Cast button not appearing

[AllwinJohnson]

I pulled this project and run into my device, but the cast icon on appbar not appearing even If the device and Chromecast or Android TV are connected to the same network.

So I found I need to register the sender app. So I made a new application ID in this project and added it to the newly registered cast SDK console that I brought, after replacing the app-id in demo app with the new one there is no changes that I see.

I found this Unavailable: When Web Receivers are not available, the Cast button does not appear in cast button
Should I need to add a web receiver?
Can I get a working sample project?
The HayStack TV in this website also not working for me.

[jtromo]

Have you gone through this guide for registering your Receiver App? https://developers.google.com/cast/docs/registration#applications

The receiver app either needs to be published or your devices need to be registered for the Cast button to appear.