title: How to add a polyline in google maps v2 that follows the road for a route
body: <p>I would like to create a polyline from point A to point B that highlights a certain route in google maps.  I've checked here <a href="https://developers.google.com/maps/documentation/android/shapes" rel="nofollow">https://developers.google.com/maps/documentation/android/shapes</a> 
  . When I create a polyline it draws a straight line from point a to point b.  Is there anyway to make this polyline follow the path of the street instead?</p>