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Hands-On Android UI Development

You're reading from  Hands-On Android UI Development

Product type Book
Published in Nov 2017
Publisher Packt
ISBN-13 9781788475051
Pages 348 pages
Edition 1st Edition
Languages
Author (1):
Jason Morris Jason Morris
Profile icon Jason Morris

Table of Contents (21) Chapters

Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
Creating Android Layouts Designing Form Screens Taking Actions Composing User Interfaces Binding Data to Widgets Storing and Retrieving Data Creating Overview Screens Designing Material Layouts Navigating Effectively Making Overviews Even Better Polishing Your Design Customizing Widgets and Layouts Activity Lifecycle
Test Your Knowledge Answers

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...
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