Redraw route on map when user changes driving route
<p>I'm working on an Android App which draws path on map using Polyline options, between source to destination.</p>

<p>This works fine.</p>

<p>What I need is, if user starts from source, and instead of taking drawn route towards destination, the user takes another route, the path on map should be redrawn for user's current path.</p>

<p>I'm using Directions API for drawing path.</p>

<p>I think, I'm required to use Google Navigation API. How can use that within my app, without having to navigate to Google Maps app?</p>