CODEWITHSUNDEEP
javaandroidgoogle-mapsgoogle-maps-android-api-2
tsteve
tsteve

Reputation: 549

Find closest longitude and latitude in array from user location - Android Studio

The following piece of code was instrumental to an iOS app I finished recently:

var closestLocation: CLLocation?
var smallestDistance: CLLocationDistance?

for location in locations {
  let distance = currentLocation.distanceFromLocation(location)
  if smallestDistance == nil || distance < smallestDistance {
    closestLocation = location
    smallestDistance = distance
  }
}

My question is pretty simple: how would this piece of code look in Java for Android Studio?

This is my first run at Java and Android Studio, so any help would be greatly appreciated.

Upvotes: 1

Views: 9550

Answers (3)

Leonid Veremchuk
Leonid Veremchuk

Reputation: 1963

Location closestLocation = null;
float smallestDistance = -1;

for(Location location:mLocationsList){
float distance  = currentLocation.distanceTo(location);
 if(smallestDistance == -1 || distance < smallestDistance) {
    closestLocation = location
    smallestDistance = distance
  }
}

With mLocationsList being an iterable collection of Location-objects and currentLocation being already set

Upvotes: 2

Jyotman Singh
Jyotman Singh

Reputation: 11330

You should consider using the Location class. It is used to store locations in Latitude and Longitude. It also has predefined function for calculating distance between points - distanceBetween(). 

Location closestLocation;
int smallestDistance = -1;

Assuming locations is an ArrayList<Location>()

for(Location location : locations){
    int distance = Location.distanceBetween(closestLocation.getLatitude(),
                           closestLocation.getLongitude(),
                           location.getLatitude(),
                           location.getLongitude());
    if(smallestDistance == -1 || distance < smallestDistance){
        closestLocation = location;
        smallestDistance = distance;
    }
}

Upvotes: 4

siyb
siyb

Reputation: 2947

It would look something like this (locations need to be iterable and userLocation must be set):

    Location closest;
    float smallestDistance = Float.MAX_VALUE;
    for (Location l : locations) {
        float dist = l.distanceTo(userLocation);
        if (dist < smallestDistance) {
            closest = l;
            smallestDistance = dist;
        }
    }

Upvotes: 1

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