Define limits of image - android-studio

Question

I have an imageview and I draw circles when touch on the screen, for selected points. But I didn’t want put the circles outside the imageview limits. The image is a SVG with the contours of the human body. How can I define the limits of image?
Here is my code:
Kotlin:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
var layout: RelativeLayout = findViewById(R.id.layout1)
layout.addView(CustomView(this))
var imageBody: ImageView = findViewById(R.id.body)
var mBitmap: Bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888)
}
class CustomView(context: Context) : View(context) {
val brush = Paint()
var coordX: Float = 0.0f
var coordY: Float = 0.0f
override fun onTouchEvent(event: MotionEvent?): Boolean {
var X = event!!.getX()
var Y = event.getY()
coordX = X
coordY = Y
invalidate()
var text :String = "X: " + coordX + "\nY: " + coordY
Toast.makeText(context, text, Toast.LENGTH_LONG).show()
return super.onTouchEvent(event)
}
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
/*Circle Color*/
brush.setARGB(255, 105, 103, 103)
/*Circle*/
canvas.drawCircle(coordX, coordY, 10f, brush)
}
}

Answer 1

Well, that's simple Math. In your onTouchEvent() implementation query getMeasuredWidth() and getMeasuredHeight() and clamp the coordinates of your touch event according to the circle you want to draw.
Since your circle has a radius of 10f, coordX is Math.max(10f, Math.min(X, getMeasuredWidth() - 10f)) and coordY likewise Math.max(10f, Math.min(X, getMeasuredHeight() - 10f)).