Android Open Source - Andriod-PC-GPSApplication G P S Way Point

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License

The source code is released under:

MIT License

Java Source Code

/**
 * //  w w w . ja  v a2 s.  c om
 */
package com.dev.appxpress.gps.android_pc.domain;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;

/**
 * 
 * Object represents a GPS coordinate at given specific time.
 * 
 * @author NThusitha
 * @date 21-August-2014
 *
 */
public class GPSWayPoint implements GPSAware{

  private Date time;
  private double lat;
  private double lon;
  private double elevation;
  private double accuracy;
  private double bearing;
  private double speed;
  
  
  public GPSWayPoint(Date time, double lat, double lon, double elevation,
      double accuracy, double bearing, double speed) {
    super();
    this.time = time;
    this.lat = lat;
    this.lon = lon;
    this.elevation = elevation;
    this.accuracy = accuracy;
    this.bearing = bearing;
    this.speed = speed;
  }


  public Date getTime() {
    return time;
  }


  public double getLat() {
    return lat;
  }


  public double getLon() {
    return lon;
  }


  public double getElevation() {
    return elevation;
  }


  public double getAccuracy() {
    return accuracy;
  }


  public double getBearing() {
    return bearing;
  }


  public double getSpeed() {
    return speed;
  }
  
  
  /**
   * Collection of waypoints for given period of time.
   * 
   * @author NThusitha
   *
   */
  public static class GPSWayPoints implements GPSAware{
    
    private List<GPSWayPoint> waypoints = new ArrayList<GPSWayPoint>();
    
    public GPSWayPoints(){
      
    }
    
    public void addWayPoints(GPSWayPoint waypoint){
      if(waypoint != null){
        waypoints.add(waypoint);
      }
      
    }

    /**
     * @return
     */
    public List<GPSWayPoint> getWaypoints() {
      return waypoints;
    }
    
    
    /**
     * 
     * This is an expensive operation, invoke it less frequently.
     * @return
     */
    public List<GPSWayPoint> getSortedWaypoints(){
      Collections.sort(waypoints, new GPSWayPointCompartor());
      return waypoints;
    }
    
  
    
    
    
  }
  
  
  /**
   * GPS Way Point comparator which compare way points for ordering.
   * 
   * Baseline ordering is performed on time stamp.
   * If time stamp equality has found then fall back to the way point equality.
   * @author NThusitha
   *
   */
  public static class GPSWayPointCompartor implements Comparator<GPSWayPoint>{

    @Override
    public int compare(GPSWayPoint o1, GPSWayPoint o2) {

      //order the GPSWayPoints according to the time stamp
      int comparison = 0;
      if(o1 != null && o2 != null){
        
        int dateComparison = 0;
        dateComparison = o1.getTime().compareTo(o2.getTime());
        // 0 is a special case.
        if(dateComparison == 0){
          
          if(o1.getLat() == o2.getLat() && o1.getLon() == o2.getLon()){
            //the two objects regarded as equal.
            comparison = 0;
          }else{
            //if lat & lon equality mismatch fall back to date comparison
            comparison = dateComparison;
          }
        }else{
          
          return dateComparison;
        }
      }
      
      return comparison;
    }
    
  }
  
  
  
  
}

Java Source Code List

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