Add bouncy effect to any recyclerview

AnyRecyclerView.kt

    // add bouncy effect to this view

    var overscrollAnimationSize = 0.5f

    var flingAnimationSize = 0.5f

    @Suppress("MemberVisibilityCanBePrivate")
    var dampingRatio = SpringForce.DAMPING_RATIO_NO_BOUNCY
        set(value)
        {
            field = value
            this.spring.spring = SpringForce()
                .setFinalPosition(0f)
                .setDampingRatio(value)
                .setStiffness(stiffness)
        }

    @Suppress("MemberVisibilityCanBePrivate")
    var stiffness = SpringForce.STIFFNESS_LOW
        set(value)
        {
            field = value
            this.spring.spring = SpringForce()
                .setFinalPosition(0f)
                .setDampingRatio(dampingRatio)
                .setStiffness(value)
        }


    var spring: SpringAnimation = SpringAnimation(this, SpringAnimation.TRANSLATION_Y)
        .setSpring(
            SpringForce()
                .setFinalPosition(0f)
                .setDampingRatio(dampingRatio)
                .setStiffness(stiffness)
        )


    var touched: Boolean = false

    var orientation : Int? = 1
        set(value)
        {
            field = value
            setupDirection(value)

        }
    override fun setLayoutManager(layout: LayoutManager?)
    {
        super.setLayoutManager(layout)
        if (layout is LinearLayoutManager)
        {
            orientation = layout.orientation
            setupDirection(orientation)
        }
    }
    private fun setupDirection(orientation : Int?)
    {
        if (stiffness > 0)
        {
            when (orientation)
            {
                HORIZONTAL -> spring = SpringAnimation(this, SpringAnimation.TRANSLATION_X)
                    .setSpring(SpringForce()
                        .setFinalPosition(0f)
                        .setDampingRatio(dampingRatio)
                        .setStiffness(stiffness))

                VERTICAL -> spring = SpringAnimation(this, SpringAnimation.TRANSLATION_Y)
                    .setSpring(SpringForce()
                        .setFinalPosition(0f)
                        .setDampingRatio(dampingRatio)
                        .setStiffness(stiffness))

            }
        }
    }
    @SuppressLint("ClickableViewAccessibility")
    override fun onTouchEvent(e: MotionEvent?): Boolean
    {

        touched = when (e?.actionMasked)
        {
            MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> false
            else -> true
        }
        return super.onTouchEvent(e)
    }

    // call this at the end of init{...}
    // example: configureEdgeEffect(this)
    private fun configureEdgeEffect(rc : RecyclerView)
    {

        //create edge effect
        this.edgeEffectFactory = object : EdgeEffectFactory()
        {
            override fun createEdgeEffect(recyclerView: RecyclerView, direction: Int): EdgeEffect
            {
                return object : EdgeEffect(recyclerView.context)
                {
                    override fun onPull(deltaDistance: Float)
                    {
                        super.onPull(deltaDistance)
                        onPullAnimation(deltaDistance)
                    }

                    override fun onPull(deltaDistance: Float, displacement: Float)
                    {
                        super.onPull(deltaDistance, displacement)
                        onPullAnimation(deltaDistance)
                    }

                    private fun onPullAnimation(deltaDistance: Float)
                    {

                        if (orientation == VERTICAL)
                        {
                            val delta: Float =
                                if (direction == DIRECTION_BOTTOM)
                                    -1 * recyclerView.width * deltaDistance * overscrollAnimationSize
                                else
                                    1 * recyclerView.width * deltaDistance * overscrollAnimationSize

                            rc.translationY += delta
                            spring.cancel()
                        }
                        else
                        {
                            val delta: Float =
                                if (direction == DIRECTION_RIGHT)
                                    -1 * recyclerView.width * deltaDistance * overscrollAnimationSize
                                else
                                    1 * recyclerView.width * deltaDistance * overscrollAnimationSize

                            rc.translationX += delta
                            spring.cancel()
                        }
                    }

                    override fun onRelease()
                    {
                        super.onRelease()

                        if (touched)
                            return

                        spring.start()

                    }

                    override fun onAbsorb(velocity: Int)
                    {
                        super.onAbsorb(velocity)

                        if (orientation == VERTICAL)
                        {
                            val v: Float = if (direction == DIRECTION_BOTTOM)
                                -1 * velocity * flingAnimationSize
                            else
                                1 * velocity * flingAnimationSize


                            spring.setStartVelocity(v).start()
                        }
                        else
                        {
                            val v: Float = if (direction == DIRECTION_RIGHT)
                                -1 * velocity * flingAnimationSize
                            else
                                1 * velocity * flingAnimationSize


                            spring.setStartVelocity(v).start()
                        }

                    }

                    override fun draw(canvas: Canvas?): Boolean
                    {
                        setSize(0, 0)
                        return super.draw(canvas)
                    }
                }
            }
        }

copy and paste this code anywhere in your recyclerview class, and call configureEdgeEffect() under init{...}