@Override
    public void onLocationChanged(Location loc) {
    /* Get current speed */
        loc.getSpeed();

    /* Assign speed value to double variable in meter/sec, convert to miles/hr, and convert to string*/
        float currentSpeedInMeterPerSecond = loc.getSpeed();
        float currentSpeed = currentSpeedInMeterPerSecond * 2.237f;

        currentSpeedMPHInt = Math.round(currentSpeed);
        currentSpeedString = Integer.toString(currentSpeedMPHInt);

    /* Print out current speed */
        TextView currentSpeedText = (TextView) findViewById(R.id.speed);
        currentSpeedText.setText(currentSpeedString);

    /* Get headwind, frontal area, drag coefficent (Cd), rolling coeffiecent (Cr) */
        mySharedPreferences = getSharedPreferences(MY_PREFS, prefMode);
        headWindString = mySharedPreferences.getString("keyheadWindString", "0");
        headWind = new Float(headWindString);

        frontalAreaString = mySharedPreferences.getString("keyfrontalAreaString", "6.6");
        frontalArea = new Float(frontalAreaString);

        dragCoefficentString = mySharedPreferences.getString("keydragCoefficentString", "1.15");
        dragCoefficent = new Float(dragCoefficentString);

        riderWeightString = mySharedPreferences.getString("keyriderWeightString", "205");
        riderWeight = new Float(riderWeightString);

        bikeWeightString = mySharedPreferences.getString("keybikeWeightString", "30");
        bikeWeight = new Float(bikeWeightString);

        rollingCoefficentString = mySharedPreferences.getString("keyrollingCoefficentString", "0.0075");
        rollingCoefficent = new Float(rollingCoefficentString);

    /* get current time and location and speed and altitude*/
        System.currentTimeMillis();
        loc.getLatitude();
        loc.getLongitude();
        loc.getAltitude();

    /* Set start time and location */
        if (i < j) {
            i = i + 1;
            time1 = System.currentTimeMillis();
            altitudeStart = loc.getAltitude();
            altitudeA = loc.getAltitude();
            latA = loc.getLatitude();
            logA = loc.getLongitude();
            Location.distanceBetween(latA, logA, latB, logB, distance);
        } else {

        /* Get new location and time*/
            timeNew = System.currentTimeMillis();
            latB = loc.getLatitude();
            logB = loc.getLongitude();
            altitudeB = loc.getAltitude();

        /* Get distance between point A and point B*/
            Location.distanceBetween(latA, logA, latB, logB, distance);
            distanceTraveledMeters = distance[0];           /* distance between A and B in meters*/
            distanceTraveledMiles = distanceTraveledMeters * 0.0006213712f;
            if (distanceTraveledMiles < 0.02f) {
                distanceTraveledMiles = 0f;
            }
         /* Get and find time, total distance, average power , average speed, total Kcal, total elevation diff*/
            timeinterval = timeNew - time1;
            timeintervalSec = timeinterval / 1000f;
            tripTimeTotalmin = tripTimeTotalmin + (timeintervalSec / 60f);
            totalDistance = totalDistance + distanceTraveledMiles;
            averageSpeed = totalDistance / (tripTimeTotalmin / 60f);
            elevChange = (((altitudeB + altitudeA) / 2) - altitudeStart) * 3.2808d;
            elevChangeFloat = (float) elevChange;
            powerElevationChangeWattsAve = ((((riderWeight + bikeWeight) * 32.174f) * elevChangeFloat) / tripTimeTotalmin) * 0.00070234f;
            intervalSpeedMPH = distanceTraveledMiles / (timeintervalSec / 3600f);
            powerAirResistanceWattsAve = (0.5f * dragCoefficent * 0.075f * ((averageSpeed + headWind) * (averageSpeed + headWind)) * frontalArea * (averageSpeed + headWind)) * 0.13295f;
            powerRollingResistanceWattsAve = rollingCoefficent * (riderWeight + bikeWeight) * 32.174f * averageSpeed * 0.062f;
            powerTotalWattsAve = powerElevationChangeWattsAve + powerAirResistanceWattsAve + powerRollingResistanceWattsAve;
            totalKcalBurned = (powerTotalWattsAve * tripTimeTotalmin * 0.01433f) / 0.24f;
            mechBtuUsed = powerTotalWattsAve * tripTimeTotalmin * 0.056869f;

         /*Round off values*/
            totalDistance = totalDistance * 10f;
            totalDistance = Math.round(totalDistance);
            totalDistance = totalDistance / 10f;

            tripTimeMin = Math.round(tripTimeTotalmin);
            timeintervalSec = Math.round(timeintervalSec);
            averageSpeedInt = Math.round(averageSpeed);
            powerTotalWattsInt = Math.round(powerTotalWattsAve);
            totalKcalBurnedInt = Math.round(totalKcalBurned);
            intervalSpeedMPHInt = Math.round(intervalSpeedMPH);
            mechBtuUsedInt = Math.round(mechBtuUsed);
            elevChangeInt = Math.round(elevChangeFloat);

         /*convert to stings*/
            totalDistanceString = Float.toString(totalDistance);
            tripTimeTotalminString = Integer.toString(tripTimeMin);
            averageSpeedString = Integer.toString(averageSpeedInt);
            powerTotalWattsString = Integer.toString(powerTotalWattsInt);
            totalKcalBurnedString = Integer.toString(totalKcalBurnedInt);
            mechBtuUsedString = Integer.toString(mechBtuUsedInt);
            elevChangeString = Integer.toString(elevChangeInt);

         /* Print out */
            TextView totalDistanceText = (TextView) findViewById(R.id.distance);
            totalDistanceText.setText(totalDistanceString);
            TextView tripTimeTotalminText = (TextView) findViewById(R.id.triptime);
            tripTimeTotalminText.setText(tripTimeTotalminString);
            TextView averageSpeedText = (TextView) findViewById(R.id.avespeed);
            averageSpeedText.setText(averageSpeedString);
            TextView powerTotalWattsText = (TextView) findViewById(R.id.watts);
            powerTotalWattsText.setText(powerTotalWattsString);
            TextView totalKcalBurnedText = (TextView) findViewById(R.id.burnedkcal);
            totalKcalBurnedText.setText(totalKcalBurnedString);
            TextView mechBtuUsedText = (TextView) findViewById(R.id.mechbtu);
            mechBtuUsedText.setText(mechBtuUsedString);
            TextView elevChangeText = (TextView) findViewById(R.id.elevchange);
            elevChangeText.setText(elevChangeString);

         /*reset start time and location and interval elevation */
            time1 = timeNew;
            latA = latB;
            logA = logB;
            altitudeA = altitudeB;

         /* check iterations*/
            k = k + 1;
            kString = Integer.toString(k);
            TextView kStringText = (TextView) findViewById(R.id.k);
            kStringText.setText(kString);
        }
    }

public final LocationListener locationListener = new LocationListener() {
    public void onLocationChanged(Location location) {
        SimpleDateFormat s = new SimpleDateFormat("hh:mm:ss");
        String timeStamp = s.format(new Date());

07-23 15:50:58.110: I/LocationListener(27513): Time of location change: 03:50:58. Latitude: 35.3597361 Longitude: -76.4046144