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 w w  w . j  a v  a 2s . c o m
import android.util.Log;

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 java.util.ArrayList;

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