fun calculateDistance(lat1: Double, lng1: Double, lat2: Double, lng2: Double): Float { val results = FloatArray(1) Location.distanceBetween(lat1, lng1, lat2, lng2, results) // distance in meter return results[0]}A helper function to show distance as text.
fun distanceText(distance: Float): String { val distanceString: String if (distance < 1000) if (distance < 1) distanceString = String.format(Locale.US, "%dm", 1) else distanceString = String.format(Locale.US, "%dm", Math.round(distance)) else if (distance > 10000) if (distance < 1000000) distanceString = String.format(Locale.US, "%dkm", Math.round(distance / 1000)) else distanceString = "FAR" else distanceString = String.format(Locale.US, "%.2fkm", distance / 1000) return distanceString}Kotlin Extension
fun LatLng.toLocation() = Location("").apply { latitude = latitude longitude = longitude}fun LatLng.distanceTo(latLng: LatLng) = toLocation().distanceTo(latLng.toLocation())val d = latLng1.distanceTo(latLng2)