To get the position number of selected text in the text view
<p>I am trying to highlight the selected text and find the position of selected text in the text view.</p>

<p>for example :</p>

<blockquote>
  <p>It is stackOverFlow .Stackoverflow is very useful.</p>
</blockquote>

<p>Now when user Select <strong>stackoverflow</strong> then the back ground color should change and give an alert that the 3 rd word is selected if user select <strong>very</strong> then there is an alert saying 6th words selected</p>
