title: how to add scroll button on list view?
body: <p>i have seen one think in android list view there is one small button on right side to scrolling list. like astro provide a right side button to scrolling a list and it visible while scrolling the list and invisible when it ideal.</p>
  
  <p>I dont have idea to how to done this. but i m thinking there is only one property to enable this.</p>
  
  <p>Please provide ans if anybody use that.</p>
  
  <p>Thanks In Advance!</p>