Android Open Source - ActivityTracker G P X File Writer

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License

The source code is released under:

GNU General Public License

Java Source Code

package biz.bokhorst.activitytracker;
/*from   w  w  w.j  a  v a2s. c  o m*/
/*
 Copyright 2011-2014 Marcel Bokhorst
 All Rights Reserved

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;

import biz.bokhorst.activitytracker.DatabaseHelper.ActivityData;

public class GPXFileWriter {

  // Some constants
  private static final String XML_HEADER = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>";
  private static final String TAG_GPX = "<gpx"
      + " xmlns=\"http://www.topografix.com/GPX/1/1\""
      + " version=\"1.1\""
      + " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\""
      + " xsi:schemaLocation=\"http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd\">";
  private static final SimpleDateFormat POINT_DATE_FORMATTER = new SimpleDateFormat(
      "yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.getDefault());

  public static void writeGpxFile(String trackName,
      List<ActivityData> activities, File target) throws IOException {
    FileWriter fw = new FileWriter(target);
    fw.write(XML_HEADER + "\n");
    fw.write(TAG_GPX + "\n");
    writeTrackPoints(trackName, fw, activities);
    fw.write("</gpx>");
    fw.close();
  }

  private static void writeTrackPoints(String trackName, FileWriter fw,
      List<ActivityData> listActivity) throws IOException {
    fw.write("\t" + "<trk>" + "\n");
    fw.write("\t\t" + "<name>" + trackName + "</name>" + "\n");
    fw.write("\t\t" + "<trkseg>" + "\n");

    for (ActivityData data : listActivity)
      if (data.type == ActivityData.TYPE_TRACKPOINT) {
        StringBuffer out = new StringBuffer();
        out.append("\t\t\t" + "<trkpt lat=\""
            + data.location.getLatitude() + "\" " + "lon=\""
            + data.location.getLongitude() + "\">" + "\n");
        out.append("\t\t\t\t" + "<ele>" + data.location.getAltitude()
            + "</ele>" + "\n");
        out.append("\t\t\t\t" + "<time>"
            + POINT_DATE_FORMATTER.format(new Date(data.time))
            + "</time>" + "\n");
        out.append("\t\t\t\t" + "<cmt>speed="
            + data.location.getSpeed() + "</cmt>" + "\n");
        out.append("\t\t\t\t" + "<hdop>" + data.location.getAccuracy()
            + "</hdop>" + "\n");
        out.append("\t\t\t" + "</trkpt>" + "\n");

        fw.write(out.toString());
      }

    fw.write("\t\t" + "</trkseg>" + "\n");
    fw.write("\t" + "</trk>" + "\n");
  }
}

Java Source Code List

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