Android Open Source - geocamMobileForAndroid Gpx Writer

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Back to project page geocamMobileForAndroid.

License

The source code is released under:

NASA OPEN SOURCE AGREEMENT VERSION 1.3 THIS OPEN SOURCE AGREEMENT ("AGREEMENT") DEFINES THE RIGHTS OF USE, REPRODUCTION, DISTRIBUTION, MODIFICATION AND REDISTRIBUTION OF CERTAIN COMPUTER SOFTWARE ORI...

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Java Source Code

// __BEGIN_LICENSE__
// Copyright (C) 2008-2010 United States Government as represented by
// the Administrator of the National Aeronautics and Space Administration.
// All Rights Reserved.
// __END_LICENSE__
//from   ww  w .j ava 2s  .co m
package gov.nasa.arc.geocam.geocam;

import java.io.StringWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class GpxWriter extends StringWriter {
  private static final String PREAMBLE =
    "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
    "<gpx " +
       "version=\"1.1\" " +
       "creator=\"GeoCamMobile\" " +
       "xmlns=\"http://www.topografix.com/GPX/1/0\" " +
       "xmlns:geocam=\"http://geocam.arc.nasa.gov/schema/gpxExtensions/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 String POSTAMBLE = "</gpx>\n";
  
  private static final String TRACK_START = "<trk>";
  private static final String TRACK_END = "</trk>";

  private static final String TRACK_SEG_START = "<trkseg>";
  private static final String TRACK_SEG_END = "</trkseg>";
  
  public GpxWriter() {
    super();
    
    this.append(PREAMBLE);
  }
  
  public void startTrack(String notes) {
    this.append(TRACK_START)
      .append("<desc>").append(notes).append("</desc>");
  }
  
  public void startSegment() {
    this.append(TRACK_SEG_START);
  }
  
  public void append(double lat, double lon, double alt, long time) {
    this.append("<trkpt")
      .append(" lat=\"").append(Double.toString(lat)).append("\"")
      .append(" lon=\"").append(Double.toString(lon)).append("\"")
      .append(">");
    this.append("<time>").append(dateToISO8601(time)).append("</time>");
    this.append("<ele>").append(Double.toString(alt)).append("</ele>");
    this.append("</trkpt>");
  }
  
  public void endSegment() {
    this.append(TRACK_SEG_END);
  }
  
  public void endTrack() {
    this.append(TRACK_END);
  }
  
  public void startTrackExtensions() {
    this.append("<extensions>");
  }
  
  public void appendIcon(String icon) {
    this.append("<geocam:icon>" + icon + "</geocam:icon>");
  }

  public void appendSolidDashed(boolean dashed) {
    this.append("<geocam:lineStyle>");
    if (dashed) {
      this.append("dashed");
    } else {
      this.append("solid");
    }
    
    this.append("</geocam:lineStyle>");
  }
  
  public void appendColor(int argbColor) {
    // This will be in ARGB (android color), convert to RGBA (html-ish)
    int rgbaColor = Integer.rotateLeft(argbColor, 8);
    this.append("<geocam:lineColor>#" + Integer.toHexString(rgbaColor) + "</geocam:lineColor>");
  }
  
  public void appendUID(String uid) {
    this.append("<geocam:uid>" + uid + "</geocam:uid>");
  }
  
  public void endTrackExtensions() {
    this.append("</extensions>");
  }
  
  public String toString() {
    return super.toString() + POSTAMBLE;
  }
  
  private static final SimpleDateFormat ISO_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.S'Z'");
  static {
    ISO_DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("GMT"));
  }
  
  // Convert a system-given millisecond timestamp to
  // a string that I can dump into sqlite. (UTC)
  public static String dateToISO8601(long time) {
    return ISO_DATE_FORMAT.format(new Date(time));
  }
  
}

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