Question

I am working on gps tracking in android to track the user location and provide the feature to record the track.I am able to draw path now i want to calculate the track distance and time with that like suppose user start tracking record and move to another location now i want to calculate total distance and time travel for from start to end position (with user location update) in google map. I have function which calculate the distance for 2 position but that not fit for my route, because route are in polyline and it’s flexible lat/lng position. is their any api or any function or services provide by google for that. any help or suggestion are appreciate.

Answer 1

I would create a class called waypoint

class WayPoint
{
   DateTime depart; //some date time container
   DateTime arrive; //some date time container
   Coordinate position; //some gps coordinate
}

Then create a list of these classes which allows inserting of elements at any position which is helpful if your route changes:

List<WayPoint> journey = new ArrayList<WayPoint>();

//just add your waypoints

journey.add(startWayPoint);
journey.add(wayPoint_1);
journey.add(wayPoint_2);
//...
journey.add(wayPoint_n_minus_2);
journey.add(wayPoint_n_minus_1);
journey.add(endWayPoint);

Then convert to array and calculate the totals:

WayPoint[] wayPoints = journey.toArray();

double total_distance = 0.0f; //distance in metres
double total_travel_time = 0.0f; // time in hours

//start at index 1 because there are n-1 segments
if(wayPoints.length>1)
foreach(int i=1; i<wayPoints.length;i++)
{
  total_distance += calcDistanceBetween(
      wayPoints[i-1].position,
      wayPoints[i].position);

  total_time += calcTimeInHoursBetween(
      wayPoints[i-1].depart,
      wayPoints[i].arrive);
}

log.d("Total Distance",String.valueOf(total_distance));
log.d("Total Travel Time",String.valueOf(total_travel_time));