Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import android.location.Location;

import java.util.ArrayList;

public class Main {
    private static final float MILES_TO_METER_CONVERSION = (float) 1609.344;

    /**
     * Given a list of coordinates, calculate the total distance travelled.
     *
     * @param gpsCoordArray ArrayList of Location objects. Users route
     * @return Integer total distance in meters.
     */
    public static int calculateTotalDistance(ArrayList<Location> gpsCoordArray) {
        int totalDistance = 0;

        for (int i = 1; i < gpsCoordArray.size(); i++) {
            totalDistance += getDistance(gpsCoordArray.get(i - 1), gpsCoordArray.get(i));
        }

        return totalDistance;
    }

    /**
     * Returns the distance between two given locations in meters.
     *
     * @param loc1 First location object
     * @param loc2 Second location object
     * @return distance between Loc1 & Loc2 in meters.
     */
    public static float getDistance(Location loc1, Location loc2) {
        double lat1 = loc1.getLatitude();
        double lng1 = loc1.getLongitude();
        double lat2 = loc2.getLatitude();
        double lng2 = loc2.getLongitude();

        double earthRad = 6371; //kilometers
        double dLatitude = Math.toRadians(lat2 - lat1);
        double dLongitude = Math.toRadians(lng2 - lng1);
        double a = Math.sin(dLatitude / 2) * Math.sin(dLatitude / 2) + Math.cos(Math.toRadians(lat1))
                * Math.cos(Math.toRadians(lat2)) * Math.sin(dLongitude / 2) * Math.sin(dLongitude / 2);
        double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
        float dist = (float) (earthRad * c);

        dist = dist * MILES_TO_METER_CONVERSION;

        return dist;
    }
}