Book Image

Android 9 Development Cookbook - Third Edition

By : Rick Boyer
Book Image

Android 9 Development Cookbook - Third Edition

By: Rick Boyer

Overview of this book

The Android OS has the largest installation base of any operating system in the world. There has never been a better time to learn Android development to write your own applications, or to make your own contributions to the open source community! With this extensively updated cookbook, you'll find solutions for working with the user interfaces, multitouch gestures, location awareness, web services, and device features such as the phone, camera, and accelerometer. You also get useful steps on packaging your app for the Android Market. Each recipe provides a clear solution and sample code you can use in your project from the outset. Whether you are writing your first app or your hundredth, this is a book that you will come back to time and time again, with its many tips and tricks on the rich features of Android Pie.
Table of Contents (24 chapters)
Title Page
Copyright and Credits
Dedication
About Packt
Contributors
Preface
Index

RecyclerView replaces ListView


As the name implies, ListView is designed for displaying lists of information.  If you have prior experience on Android, you’ve probably come across the ListView and possibly GridView controls before. If not while coding, most likely you’ve used it as an app, as it’s one of the most commonly used controls available. For most applications and users, the old ListView was probably sufficient and didn’t pose any problems. As an example, most users could probably see their list of emails in their inbox without any problems.  But for some, they might have so many emails in their inbox that when scrolling through their list, their device would stutter (slight pauses when scrolling). Unfortunately, ListView has many such performance problems.

The most significant performance issue with ListView is caused by creating new item objects for each item when scrolling. Though much of the performance problem could be eliminated with a properly implemented data adapter, the...