get Nearest City by Location - Android Map

Android examples for Map:City Location

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  4. City Location

Description

get Nearest City by Location

Demo Code


import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationManager;
import com.android.doublegissearch.model.Project;

public class Main{
    private static final int EARTH_RADIUS = 6371;
    public static String getNearestCity(Location currentLocation,
            Project[] result) {//  w  w  w .  j  a  v  a2s  . c o  m
        double minDistance = -1;
        String city = null;
        double lat1 = Math.toRadians(currentLocation.getLatitude());
        double lon1 = Math.toRadians(currentLocation.getLongitude());
        for (Project project : result) {
            String location = project.centroid.replace("POINT(", "");
            location = location.replace(")", "");
            String[] points = location.split(" ");
            double lon2 = Double.parseDouble(points[0]);
            double lat2 = Double.parseDouble(points[1]);
            lat2 = Math.toRadians(lat2);
            lon2 = Math.toRadians(lon2);
            double distance = Math.acos(Math.sin(lat1) * Math.sin(lat2)
                    + Math.cos(lat1) * Math.cos(lat2)
                    * Math.cos(lon1 - lon2))
                    * EARTH_RADIUS;
            if (minDistance == -1) {
                minDistance = distance;
                continue;
            }
            if (distance < minDistance) {
                minDistance = distance;
                city = project.name;
            }
        }
        return city;
    }
}

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