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Work with sprites in J2ME

John Muchow, Author
John Muchow, a freelance technical writer and consultant, is the author of Core J2ME Technology and MIDP. Visit Core J2ME for additional source code, articles, and developer resources. Send John e-mail for additional information about writing or consulting projects.

Summary:  With the release of the Mobile Information Device Profile (MIDP) version 2.0, J2ME developers can now access a new sprite class. A sprite is a representation of an image in memory. However, a sprite offers inherent capabilities that provide vastly more robust image manipulation beyond that available in a standard image. This tutorial presents the basic principles for working with both animated and nonanimated sprites. Moreover, you'll have the opportunity to create two complete MIDlets (J2ME applications) that demonstrate the inner workings of the sprite class.

Date:  16 Dec 2003
Level:  Introductory
PDF:  A4 and Letter (509 KB | 36 pages)Get Adobe® Reader®

Activity:  17821 views
Comments:  

Summary

Summary

In this tutorial, you learned how to create both nonanimated and animated sprites. You also saw the inherent benefits of working with sprites including:

  • Translation (rotate and mirror)
  • Setting a reference pixel for more accurate placement
  • Detecting collisions

If you are interested in the development of mobile games, you'll need a solid understanding of sprites to succeed. This tutorial features two example MIDlets that should provide a foundation for experimenting and learning more about how to work with the Sprite class as you begin developing mobile gaming applications. Even if you are not a gamer, sprites can still prove a useful tool for working with images. For example, in a business application the ability to rotate and translate images for a charting or reporting application could prove to be quite useful. No doubt, the Sprite class is a welcome addition to the MIDP programming toolset.

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