Android Open Source - SmartNavi Flickr P O I Provider

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License

The source code is released under:

Apache License

Java Source Code

package org.osmdroid.bonuspack.location;
/*from ww w.ja v a 2 s .  c om*/
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.osmdroid.bonuspack.utils.BonusPackHelper;
import org.osmdroid.util.BoundingBoxE6;
import org.osmdroid.util.GeoPoint;
import android.util.Log;

/**
 * POI Provider using Flickr service to get geolocalized photos. 
 * @see http://www.flickr.com/services/api/flickr.photos.search.html
 * @author M.Kergall
 */
public class FlickrPOIProvider {

  protected String mApiKey;
  
  /**
   * @param apiKey the registered API key to give to Flickr service. 
   * @see http://www.flickr.com/help/api/
   */
  public FlickrPOIProvider(String apiKey){
    mApiKey = apiKey;
  }
  
  private String getUrlInside(BoundingBoxE6 boundingBox, int maxResults){
    StringBuffer url = new StringBuffer("https://api.flickr.com/services/rest/?method=flickr.photos.search");
    url.append("&api_key="+mApiKey);
    url.append("&bbox="+boundingBox.getLonWestE6()*1E-6);
    url.append(","+boundingBox.getLatSouthE6()*1E-6);
    url.append(","+boundingBox.getLonEastE6()*1E-6);
    url.append(","+boundingBox.getLatNorthE6()*1E-6);
    url.append("&has_geo=1");
    url.append("&format=json&nojsoncallback=1");
    url.append("&per_page="+maxResults);
    
    //From Flickr doc: "Geo queries require some sort of limiting agent in order to prevent the database from crying."
    //And min_date_upload is considered as a limiting agent. So:
    url.append("&min_upload_date=2005/01/01");
    
    //Ask to provide some additional attributes we will need:
    url.append("&extras=geo,url_sq");
    url.append("&sort=interestingness-desc");
    return url.toString();
  }
  
  /*
  public POI getPhoto(String photoId){
    String url = "http://api.flickr.com/services/rest/?method=flickr.photos.getInfo"
      + "&api_key=" + mApiKey
      + "&photo_id=" + photoId
      + "&format=json&nojsoncallback=1";
    Log.d(BonusPackHelper.LOG_TAG, "getPhoto:"+url);
    String jString = BonusPackHelper.requestStringFromUrl(url);
    if (jString == null) {
      Log.e(BonusPackHelper.LOG_TAG, "FlickrPOIProvider: request failed.");
      return null;
    }
    try {
      POI poi = new POI(POI.POI_SERVICE_FLICKR);
      JSONObject jRoot = new JSONObject(jString);
      JSONObject jPhoto = jRoot.getJSONObject("photo");
      JSONObject jLocation = jPhoto.getJSONObject("location");
      poi.mLocation = new GeoPoint(
          jLocation.getDouble("latitude"), 
          jLocation.getDouble("longitude"));
      poi.mId = Long.parseLong(photoId);
      JSONObject jTitle = jPhoto.getJSONObject("title");
      poi.mType = jTitle.getString("_content");
      JSONObject jDescription = jPhoto.getJSONObject("description");
      poi.mDescription = jDescription.getString("_content");
      //truncate description if too long:
      if (poi.mDescription.length() > 300){
        poi.mDescription = poi.mDescription.substring(0, 300) + " (...)";
      }
      String farm = jPhoto.getString("farm");
      String server = jPhoto.getString("server");
      String secret = jPhoto.getString("secret");
      JSONObject jOwner = jPhoto.getJSONObject("owner");
      String nsid = jOwner.getString("nsid");
      poi.mThumbnailPath = "http://farm"+farm+".staticflickr.com/"+server+"/"+photoId+"_"+secret+"_s.jpg";
      poi.mUrl = "http://www.flickr.com/photos/"+nsid+"/"+photoId;
      return poi;
    }catch (JSONException e) {
      e.printStackTrace();
      return null;
    }
  }
  */
  
  /**
   * @param fullUrl
   * @return the list of POI
   */
  public ArrayList<POI> getThem(String fullUrl){
    Log.d(BonusPackHelper.LOG_TAG, "FlickrPOIProvider:get:"+fullUrl);
    String jString = BonusPackHelper.requestStringFromUrl(fullUrl);
    if (jString == null) {
      Log.e(BonusPackHelper.LOG_TAG, "FlickrPOIProvider: request failed.");
      return null;
    }
    try {
      JSONObject jRoot = new JSONObject(jString);
      JSONObject jPhotos = jRoot.getJSONObject("photos");
      JSONArray jPhotoArray = jPhotos.getJSONArray("photo");
      int n = jPhotoArray.length();
      ArrayList<POI> pois = new ArrayList<POI>(n);
      for (int i=0; i<n; i++){
        JSONObject jPhoto = jPhotoArray.getJSONObject(i);
        String photoId = jPhoto.getString("id");
        POI poi = new POI(POI.POI_SERVICE_FLICKR);
        poi.mLocation = new GeoPoint(
            jPhoto.getDouble("latitude"), 
            jPhoto.getDouble("longitude"));
        poi.mId = Long.parseLong(photoId);
        poi.mType = jPhoto.getString("title");
        poi.mThumbnailPath = jPhoto.getString("url_sq");
        String owner = jPhoto.getString("owner");
        poi.mUrl = "https://www.flickr.com/photos/"+owner+"/"+photoId;
        pois.add(poi);
      }
      int total = jPhotos.getInt("total");
      Log.d(BonusPackHelper.LOG_TAG, "done:"+n+" got, on a total of:"+total);
      return pois;
    }catch (JSONException e) {
      e.printStackTrace();
      return null;
    }
  }
  
  /**
   * @param boundingBox
   * @param maxResults
   * @return list of POI, Flickr photos inside the bounding box. Null if technical issue. 
   */
  public ArrayList<POI> getPOIInside(BoundingBoxE6 boundingBox, int maxResults){
    String url = getUrlInside(boundingBox, maxResults);
    return getThem(url);
  }
  

}

Java Source Code List

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