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

Testing for availability of transports


A big part of the decision for which transport to use comes down to being able to test to see which transports are available. You can't test for every possibility, but you can certainly test for certain aspects, such as whether the device supports Wi-Fi or whether the application is currently running on the simulator or not.

One common technique that seems to work well is to only prompt the user for an address and to remove any other connection string options the user might have added. Then, after some testing to determine which transports are available, add the appropriate connection string options and create the connection. This takes the responsibility of knowing anything about the network transports off the user and makes the whole experience much smoother for the user.

There are several classes that can be used to gather bits of information about what capabilities are present on the device. Some of these classes have changed over time, so there may...