A-snippet #1 - Smoothing Marker rotating in Google Maps

a_snippet1_1.txt

    /**
     * Smooth rotating my location marker arrow
     * @param marker - marker itself
     * @param newBearing - new direction to rotate
     */
    private fun changeBearingSmoothly(marker: Marker?, newBearing: Float) {
        if (marker == null) {
            return
        }
        val animation = ValueAnimator.ofFloat(0f, 100f)
        var previousStep = 0f
        val deltaLatitude = newBearing - marker.rotation
        animation.duration = 1000
        animation.addUpdateListener { updatedAnimation ->
            val deltaStep = updatedAnimation.animatedValue as Float - previousStep
            previousStep = updatedAnimation.animatedValue as Float
            marker.rotation = (marker.rotation + deltaLatitude * deltaStep * 1 / 100)
        }
        animation.start()
    }