From the Google documentation about adding a Cast button, https://developers.google.com/cast/docs/android_sender#adding-the-cast-button , it seems like the option they provide is for us to add a static button to the Action Bar. That said, what would I do if I wanted to add a Cast Button to my application only if there's a device on the network dynamically? Also, what are some ways you would create a custom button that mimic the functionality of a MediaRouter Button.
Any input would be appreciated!