title: Dynamically change font size in Android
body: <p>I want to support font resizing with an entry in Preferences (where the user picks among given font size options) or by using a gesture (flinging up/down) as used in popular e-book reader applications such as <a href="http://www.aldiko.com/" rel="nofollow" title="Aldiko e-Book Reader Application for Android">Aldiko</a>. Flinging up and down along right side of the screen triggered brightness change in Aldiko.</p>
  
  <p>How can I implement this type of dynamic property change?
  Are there any implementation differences for this in 1.6 and 2.0+ ?
  Do I have to have different themes pre-configured with different font sizes?</p>