Android Find Latitude Longitude Of X point From Defined Location

Question

i m working on Android MapView and developing a map based Application. i Need to find an X distance from the Specific Co-ordinates. Di

Answer 1

Just to make the answer from javram into meters and radians instead of degrees.

/**
 * Create a new location specified in meters and bearing from a previous location.
 * @param startLoc from where
 * @param bearing which direction, in radians from north
 * @param distance meters from startLoc
 * @return a new location
 */
public static Location createLocation(Location startLoc, double bearing, double distance) {
    Location newLocation = new Location("newLocation");

    double radius = 6371000.0; // earth's mean radius in m
    double lat1 = Math.toRadians(startLoc.getLatitude());
    double lng1 = Math.toRadians(startLoc.getLongitude());
    double lat2 = Math.asin(Math.sin(lat1) * Math.cos(distance / radius) + Math.cos(lat1) * Math.sin(distance / radius) * Math.cos(bearing));
    double lng2 = lng1 + Math.atan2(Math.sin(bearing) * Math.sin(distance / radius) * Math.cos(lat1), Math.cos(distance / radius) - Math.sin(lat1) * Math.sin(lat2));
    lng2 = (lng2 + Math.PI) % (2 * Math.PI) - Math.PI;

    // normalize to -180...+180
    if (lat2 == 0 || lng2 == 0) {
        newLocation.setLatitude(0.0);
        newLocation.setLongitude(0.0);
    } else {
        newLocation.setLatitude(Math.toDegrees(lat2));
        newLocation.setLongitude(Math.toDegrees(lng2));
    }

    return newLocation;
}