Android get bearing from two locations

MapExtensions.kt

fun getBearing(begin: LatLng, end: LatLng): Float {
    val lat = abs(x = begin.latitude - end.latitude)
    val lng = abs(x = begin.longitude - end.longitude)

    if (begin.latitude < end.latitude && begin.longitude < end.longitude)
        return (Math.toDegrees(Math.atan(lng / lat)).toFloat())
    else if (begin.latitude >= end.latitude && begin.longitude < end.longitude)
        return (((90 - Math.toDegrees(Math.atan(lng / lat))) + 90).toFloat())
    else if (begin.latitude >= end.latitude && begin.longitude >= end.longitude)
        return ((Math.toDegrees(Math.atan(lng / lat)) + 180).toFloat())
    else if (begin.latitude < end.latitude && begin.longitude >= end.longitude)
        return (((90 - Math.toDegrees(Math.atan(lng / lat))) + 270).toFloat())
    return -1f
}