Most of what has been covered in this book is a mix of theory (how to go about designing a screen) and hard practical knowledge (writing the code to produce that screen). When you combine a good theoretical base with practical knowledge of the platform you're working on, you have a powerful combination. Being about to write great applications isn't just about being able to write code (very little in programming is about being able to just write code). It's about having an eye for detail in the user interface, and always thinking about your users.
Android is an amazingly powerful platform when used correctly. In this book, you've learned to use APIs such as data binding, the Room data storage system, and LiveData. This mix of APIs on the Android Platform doesn't just allow you to rapidly develop excellent applications, but it also provides an excellent separation between different areas of your code base. They also don't, in any way, reduce the power you can leverage from...