title: How to set font size and text color in WebView?
body: <p>I'm developing an Android application in which I have used an HTML file for help contents. I have used a WebView to display the content and every thing is fine.
  The problem is that user can change the theme and font size of the application. How can I propagate these properties to the content of WebView? Exactly how can I change the font size and text color in WebView? Is there a simple way to do that or I should create different HTMLfiles or CSSes? How to handle the size units (dp, sp, ...)?</p>
  
  <p>I will appreciate your help with this situation.</p>