If you've got an Android app or game, Android TV can bring it to your users in their living room. Android TV apps use the same architecture as those for phones and tablets. This approach means you can build new TV apps based on what you already know about building apps for Android, or extend your existing apps to also run on TV devices.
The pages below teach you how to build apps for TV devices. To get started, read Getting Started with TV Apps.
If you prefer to learn through interactive video training, check out the Android TV and Google Cast Development course on Udacity (trailer embedded here).
Note: For details on how to publish your TV apps in Google Play, see Distribute to Android TV.