GPXUtilities.java :  » Map » osmand » net » osmand » Android Open Source

package net.osmand;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.TimeZone;

import org.apache.commons.logging.Log;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;

import android.content.Context;
import android.location.Location;
import android.util.Xml;
import android.widget.Toast;

public class GPXUtilities {
  public final static Log log = LogUtil.getLog(GPXUtilities.class);
  
  
  
  public final static String GPX_TIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ss'Z'";  //$NON-NLS-1$
  
  public static class TrkPt {
    public double lat;
    public double lon;
    public double ele;
    public double speed;
    public long time;
  }
  
  public static class WptPt {
    public double lat;
    public double lon;
    public String name;
  }
  
  
  public static boolean saveToXMLFiles(File fout, List<WptPt> data, Context ctx ){
    try {
      FileOutputStream output = new FileOutputStream(fout);
      XmlSerializer serializer = Xml.newSerializer();
      serializer.setOutput(output, "UTF-8"); //$NON-NLS-1$
      serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); //$NON-NLS-1$
      serializer.startDocument("UTF-8", true); //$NON-NLS-1$
      serializer.startTag(null, "gpx"); //$NON-NLS-1$
      serializer.attribute(null, "version", "1.1"); //$NON-NLS-1$ //$NON-NLS-2$
      serializer.attribute(null, "creator", Version.APP_NAME_VERSION); //$NON-NLS-1$
      serializer.attribute("xmlns", "xsi", "http://www.w3.org/2001/XMLSchema-instance"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
      serializer.attribute("xsi", "schemaLocation", "http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
      serializer.attribute(null, "xmlns", "http://www.topografix.com/GPX/1/1"); //$NON-NLS-1$ //$NON-NLS-2$

      for (WptPt l : data) {
        serializer.startTag(null, "wpt"); //$NON-NLS-1$
        serializer.attribute(null, "lat", l.lat + ""); //$NON-NLS-1$ //$NON-NLS-2$
        serializer.attribute(null, "lon", l.lon + ""); //$NON-NLS-1$ //$NON-NLS-2$
        serializer.startTag(null, "name"); //$NON-NLS-1$
        serializer.text(l.name);
        serializer.endTag(null, "name"); //$NON-NLS-1$
        serializer.endTag(null, "wpt"); //$NON-NLS-1$
      }

      serializer.endTag(null, "gpx"); //$NON-NLS-1$
      serializer.flush();
      serializer.endDocument();

      return true;
    } catch (RuntimeException e) {
      log.error("Error saving gpx", e); //$NON-NLS-1$
      Toast.makeText(ctx, ctx.getString(R.string.error_occurred_saving_gpx), Toast.LENGTH_LONG).show();
      return false;
    } catch (IOException e) {
      log.error("Error saving gpx", e); //$NON-NLS-1$
      Toast.makeText(ctx, ctx.getString(R.string.error_occurred_saving_gpx), Toast.LENGTH_LONG).show();
      return false;
    }
    
  }
  
  public static String saveToXMLFiles(File dir, Map<String, List<List<TrkPt>>> data, Context ctx){
    SimpleDateFormat format = new SimpleDateFormat(GPX_TIME_FORMAT);
    format.setTimeZone(TimeZone.getTimeZone("UTC"));
    try {
      for (String f : data.keySet()) {
        File fout = new File(dir, f + ".gpx"); //$NON-NLS-1$
        int ind = 1;
        while(fout.exists()){
          fout = new File(dir, f + "_"+(++ind)+".gpx"); //$NON-NLS-1$ //$NON-NLS-2$
        }
        FileOutputStream output = new FileOutputStream(fout);
        XmlSerializer serializer = Xml.newSerializer();
        serializer.setOutput(output, "UTF-8"); //$NON-NLS-1$
        serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); //$NON-NLS-1$
        serializer.startDocument("UTF-8", true); //$NON-NLS-1$
        serializer.startTag(null, "gpx"); //$NON-NLS-1$
        serializer.attribute(null, "version", "1.1"); //$NON-NLS-1$ //$NON-NLS-2$
        serializer.attribute(null, "creator", Version.APP_NAME_VERSION); //$NON-NLS-1$
        serializer.attribute("xmlns", "xsi", "http://www.w3.org/2001/XMLSchema-instance"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
        serializer.attribute("xsi", "schemaLocation", "http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
        serializer.attribute(null, "xmlns", "http://www.topografix.com/GPX/1/1"); //$NON-NLS-1$ //$NON-NLS-2$
        
