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 - using a resource in your code


  1. 1. First, it is good practice to rebuild your project before starting to work with a new resource file. Do this by selecting Project | Build All.

  2. 2. You need to add the new keys and values that you will be using to the resource files. Add a new key named SCREEN_NO_GPS_SUPPORT to the resources files and set the value to "No GPS Support is available".

  3. 3. The next step is to add an interface to the HanselMainScreen class where you will be using resources. Add the interface named HanselResource to the implements list in the class declaration next to the LocationListener so that the code looks like the following code.

    public class HanselMainScreen extends MainScreen implements LocationListener,HanselResource
    
  4. 4. Add a ResourceBundle object to the data members of the HanselMainScreen.

    ResourceBundle _resources;
    
  5. 5. In the constructor for the HanselMainScreen, create an instance of the ResourceBundle to use.

    _resources = ResourceBundle.getBundle(BUNDLE_ID...