In this chapter, we explored the various ways by which we are able to send notifications between the handheld device and the Android wearable. We looked at how to build a simple Android handheld app with customized notifications for Android Wear to show different types of notifications. Next, we looked at how to send basic and custom notification messages, which can be customized by the user. Also, we looked at how we can use notifications that can be responded to by the user using their voice.

In the final part of this chapter, we looked at how we can receive multiple notifications on our Android wearable, and group these by using a process called page stacking.

In the next chapter, we will gain an understanding of how we can build effective UIs to create, customize, and draw watch faces using Google's official API that will provide us the ability to present information within the watch area.