Android Open Source - lastUpdates Check New Updates Service

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License

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

package com.focusings.focusingsworld.notificationManagement;
// w w w.  j a  v  a 2s. c  o  m
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;

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

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

import com.focusings.focusingsworld.MainActivity;
import com.focusings.focusingsworld.VideoInfo;

import android.app.IntentService;
import android.content.Intent;
import android.os.AsyncTask;

public class CheckNewUpdatesService extends IntentService {

  public static AsyncNotificationResponse delegate=null;
  
  public CheckNewUpdatesService() {
    super("CheckNewUpdatesService");
  }
  
  @Override
  protected void onHandleIntent(Intent intent) {
    new CheckNewUpdatesTask().execute();
  }
  
  private class CheckNewUpdatesTask extends AsyncTask<String, Void, List<Update>> {
    @Override
    protected List<Update> doInBackground(String... strings) {
      
      List<Update> lu= new LinkedList<Update>();
      try{
      
        //Check if there is any update in any of the channels
        int numberOfTabs=Integer.parseInt(MainActivity.properties.getProperty("number_of_tabs"));
        for (int i=0;i<numberOfTabs;i++){        
          URL url = new URL(MainActivity.properties.getProperty("Youtube_URL_part_1")+MainActivity.properties.getProperty("tab_"+(i+1)+"_channel_name")+MainActivity.properties.getProperty("Youtube_URL_part_2"));
          DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
          DocumentBuilder db = dbf.newDocumentBuilder();
          Document doc = db.parse(new InputSource(url.openStream()));
          doc.getDocumentElement().normalize();
      
              NodeList nodeList = doc.getElementsByTagName("entry");
      
              //Go to the first item
              Node node = nodeList.item(0);
                  
                NodeList nodeListEntry=node.getChildNodes();
                
                //I get the node that has the id
                Node firstNode=nodeListEntry.item(0);
                String lastUrl=firstNode.getTextContent();
                
                boolean foundTitle=false;
                
                //Case MainActivity.lastUpdatePerChannel not initialized
                if (MainActivity.lastUpdatePerChannel[i]==null){
                  VideoInfo vi=new VideoInfo(lastUrl, new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'").parse(nodeListEntry.item(1).getTextContent()));
                  MainActivity.lastUpdatePerChannel[i]=vi;
                }
                
                //If lastId is not the last one, then I look for the title of the video and send a notification
                if (lastUrl!=null && MainActivity.lastUpdatePerChannel[i]!=null && !lastUrl.equals(MainActivity.lastUpdatePerChannel[i].getUrl())){
                                    
                  //Check if lastId is newer than the one in MainActivity.lastUpdatePerChannel
                  Date publishingDateNewVideo = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'").parse(nodeListEntry.item(1).getTextContent());
                  Date publishingDateOldVideo = MainActivity.lastUpdatePerChannel[i].getPublishingDate();
                  
                  //If new video is newer than the previous one, then I should send a notification
                  //Otherwise, it may be the youtuber has deleted the last video, so we
                  //shouldn't send the notification
                  if (publishingDateNewVideo.after(publishingDateOldVideo)){                    
                    //First, I look for the new title
                    //Send notification
                    for (int j=0;j<nodeListEntry.getLength() && !foundTitle;j++){
                      Node currentNode=nodeListEntry.item(j);
                      if (currentNode.getNodeName().equals("title")){
                        foundTitle=true;
                        Update u=new Update(currentNode.getTextContent(),
                            MainActivity.properties.getProperty("tab_"+(i+1)+"_channel_public_name"),
                            i);
                        lu.add(u);
                      }
                    }
                  }
                    
                  //In both cases, I update the lastUpdatePerChannel
                  MainActivity.lastUpdatePerChannel[i].setUrl(lastUrl);                                    
                  MainActivity.lastUpdatePerChannel[i].setPublishingDate(publishingDateNewVideo);                  
                }
        }
      }catch (Exception e) {
            System.out.println("XML Pasing Exception = " + e);
        }
      //If there is any update, then call sendNotification
      return lu;
    }
    
    @Override
    protected void onPostExecute(List<Update> updates) {
      if (updates!=null && updates.size()>0){
        //Send notification
        delegate.sendNotification(updates);
      }
    }
  }
}
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