title: make text at the centre of the circle
body: <p>I wanted to draw a Text inside a Circle provided that text should be matched properly at the center of the circle. Actually I am not getting a general method/way to make text at the center.
  Also it should not depend in whether the Text is in uppercase or lower case.</p>
  
  <p>My attempt :-</p>
  
  <pre><code>textPaint.TextAlign = Paint.Align.Center; // basic need.
  </code></pre>
  
  <p>After that I tried to get Ascent and Descent of the Font and get their half and moved the text below by this value. But it is not centered :(</p>
  
  <pre><code>  var fontAscent = -textPaint.Ascent(); // default value is negative for ascent
    var fontDescent = textPaint.Descent();
  </code></pre>
  
  <p>note :- I am getting the circle at the center so its center point is correct.</p>
  
  <p>Any Idea how can i do it.</p>