Android studio 如何将缩放添加到此代码？触控技术非常有效，可以移动图像

是否有使用矩阵或缩放手势的代码？我可以在x，y周围移动图像，但不能放大或缩小。欢迎提供任何建议：）

这是我的课

class SimpleFloatingWindow constructor(private val context: Context) {


    private var windowManager: WindowManager? = null
        get() {
            if (field == null) field = (context.getSystemService(WINDOW_SERVICE) as WindowManager)
            return field
        }

    private var floatView: View =
        LayoutInflater.from(context).inflate(R.layout.layout_floating_window, null)

    private lateinit var layoutParams: WindowManager.LayoutParams

    private var lastX: Int = 0
    private var lastY: Int = 0
    private var firstX: Int = 0
    private var firstY: Int = 0

    private var isShowing = false
    private var touchConsumedByMove = false






    private val onTouchListener = View.OnTouchListener { view, event ->
        val totalDeltaX = lastX - firstX
        val totalDeltaY = lastY - firstY

        when (event.actionMasked) {
            MotionEvent.ACTION_DOWN -> {
                lastX = event.rawX.toInt()
                lastY = event.rawY.toInt()
                firstX = lastX
                firstY = lastY
            }
            MotionEvent.ACTION_UP -> {
                view.performClick()
            }
            MotionEvent.ACTION_MOVE -> {
                val deltaX = event.rawX.toInt() - lastX
                val deltaY = event.rawY.toInt() - lastY
                lastX = event.rawX.toInt()
                lastY = event.rawY.toInt()
                if (abs(totalDeltaX) >= 5 || abs(totalDeltaY) >= 5) {
                    if (event.pointerCount == 1) {
                        layoutParams.x += deltaX
                        layoutParams.y += deltaY
                        touchConsumedByMove = true
                        windowManager?.apply {
                            updateViewLayout(floatView, layoutParams)
                        }
                    } else {
                        touchConsumedByMove = false
                    }
                } else {
                    touchConsumedByMove = false
                }
            }
            else -> {
            }
        }
        touchConsumedByMove
    }

    init {
        with(floatView) {
            closeImageButton.setOnClickListener { dismiss() }

        }

        floatView.setOnTouchListener(onTouchListener)

        layoutParams = WindowManager.LayoutParams().apply {
            format = PixelFormat.TRANSLUCENT
            flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
            @Suppress("DEPRECATION")
            type = when {
                Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ->
                    WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY
                else -> WindowManager.LayoutParams.TYPE_TOAST
            }

            gravity = Gravity.CENTER
            width = WindowManager.LayoutParams.WRAP_CONTENT
            height = WindowManager.LayoutParams.WRAP_CONTENT
        }
    }

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刚刚阅读了有关移动和缩放浮动窗口的文章，发现这篇文章“调整窗口大小与移动窗口非常相似，您可以使用我们在移动窗口文章中介绍的相同DragableTouchListener。只需更改x和y的宽度和高度。”只需更改x和y的宽度和高度就可以了吗？