Android Open Source - com.elsewhat.android.slideshow Flickr Public Set Backend

• Back to Photo/restful  ↑

From Project

Back to project page com.elsewhat.android.slideshow.

License

The source code is released under:

Copyright (C) 2012 Dagfinn Parnas <dagfinn.parnas@gmail.com> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Sof...

Java Source Code

package com.elsewhat.android.slideshow.backend;
/*from  ww w .java  2  s .  c o m*/
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;

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

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;

import android.content.Context;
import android.util.Log;

import com.elsewhat.android.slideshow.activities.SlideshowActivity;
import com.elsewhat.android.slideshow.api.SlideshowPhoto;

public class FlickrPublicSetBackend {
  //TODO-FORK: Define your own flickr api key (this is a test one)
  protected String flickrAPIKey="f6ccebf5e7a6427fec99952ad91939e2";
  protected String photoset_id;
  
  public FlickrPublicSetBackend(String photoset_id){
    this.photoset_id=photoset_id;
  }
  
  /**
   * Retrieve the slideshow photos from the remote source
   * 
   * 
   * @param context
   * @return List of SlideshowPhoto objects
   */
  public List<SlideshowPhoto> getSlideshowPhotos(Context context) throws Throwable {
    String flickrURL = "http://api.flickr.com/services/rest/?method=flickr.photosets.getPhotos"
        + "&api_key="+ flickrAPIKey 
        + "&photoset_id="+ photoset_id
        + "&per_page=500"
        + "&media=photos"
        + "&extras=description,geo,date_taken,tags";  
    Log.i("FlickrPublicFavoritesBackend", "FlickrAPI url "+ flickrURL);
    
    //String feedResponse = null;
    InputStream responseInputStream=null;
    String exceptionMessage="Could not download photos list";
    try {
      //setup the HTTP request
      DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpGet request = new HttpGet(flickrURL);
            HttpParams httpParameters = httpClient.getParams();
            HttpConnectionParams.setConnectionTimeout(httpParameters, 60 * 1000);
            HttpConnectionParams.setSoTimeout        (httpParameters, 60 * 1000);

      //perform the HTTP request
            HttpResponse response = httpClient.execute(request);
            int responseCode = response.getStatusLine().getStatusCode();
            Log.i(SlideshowActivity.LOG_PREFIX, responseCode  + " response code for download of " + flickrURL  );
            
            if(responseCode==200){
              responseInputStream=response.getEntity().getContent();
              //feedResponse = getStringFromInputStream(response.getEntity().getContent());
            }else {
              String message=responseCode  + " for feed was not 200. Will not write to file";
              Log.w(SlideshowActivity.LOG_PREFIX,  message );
              throw new IOException(exceptionMessage);
            }

      
      ArrayList<SlideshowPhoto> alPhotos = new ArrayList<SlideshowPhoto>(50);
      
      InputSource inputSource = new InputSource(responseInputStream);
      //We do DOM parsing as xmls are fairly small
      DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
      DocumentBuilder db = dbf.newDocumentBuilder();
      Document doc = db.parse(inputSource);
      doc.getDocumentElement().normalize();

      NodeList photoElements = doc.getElementsByTagName("photo");

      //loop through photo elements
      for (int i = 0; i < photoElements.getLength(); i++) {
        Node photoNode = photoElements.item(i);
        SlideshowPhoto slideshowPhoto = new SlideshowPhoto();
        //used for calculating the url
        String flickrPhotoId=null;
        String flickrPhotoSecret=null;
        String flickrFarm=null;
        String flickrServer=null;
        
        //for each element check if it has children for the various attributes we are search for
        if (photoNode instanceof Element){
          Element photoElement = (Element)photoNode; 
          //NodeList photoAttributeElements = photoElement.getChildNodes();
          
          
          if (photoElement.hasAttribute("title")){
            slideshowPhoto.setTitle(photoElement.getAttribute("title"));
          }
          if (photoElement.hasAttribute("description")){
            slideshowPhoto.setTitle(photoElement.getAttribute("description"));
          }
          if (photoElement.hasAttribute("id")){
            flickrPhotoId= photoElement.getAttribute("id");
          }
          if (photoElement.hasAttribute("secret")){
            flickrPhotoSecret= photoElement.getAttribute("secret");
          }
          if (photoElement.hasAttribute("server")){
            flickrServer= photoElement.getAttribute("server");
          }
          if (photoElement.hasAttribute("farm")){
            flickrFarm= photoElement.getAttribute("farm");
          }

          
        }
        
        if(flickrPhotoSecret!= null && flickrPhotoId!=null && flickrServer!=null && flickrFarm!=null){
          String photoUrl = "http://farm"+ flickrFarm + ".staticflickr.com/"+flickrServer+"/"+flickrPhotoId+"_"+flickrPhotoSecret+"_b.jpg";
          Log.d(SlideshowActivity.LOG_PREFIX, "Url for photo" + photoUrl);
          slideshowPhoto.setLargePhoto(photoUrl);
        }
          
        if(slideshowPhoto.getLargePhoto()==null){
          Log.w(SlideshowActivity.LOG_PREFIX, "Slideshow photo not parsed correctly from xml. Is missing essential attribute. Slideshowphoto" +slideshowPhoto);
        }else {
          //add photo to list
          alPhotos.add(slideshowPhoto);
        }
      }
      
      if(alPhotos.size()==0){
        return null;
      }else {
        return alPhotos;
      }
      
    } catch (MalformedURLException e) {
      // TODO Auto-generated catch block
      Log.w(SlideshowActivity.LOG_PREFIX, "MalformedURLException " + e.getMessage(),e);
      throw new MalformedURLException(exceptionMessage);
    } catch (IOException e) {
      // TODO Auto-generated catch block
      Log.w(SlideshowActivity.LOG_PREFIX, "IOException " + e.getMessage(),e);
      throw new IOException(exceptionMessage);
    }
    
    
  }
}

Java Source Code List

• Back to Photo/restful  ↑