Book Image

Android High Performance Programming

By : Emil Atanasov, Enrique López Mañas, Diego Grancini
Book Image

Android High Performance Programming

By: Emil Atanasov, Enrique López Mañas, Diego Grancini

Overview of this book

Performant applications are one of the key drivers of success in the mobile world. Users may abandon an app if it runs slowly. Learning how to build applications that balance speed and performance with functionality and UX can be a challenge; however, it's now more important than ever to get that balance right. Android High Performance will start you thinking about how to wring the most from any hardware your app is installed on, so you can increase your reach and engagement. The book begins by providing an introduction to state–of-the-art Android techniques and the importance of performance in an Android application. Then, we will explain the Android SDK tools regularly used to debug and profile Android applications. We will also learn about some advanced topics such as building layouts, multithreading, networking, and security. Battery life is one of the biggest bottlenecks in applications; and this book will show typical examples of code that exhausts battery life, how to prevent this, and how to measure battery consumption from an application in every kind of situation to ensure your apps don’t drain more than they should. This book explains techniques for building optimized and efficient systems that do not drain the battery, cause memory leaks, or slow down with time.
Table of Contents (17 chapters)
Android High Performance Programming
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Serialization


The same considerations related to lowering image sizes to speed up transfers can be used for text files as well. So, let's have a quick overview of a typical format to transfer data over our client/server architecture. Until a couple of years ago, the XML format was the most used. Then developers changed it to JSON format. Both are human readable, but JSON is simpler to write because of its syntax. It has no need for tags and attributes. For these reasons, JSON is lighter and more preferred and used than XML.

JSON improvements

Google provide an easy-to-use library to handle JSON serialization and deserialization, called GSON. In principle, it uses reflection to find the getters and setters of a Java bean; then, if everything is in the right place inside the bean, it can be deserialized by providing just the wanted class, to create a new object filled with all the data inside the JSON file.

To improve serialization/deserialization performance and transfer timings, we need to improve...