Android: Draw Route From Current Location To Destination Location On Google Map

In order to show route on Google Map, Just call an intent which passes current and destination latitude and longitude. You may also pass address in any case if don't know lat-long. After doing this, its Google Map's job to show location. You may also show street view.

In below code, there are three parameters : current_lat, current_longi, dest_address

 final Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse("http://maps.google.com/maps?" 
+ "saddr="+ current_lat+","+current_longi + "&daddr="+dest_address ));

intent.setClassName("com.google.android.apps.maps","com.google.android.maps.MapsActivity");
startActivity(intent);

If you have current address and destination address, then you can write like this :

Uri.parse("http://maps.google.com/maps?" 
+ "saddr="+curr_address+ "&daddr="+dest_address ));

If you have current and destination latitude and longitude both then you can write like this :

Uri.parse("http://maps.google.com/maps?" 
+ "saddr="+ current_lat+","+current_longi + "&daddr="+ destt_lat+","+dest_longi  ));


When you call this intent, Google Map shows option whether to draw route by bus or by walk.