How can I calculate distance between multiple latitude and longitude?

Question

I want to calculate total distance between each points both contains lat and long, these points are stored in local database, so the scenario is I want to calculate distance fro

Answer 1

you can calculate distance between 2 location points without using places api

    private double distance(double lat1, double lon1, double lat2, double lon2) {
        double theta = lon1 - lon2;
        double dist = Math.sin(deg2rad(lat1)) 
                        * Math.sin(deg2rad(lat2))
                        + Math.cos(deg2rad(lat1))
                        * Math.cos(deg2rad(lat2))
                        * Math.cos(deg2rad(theta));
        dist = Math.acos(dist);
        dist = rad2deg(dist);
        dist = dist * 60 * 1.1515;
        return (dist);
    }

    private double deg2rad(double deg) {
        return (deg * Math.PI / 180.0);
    }

    private double rad2deg(double rad) {


return (rad * 180.0 / Math.PI);
}