title: Directions using google maps in android studio
body: <p>How to get intermediate points between source and destination using geocoding. I have to draw the route map between the source and destination along with way points. 
  I read posts about using Google Maps Directions API to retrieve the way-points. Can someone please help me with the coding ! 
  Also, could you please suggest a back-end database for google maps?
  I am using Android Studio. API level 21.</p>