dialog.dismiss();

              }             

          if(requestNumber == Constants.Registration_Code)

              {                   

                     activity_signup.setBackApiResponse(Constants.Registration_Code,signUp);

              }

          else if (requestNumber == Constants.View_Request_Code)

              {

                     activity_viewrequest.setBackApiResponse(Constants.View_Request_Code,arr_vr);

              }

       }

       String getValueFromNode(Element childNode, String tagName)

       {

              String strValue = "";

              try

              {

                     Element node = (Element)childNode.getElementsByTagName(tagName).item(0);

                     for(int i=0;i<node.getChildNodes().getLength();i++)

                     {

                           strValue = strValue.concat(node.getChildNodes().item(i).getNodeValue());

                     }

              }

              catch(Exception exp)

              {            

              }

              return strValue;

       }

       int parseIntValue(String strValue)

       {

              int value=0;

              if(strValue!=null && strValue.length()>0)

              {

                     value = Integer.parseInt(strValue);

              }

              return value;

       }

       float parseFloatValue(String strValue)

       {

              float value=0.0f;

              if(strValue!=null && strValue.length()>0)

              {

                     value = Float.parseFloat(strValue);

              }

              return value;

       }

       double parseDoubleValue(String strValue)

       {

              double value=0.0f;

              if(strValue!=null && strValue.length()>0)

              {

                     value = Double.parseDouble(strValue);

              }

              return value;

       }

       public String getStringFromDocument(Document doc)

       {

              try

              {

                     DOMSource domSource = new DOMSource(doc);

                     StringWriter writer = new StringWriter();

                     StreamResult result = new StreamResult(writer);

                     TransformerFactory tf = TransformerFactory.newInstance();

                     Transformer transformer = tf.newTransformer();

                     transformer.transform(domSource, result);

                     return writer.toString();

              }

              catch(TransformerException ex)

              {

                     ex.printStackTrace();

              }

              return null;

       }

}

It May be case there some attribute present in Tag while your are parsing xml file so below is class for Parsing xml data with Attributes

Helper Class for Attributes:

public class HttpHelperTask

       {

              WebAPIRequest Wapi=new WebAPIRequest();

              Object obj = null;

              public Object GetResponce(String Arg)

              {

                     Document response = Wapi.performPost(Constants.url,Arg);

                     ArrayList<VideosAttribute> arr_videos = new ArrayList<VideosAttribute>();

                     ArrayList<VideosAttribute> arr_Rootvideos = new ArrayList<VideosAttribute>();

                     try

                     {

                           Element RootNode = (Element) response.getElementsByTagName("Videos").item(0);

                           arr_Rootvideos.add(setRootNodeToVideo(RootNode));

                           NodeList NlistVideo = RootNode.getElementsByTagName("Video");

                           for (int j = 0; j < NlistVideo.getLength(); j++)

                           {

                                  VideosAttribute VA = new VideosAttribute();

                                  Element childNode = (Element) NlistVideo.item(j);

                                  VA = setNodeToVideo(childNode);

                                  arr_videos.add(VA);

                           }

                           arr_videos.trimToSize();

                     }

                     catch (Exception e)

                     {}

                     return obj = arr_videos;

              }

              //For Get Attribute of XML element

              public VideosAttribute setNodeToVideo(Element childNode)

              {

                     VideosAttribute video_att = new VideosAttribute();

                     video_att.AssetID=childNode.getAttribute("AssetID");

                     video_att.AlbumID=childNode.getAttribute("AlbumID");

                     return video_att;

              }

              This Method for GetValue:

                     public void GetGameResponce()

              {

                     Element nodevideo = (Element) response.getElementsByTagName("Games").item(0);

                     NodeList nlistvideo = nodevideo.getElementsByTagName("Game"); 

                     for (int j = 0; j < nlistvideo.getLength(); j++)

                     {

                           Game game = new Game();

                           Element childNode = (Element) nlistvideo.item(j);

                           game = setNodeToquestion(childNode);

                           arr_game.add(game);

                     }

                     arr_game.trimToSize();

                     System.out.println("Arry size"+ arr_game.size());

              }

              public Game setNodeToquestion(Element childNode)

              {

                     Game game = new Game();

                     game.Name = getValueFromNode(childNode, "Name") == null ? "": getValueFromNode(childNode, "Name");

                     game.ImageName = getValueFromNode(childNode, "ImageName") == null ? "": getValueFromNode(childNode, "ImageName");

                     game.shortDesc = getValueFromNode(childNode,"shortDesc") == null ? "" : getValueFromNode(childNode,"shortDesc");

                     game.Description = getValueFromNode(childNode,"description") == null ? "" : getValueFromNode(childNode,"description");

                     game.market= getValueFromNode(childNode,"market") == null ? "" : getValueFromNode(childNode,"market");

                     game.website= getValueFromNode(childNode,"website") == null ? "" : getValueFromNode(childNode,"website");

                     Constants.MKY_URL=game.market;

                     Constants.WEBSITE=game.website;

                     System.out.println("Name================="+game.Name);

                     System.out.println("ImageName============"+game.ImageName);

                     System.out.println("shortDesc============"+game.shortDesc);

                     System.out.println("description=========="+game.Description);

                     System.out.println("Mkt Url=========="+game.market);

                     System.out.println("Website Url=========="+game.website);

                     return game;

              }

 -->Now, See below code for how its call and used for getting data from HttpHelperClass.

here is the base class which extends in all activity for getting request response

public class Act_Main extends Activity implements OnClickListener

{ 

       public void setBackApiResponse(int requestNumber,Object obj)

       {

       }     

       @Override

       protected void onCreate(Bundle savedInstanceState)

       {

              super.onCreate(savedInstanceState);     

       }

 }

public class Act_SignUp extends Act_Main

{            

     public void setBackApiResponse(int requestNumber,Object obj)

       {

              signUp=(SignUp) obj;

              if(signUp.success.equalsIgnoreCase("True"))

              {                  

                     Toast.makeText(Act_SignUp.this,signUp.message,Toast.LENGTH_LONG).show();

              }

              else

              {

                     

                     

              }

             

      }       

       @Override

       protected void onCreate(Bundle savedInstanceState)

       {

              // TODO Auto-generated method stub

              super.onCreate(savedInstanceState);

              setContentView(R.layout.main);

                   HttpHelperTask httpHelper = new HttpHelperTask(100, TrainingNotes_Activity.this, "Loading...");                         

                          httpHelper.execute("XmlUrl");

       }

}

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Thank you :)