Function to calcule distance in meters

calcule_distance_meters.txt

public String calculeDistance(){
		String distance = null;

		double earthR = 6371;
		double lati = Math.PI/180*(mMyLatitude - mPoi.getPoiLatitude());
		double longi = Math.PI/180*(mMyLongitude - mPoi.getPoiLongitude());
		double a =
				Math.sin(lati/2) * Math.sin(lati/2)+
						Math.cos(Math.toRadians(mPoi.getPoiLatitude())) * Math.cos(Math.toRadians(mMyLatitude)) *
								Math.sin(longi/2) * Math.sin(longi/2);
		double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
		double d = earthR * c * 1000;

		Log.i("Distancia do ponto: ", "" + d + " Km");

		distance = ""+d;
		((TextView) findViewById(R.id.markerDistance)).setText("A "+Math.ceil(d)+" metros.");
		return distance;
	}