This page explains best practices for interacting with the GoogleMap object in
your app.
Implement GoogleMap features on the same maps instance
Maps APIs are also available as part of Navigation SDK, which you can use to build map specific (non-navigation) experiences. If your app includes both a non-navigation map experience and a navigation experience, we recommend using the Maps and Navigation API on the same map instance.
Use getMapAsync to obtain the GoogleMap instance
You can obtain a GoogleMap object using either
SupportNavigationFragment#getMapAsync or NavigationView#getMapAsync. We
recommend this method over holding onto the GoogleMap instance that might
become stale once the NavigationView underneath is recreated.
Also be sure to clean up the GoogleMap retrieved from this method after it is
no longer needed. For more information, see Instance cleanup best
practices.