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

Time for action - ‑ HTTP Basics


  1. 1. Let's get started with a new project named HTTPBasics. Create a BlackBerry project in Eclipse and create a standard UiApplication derived class and a MainScreen derived class.

  2. 2. At this point you need only one field added to the screen—a RichTextField called _Output. Add a constructor for the screen and then add that field to the screen in the constructor.

  3. 3. You need one more class in this application, a thread to handle the processing of the request. One more time, create a new class derived from Thread called ServiceRequestThread.

  4. 4. Now that the skeleton is in place, start adding some code. The first step will be to set up the thread with the data that you will need in order to make the request. Add these data members and the following constructor to the ServiceRequestThread class.

    protected String _URL;
    protected HTTPBasicsMainScreen _Dest = null;
    public ServiceRequestThread(String URL, HTTPBasicsMainScreen screen)
    {
    super();
    _Dest = screen;
    _URL ...