I can say "Open Spotify" and it will open the app. Then I have a button on the helmet that sends the Play command. But I can't do anything robust like playing a specific artist.
Perhaps if I used Google Music the integration would be built out.
On my Nexus 6p saying "OK Google play 'artist'" will open Spotify and start playing the top songs of that artist. This does not work to play specific playlists though.
Perhaps if I used Google Music the integration would be built out.