Book Image

Hands-On Android UI Development

By : Jason Morris
Book Image

Hands-On Android UI Development

By: Jason Morris

Overview of this book

A great user interface (UI) can spell the difference between success and failure for any new application. This book will show you not just how to code great UIs, but how to design them as well. It will take novice Android developers on a journey, showing them how to leverage the Android platform to produce stunning Android applications. Begin with the basics of creating Android applications and then move on to topics such as screen and layout design. Next, learn about techniques that will help improve performance for your application. Also, explore how to create reactive applications that are fast, animated, and guide the user toward their goals with minimal distraction. Understand Android architecture components and learn how to build your application to automatically respond to changes made by the user. Great platforms are not always enough, so this book also focuses on creating custom components, layout managers, and 2D graphics. Also, explore many tips and best practices to ease your UI development process. By the end, you'll be able to design and build not only amazing UIs, but also systems that provide the best possible user experience.
Table of Contents (21 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
13
Activity Lifecycle

Creating a ViewHolder with data binding


As you can see from building a traditional ViewHolder implementation, there is quite a lot of work and boilerplate code required just to put the data from a single item onto the screen in a layout. Further, it's actually quite expensive in its own right, because every one of the ViewHolder instances creates and holds an instance of the DateFormatter where they can easily be shared between all the ClaimItemViewHolder instances for a RecyclerView.

In cases like this, data binding can make a huge difference. Using a few tricks, you can actually create a completely generic ViewHolder implementation that will work for any data object in your application (assuming that you can bind it to a layout file). First, you'll need to create a nice generic ItemPresenter, and then modify the layout, and then you're ready to create a generic data-binding ViewHolder implementation. Follow these instructions, and you'll only ever need one ViewHolder implementation:

  1. Right...