Book Image

BlackBerry Java Application Development

Book Image

BlackBerry Java Application Development

Overview of this book

BlackBerry Smartphone was once the domain of jet-setting business users with power suits. Now you can hardly go anywhere without seeing someone using a BlackBerry to check their messages or make a call. It's this kind of explosive growth that makes the BlackBerry ecosystem a great place to develop and market applications through the BlackBerry App World store—this book shows you how to do just that! This step-by-step guide gives you a hands-on experience of developing innovative Java applications for your BlackBerry. With the help of this book, you will learn to build your own applications to illustrate the platform, and the various capabilities that developers can use in their programs. It explores the powers of Blackberry and helps you develop professional and impressive Java applications. The book teaches how to write rich, interactive, and smart BlackBerry applications in Java. It expects the readers to know Java but not Java Mobile or the BlackBerry APIs. We will learn to build rich, interactive, and smart Java applications for the BlackBerry. The book will cover UI programming, data storage, programming network, and internet API apps. As we move on, we will learn more about the BlackBerry's device features, such as messaging, GPS, multimedia, contacts and calendar, and so on.This book also helps you build your own applications to illustrate the platform, and the various capabilities that developers can use in their programs.
Table of Contents (18 chapters)
BlackBerry Java Application Development
Credits
About the Author
Acknowledgement
About the Reviewers
Preface

Threading


Another thing that makes working with networking difficult is that you must also use threading. Networking just can't be done without threading, but this also makes the applications more complicated and difficult. Network traffic is the epitome of a "long running task" by even desktop computer standards. Mobile devices and mobile networks are much slower than desktops! Therefore, you should always utilize a thread when doing anything that relates to sending or receiving of data over a network. Unfortunately, this means more complicated code, but there is just no avoiding it.

An in-depth discussion of threading is beyond this book. In general, threading is a way to branch the flow of execution and, in essence, performing two actions at the same time. Every piece of code that is executed is done so in a thread. We've never had to mention it before though because the samples that we've created haven't needed more than one execution path. The only exception to this is in the Chapter...