        serializer.startTag(null, "trk"); //$NON-NLS-1$
        for(List<TrkPt> l : data.get(f)){
          serializer.startTag(null, "trkseg"); //$NON-NLS-1$
          for(TrkPt p : l){
            serializer.startTag(null, "trkpt"); //$NON-NLS-1$
            serializer.attribute(null, "lat", p.lat+""); //$NON-NLS-1$ //$NON-NLS-2$
            serializer.attribute(null, "lon", p.lon+""); //$NON-NLS-1$ //$NON-NLS-2$
            serializer.startTag(null, "time"); //$NON-NLS-1$
            serializer.text(format.format(new Date(p.time)));
            serializer.endTag(null, "time"); //$NON-NLS-1$
            serializer.startTag(null, "ele"); //$NON-NLS-1$
            serializer.text(p.ele+""); //$NON-NLS-1$
            serializer.endTag(null, "ele"); //$NON-NLS-1$
            if (p.speed > 0) {
              serializer.startTag(null, "speed"); //$NON-NLS-1$
              serializer.text(p.speed + ""); //$NON-NLS-1$
              serializer.endTag(null, "speed"); //$NON-NLS-1$
            }
            
            serializer.endTag(null, "trkpt"); //$NON-NLS-1$
          }
          serializer.endTag(null, "trkseg"); //$NON-NLS-1$
        }
        serializer.endTag(null, "trk"); //$NON-NLS-1$
        
        serializer.endTag(null, "gpx"); //$NON-NLS-1$
        serializer.flush();
        serializer.endDocument();
      }
      return null;
    } catch (RuntimeException e) {
      log.error("Error saving gpx", e); //$NON-NLS-1$
      return ctx.getString(R.string.error_occurred_saving_gpx);
    } catch (IOException e) {
      log.error("Error saving gpx", e); //$NON-NLS-1$
      return ctx.getString(R.string.error_occurred_saving_gpx);
    }
  }
  
  
  public static class GPXFileResult {
    public ArrayList<List<Location>> locations = new ArrayList<List<Location>>();
    public ArrayList<WptPt> wayPoints = new ArrayList<WptPt>();
    // special case for cloudmate gpx : they discourage common schema
    // by using waypoint as track points and rtept are not very close to real way
    // such as wpt. However they provide additional information into gpx.
    public boolean cloudMadeFile;
    public String error;
  }
  
  public static GPXFileResult loadGPXFile(Context ctx, File f){
    GPXFileResult res = new GPXFileResult();
    try {
      boolean cloudMade = false;
      XmlPullParser parser = Xml.newPullParser();
      parser.setInput(new FileInputStream(f), "UTF-8"); //$NON-NLS-1$
      
      int tok;
      Location current = null;
      String currentName = ""; //$NON-NLS-1$
      while ((tok = parser.next()) != XmlPullParser.END_DOCUMENT) {
        if (tok == XmlPullParser.START_TAG) {
          if (parser.getName().equals("copyright")) { //$NON-NLS-1$
            cloudMade |= "cloudmade".equalsIgnoreCase(parser.getAttributeValue("", "author")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$

          } else if (parser.getName().equals("trkseg")) { //$NON-NLS-1$
            res.locations.add(new ArrayList<Location>());
          } else if (parser.getName().equals("wpt") || parser.getName().equals("trkpt") || //$NON-NLS-1$//$NON-NLS-2$
              (!cloudMade && parser.getName().equals("rtept"))) { //$NON-NLS-1$
            // currently not distinguish different point represents all as a line
            try {
              currentName = ""; //$NON-NLS-1$
              current = new Location("gpx_file"); //$NON-NLS-1$
              current.setLatitude(Double.parseDouble(parser.getAttributeValue("", "lat"))); //$NON-NLS-1$ //$NON-NLS-2$
              current.setLongitude(Double.parseDouble(parser.getAttributeValue("", "lon"))); //$NON-NLS-1$ //$NON-NLS-2$
            } catch (NumberFormatException e) {
              current = null;

            }
          } else if (current != null && parser.getName().equals("name")) { //$NON-NLS-1$
            if (parser.next() == XmlPullParser.TEXT) {
              currentName = parser.getText();
            }
          }
        } else if (tok == XmlPullParser.END_TAG) {
          if (parser.getName().equals("wpt") || //$NON-NLS-1$
              parser.getName().equals("trkpt") || (!cloudMade && parser.getName().equals("rtept"))) { //$NON-NLS-1$ //$NON-NLS-2$ 
            if (current != null) {
              if (parser.getName().equals("wpt") && !cloudMade) { //$NON-NLS-1$
                WptPt pt = new WptPt();
                pt.lat = current.getLatitude();
                pt.lon = current.getLongitude();
                pt.name = currentName;
                res.wayPoints.add(pt);
              } else {
                if (res.locations.isEmpty()) {
                  res.locations.add(new ArrayList<Location>());
                }
                res.locations.get(res.locations.size() - 1).add(current);
              }
            }
          }
        }
      }
    } catch (XmlPullParserException e) {
      log.error("Error reading gpx", e); //$NON-NLS-1$
      res.error = ctx.getString(R.string.error_reading_gpx);
    } catch (IOException e) {
      log.error("Error reading gpx", e); //$NON-NLS-1$
      res.error = ctx.getString(R.string.error_reading_gpx);
    }
    
    return res;
  }

}