Android Open Source - lastUpdates Async Youtube Parser

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The source code is released under:
GNU General Public License
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Java Source Code

package com.focusings.focusingsworld.YoutubeParser;
/*w w  w .j ava2  s  .c  o  m*/
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;

import android.os.AsyncTask;
import android.widget.TextView;

import com.focusings.focusingsworld.MainActivity;
import com.focusings.focusingsworld.R;
import com.focusings.focusingsworld.VideoInfo;
import com.focusings.focusingsworld.ImageAndTextList.ImageAndText;
import com.focusings.focusingsworld.ImageAndTextList.ImageAndTextListAdapter;
import com.focusings.focusingsworld.pullToRefreshLibrary.PullToRefreshListView;
import com.focusings.focusingsworld.pullToRefreshLibrary.PullToRefreshYoutubeOnRefreshListener;

public class AsyncYoutubeParser extends AsyncTask<String, Integer,List<ImageAndText>> {

  private int tabNumber=1;
  private boolean needToCallOnRefreshComplete=false;
  private MainActivity mainActivity;
  
  public AsyncYoutubeParser(MainActivity mainActivity) {
        this.mainActivity = mainActivity;
    }
  
  @Override
  protected void onPreExecute() {
    super.onPreExecute();
  }
  
  @Override
  protected List<ImageAndText> doInBackground(String... params) {
    //List<ImageAndText> list=AsyncYoutubeParserGeneral.doInBackgroundGeneral(params);
    List<ImageAndText> l1=new ArrayList<ImageAndText>();
    
    try{
      if (params[0].contains(MainActivity.properties.getProperty("tab_1_channel_name"))){
        tabNumber=1;
      }
      if (params[0].contains(MainActivity.properties.getProperty("tab_2_channel_name"))){
        tabNumber=2;
      }
      if (params[1].equals("true")){
        needToCallOnRefreshComplete=true;
      }
        
      URL url = new URL(params[0]);
          DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
          DocumentBuilder db = dbf.newDocumentBuilder();
          Document doc = db.parse(new InputSource(url.openStream()));
          doc.getDocumentElement().normalize();
  
          NodeList nodeList = doc.getElementsByTagName("entry");
  
          //Get first item and save it in lastUpdatePerChannel variable
          Node firstNode = nodeList.item(0);                
            NodeList firstNodeListEntry=firstNode.getChildNodes();
            //I get the node that has the id
            Node IdNode=firstNodeListEntry.item(0);
            String urlLastVideo=IdNode.getTextContent();            
            Date publishingDateLastVideo = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'").parse(firstNodeListEntry.item(1).getTextContent());
          VideoInfo vi=new VideoInfo(urlLastVideo, publishingDateLastVideo);
          
          //I create the MainActivity.lastUpdatePerChannel in the proper order
          MainActivity.lastUpdatePerChannel[tabNumber-1]=vi;
          
          for (int i = 0; i < nodeList.getLength() && i<10; i++) {
  
              Node node = nodeList.item(i);
              
              NodeList nodeListEntry=node.getChildNodes();
              String currentTitle=new String();
              String currentImage=new String();
              String currentUrl=new String();
              boolean foundLink=false;
              
              for (int j=0;j<nodeListEntry.getLength();j++){
                Node currentNode=nodeListEntry.item(j);                
                if (currentNode.getNodeName().equals("title")){
                  currentTitle=currentNode.getTextContent();
                }
                if (!foundLink && currentNode.getNodeName().equals("link")){
                  foundLink=true;
                  
                  NamedNodeMap nnm=currentNode.getAttributes();
                  Node nodeUrl=nnm.getNamedItem("href");
                  currentUrl=nodeUrl.getTextContent();
                }
                if (currentNode.getNodeName().equals("media:group")){
                  NodeList nodeListMediaGroup=currentNode.getChildNodes();
                  boolean found=false;
                  for (int k=0;k<nodeListMediaGroup.getLength()&&!found;k++){
                    Node currentNodeMediaGroup =nodeListMediaGroup.item(k);
                      if (currentNodeMediaGroup.getNodeName().equals("media:thumbnail")){
                        found=true;
                        NamedNodeMap nnm=currentNodeMediaGroup.getAttributes();
                        Node nodeImageUrl=nnm.getNamedItem("url");
                        currentImage=nodeImageUrl.getTextContent();
                      }                    
                  }                
                }
              }

              ImageAndText i1= new ImageAndText(currentImage, currentTitle,currentUrl);
              l1.add(i1); 
       }
      } catch (Exception e) {
          System.out.println("XML Pasing Exception = " + e);
      }
    
    return l1;

  }
  
  @Override
  protected void onPostExecute(List<ImageAndText> result) {
    //this you will received result fired from async class of onPostExecute(result) method.
    ImageAndTextListAdapter adapter = new ImageAndTextListAdapter(mainActivity,result);
    
    TextView errorLog=null;
    PullToRefreshListView listView=null;
    if (tabNumber==1){
      errorLog=(TextView)mainActivity.findViewById(R.id.errorLog1);
      listView = (PullToRefreshListView)mainActivity.findViewById(R.id.pull_to_refresh_listview1);
    }
    if (tabNumber==2){
      errorLog=(TextView)mainActivity.findViewById(R.id.errorLog2);
      listView = (PullToRefreshListView)mainActivity.findViewById(R.id.pull_to_refresh_listview2);
    }
    if (tabNumber==3){
      errorLog=(TextView)mainActivity.findViewById(R.id.errorLogTwitter);
      listView = (PullToRefreshListView)mainActivity.findViewById(R.id.pull_to_refresh_listview_twitter);
    }
    
    if (result.size()==0){
      if (mainActivity.isOnline()==false){        
        errorLog.setText(R.string.noInternetConnection);
      }else{
        errorLog.setText(R.string.noYoutubeConnection);
      }
    }else{
      errorLog.setText("");
    }
    
    //According to the pullToRefresh library I'm using, I need to call listView.onRefreshComplete() 
    //so that the spinner stops, but I only need to do this if I come from onRefreshListener (because it
    //means the spinner was already been displayed), if I come from initializations the spinner isn't displayed,
    //so, I shouldn't call listView.onRefreshComplete()
    if (needToCallOnRefreshComplete && listView!=null){
      listView.onRefreshComplete();
    }
    
    //Case of listView
    if (listView!=null){
      listView.setOnRefreshListener(new PullToRefreshYoutubeOnRefreshListener(tabNumber,mainActivity));    
      listView.setAdapter(adapter);
    }/*else{
      GridView gridView=null;
      if (tabNumber==1){
        gridView = (GridView)findViewById(R.id.gridview1);
        gridView.setAdapter(adapter);
      }
      if (tabNumber==2){
        gridView = (GridView)findViewById(R.id.gridview2);
        gridView.setAdapter(adapter);
      }
    }*/  
  }
}
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