How to Chromecast Spotify? How can I Chromecasting Spotify from an Android device? 


App Image or only sound.
With or without Internet connection.
Utilizing Downloaded tracks, when available.
With my device as mobile Hotspot?  I tried Screencast, but it wants a Wi-Fi connection.  (Youtube works OK).
What about a Kindle?  (Now I have a Samsung phone running as hotspot, and a Kindle Tablet - if I could use the Kindle, I would also circumvent the hotspot issue).


Can it perhaps be difficult to find support for Kindle and Spotify, because the Chromecast intended for selling stuff for Google?
If your device is rooted, you can use BubbleUPnP (in the Play Store) as an Xposed module. Then you can cast the phones audio to your chromecast or TV via DLNA.