Question

I’m working on Google Maps, and I’ve managed to place about 73 pinpoint from sqllite DB on the map which they present a places for stores in the current user city.

Now I have to show only the closet five places to user not all the 73 place.Does any one have an idea or a solution for this.

Answer 1

First, calculate distances between user location and all places.

To get user location read this guide Location strategies

Create a class for your place with a method to calculate a distance between it and user location:

public class Place {
    public Location location;
    private float distanceToUser;

    public Place(Location _loc){
        location = _loc;
    }

    public void calculateDistance(Location userLocation){
        distanceToUser = location.distanceTo(userLocation);
    }
}

Here, distanceTo method was called: read about distanceTo

Now, create Place[] array and initialize it with all your places from database. For each place call calculateDistance method.

After that, sort your array using Arrays.sort( Arrays.sort )

Show on the map only first five places from your array

Done!