I have an Android sender for Google Cast, and a Chromecast. I can cast video to a TV, and the cast button on actionbar becomes white.
Now comes the question. When I leave the sender app, Chromecast continues to play video. This is what I want. But when I re-open the sender app, I don't know how to detect if the devices is already running my receiver, so I need to automatically join current session.
Can anyone help? Thank you!