How to remove lags when moving an imageView?

Question

Java

I am writing an Android app in Kotlin.
The essence of the application: imageview moves from top to bottom and ricochets from bottom to top (x coordinate is static). This imageview is like an endless jumper. **BUT:**
When you click on the imageview (which itself moves from the top wall to the bottom and vice versa), the movement speed should increase (the higher the movement speed, the harder it is to hit. This is the point of the game).
I implemented through such "physics":

// btnBall - imageview, по нажатию которой увеличивается скорость передвижения
        val btnBall = findViewById<ImageButton>(R.id.btnBall)
        var speed_of_ball = 500F

        btnBall.setOnClickListener(object : View.OnClickListener {
            override fun onClick(view: View?) {
                speed_of_ball += 10
            }
        })


        // кнопка старт игры
        ButtonStartGame.setOnClickListener {

            val display = windowManager.defaultDisplay
            val size = Point()
            display.getSize(size)
            val height: Int = size.y
            
            var dt = 0.01
            var yVel = speed_of_ball
            var y = 1.0
            var yPos = 0F
            var flag_go_up = false
            btnBall.y = yPos
            GlobalScope.launch(context = Dispatchers.Main) {
                while (true) { // бесконечный цикл передвижения в корутине
                    if (!flag_go_up) {
                        yPos += (dt * yVel).toFloat()
                        yVel += (dt * y).toFloat()
                        y += 0.01
                        btnBall.y = yPos
                        delay(5)
                        // проверка, что imageview не вышла за нижние границы экрана
                        if (yPos >= (height - btnBall.height)) {
                            flag_go_up = true
                            y = 1.0
                            yVel = speed_of_ball
                        }
                    } else { // иначе imageview перемещается снизу вверх
                        yPos -= (dt * yVel).toFloat()
                        yVel += (dt * y).toFloat()
                        y += 0.01
                        btnBall.y = yPos
                        delay(5)
                        if (yPos <= 0) {
                            flag_go_up = false
                            y = 1.0
                            yVel = speed_of_ball
                        }
                    }
                }
            }
        }

The code is working, imageview infinitely moves from the top wall to the bottom wall and vice versa.
But this imageview sometimes lags, i.e. it does not move at a stable speed (sometimes fast, sometimes slowly).
Somewhere I read that there are not enough resources, so android sometimes slows down the speed of moving the imageview.
How to get rid of lags, while retaining the intended functionality - increasing the speed of movement when clicking on this imageview?

Answer 1

You don't have to do that. No endless loops.
Have a look at the animators api , and don't animate by changing coordinates. There is translationX/translationY for this.