How to Detect if touch is inside the oval or not in android canvas?

I want to detect if touch in the canvas view is inside the oval or not.

Current code:

override fun draw(canvas: Canvas, paint: Paint) {
    val rectF = RectF(200F, 300F, 100F, 100F)
    canvas.drawOval(rectF, paint)
}

override fun onTouchEvent(event: MotionEvent): Boolean {
    val value = super.onTouchEvent(event)
    when (event.action) {
        MotionEvent.ACTION_DOWN ->{
        return true
        } 
        MotionEvent.ACTION_MOVE -> {
       // detect touch inside oval in canvas
      return true
      }
        MotionEvent.ACTION_UP -> {
      return true
      }
    }
    return value
}