我有一个图像按钮，当按下时，我希望它指向用户的手指（等。就像一个字符如何在视频游戏中看用户的鼠标）。然而，它不工作，它不正确跟踪手指。我认为这与我的逻辑有关，但我不确定。
下面是我的代码：

findViewById<ImageButton>(R.id.leftButton).setOnTouchListener { _, motionEvent ->
    //Will happen when image is pressed other wise event is set to false
    when (motionEvent.action){
        //change opacity of nob direction image when user holds finger on image
        MotionEvent.ACTION_DOWN, MotionEvent.ACTION_MOVE -> {

           //remove directional image (not the image moving)
           findViewById<ImageView>(R.id.leftButtonDerection).alpha = 0.0f

           //get y and x value of finger
           val x: Float = motionEvent.x
           val y: Float = motionEvent.y

           //find x and y value for nob image (this is where I think the problem is)
           val nobCenterX = (findViewById<ImageButton>(R.id.leftButton).x + findViewById<ImageButton>(R.id.leftButton).width) / 2
           val nobCenterY = (findViewById<ImageButton>(R.id.leftButton).y + findViewById<ImageButton>(R.id.leftButton).height) / 2

           //calculate angle from finger to nob point
           val angle = Math.toDegrees(atan2(y - nobCenterY, x - nobCenterX).toDouble())

           //apply angle to nob image rotation
           findViewById<ImageButton>(R.id.leftButton).rotation = angle.toFloat()
       }
       //when user lets go or the hold action is stopped
       //it will reset the opacity of the direction image
       MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
           findViewById<ImageView>(R.id.leftButtonDerection).alpha = 1.0f
           findViewById<ImageButton>(R.id.leftButton).rotation = 0f
       }
   }
   false
}

字符串
输出代码：

我想要的是图像能够做一个完整的360，所以它可以按照手指在任何位置一旦按下。
谢谢你的帮助