Crash when playing with the recycler view and the animations about motionlayoutplayground HOT 3 CLOSED

constructor(
    context: Context?,
    attrs: AttributeSet?,
    defStyleAttr: Int
) : super(context, attrs, defStyleAttr)

override fun obtainVelocityTracker(): MotionTracker {
    return MyTracker.obtain()
}

/**
 * The only functional changes to this class are added null-checks and recursion avoidance in
 *
 * @see MyTracker.getYVelocity
 */
private class MyTracker private constructor() : MotionTracker {
    var tracker: VelocityTracker? = null
    override fun recycle() {
        tracker?.let {
            recycle()
            tracker = null
        }
    }

    override fun clear() {
        tracker?.clear()
    }

    override fun addMovement(event: MotionEvent) {
        tracker?.addMovement(event)
    }

    override fun computeCurrentVelocity(units: Int) {
        tracker?.computeCurrentVelocity(units)
    }

    override fun computeCurrentVelocity(
        units: Int,
        maxVelocity: Float
    ) {
        tracker?.computeCurrentVelocity(units, maxVelocity)
    }

    override fun getXVelocity(): Float {
        return tracker?.xVelocity ?: 0f
    }

    override fun getYVelocity(): Float {
        return tracker?.yVelocity ?: 0f
    }

    override fun getXVelocity(id: Int): Float {
        return tracker?.getXVelocity(id) ?: 0f
    }

    override fun getYVelocity(id: Int): Float {
        return tracker?.getYVelocity(id) ?: 0f
    }

    companion object {
        private val me =
            MyTracker()

        fun obtain(): MyTracker {
            me.tracker =
                VelocityTracker.obtain()
            return me
        }
    }
}