Android studio google maps

Question

I am trying with Google maps in android studio, I want to find alternative paths from source to destination, how do I implement this part? It is showing a single route between source and destination currently

Answer 1

Direction API

Direction Request without Alternate Route

https://maps.googleapis.com/maps/api/directions/json?origin=Nevada,%20USA&destination=Los+Angeles,CA&key=API_KEY

Fastest route will be given.

Result:

1. Route 1
   • Distance: 489 mi
   • Duration: 9 hours 29 mins

Direction Request with Alternate Route

https://maps.googleapis.com/maps/api/directions/json?origin=Nevada,%20USA&destination=Los+Angeles,CA&alternatives=true&key=API_KEY

Each route will be under "legs".

Each element in the legs array specifies a single leg of the journey from the origin to the destination in the calculated route. For routes that contain no waypoints, the route will consist of a single "leg," but for routes that define one or more waypoints, the route will consist of one or more legs, corresponding to the specific legs of the journey.

Result:

1. Route 1
   • Distance: 489 mi
   • Duration: 9 hours 29 mins
2. Route 2
   • Distance: 475 mi
   • Duration: 9 hours 36 mins
3. Route 3
   • Distance: 511 mi
   • Duration: 9 hours 39 mins

Here is a screenshot of the google maps with the same request.

Note: The duration may not be the same for the web Google Maps and Direction API. There will still be about few minutes of difference. API key must be a SERVER KEY.

Here is a tutorial for implementation.

Hope this helps!