Developing Scalable Series 40 Applications: A Guide for Java by Michael Juntao Yuan

By Michael Juntao Yuan

Nokia's sequence forty Developer Platform supplies Java builders entry to the world's highest-volume, fastest-growing, and most enjoyable cellular markets. Nokia sells on the subject of a hundred million devices inside their Developer Platform households each year, and the sequence forty Developer Platform is the highest-volume platform within the relatives. good fortune in this platform is important for the economic good fortune of any cellular software. wisdom of the sequence forty Developer Platform may be utilized to the Java surroundings on all Nokia Developer Platform units, together with sequence 60 units. totally reviewed by way of Nokia's subject material specialists, this ebook covers the total improvement processfrom layout and coding via trying out and deployment. The authors stroll you thru 11 entire instance functions, providing downloadable patron and server resource code for you to use to jump-start almost any venture. alongside the way in which, the authors light up the technical underpinnings of sequence forty, overview the most important architectural matters, introduce key cellular layout styles, speak about scalability and equipment optimization options, and provide dozens of most sensible practices and tipsmany of that have by no means sooner than been released.

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Introducing WAP A WAP browser works pretty much the same way as the HTML Web browser on a desktop PC. The user interacts with the remote application server by following dynamic links and submitting forms. The handset renders the content provided by the server. All the application logic is processed on the server side. Although mobile and desktop browser applications share the same application model, the actual network architecture and markup languages are different. We check out those differences in the next several sections.

If the user selects no, we will resume the view session of the MIDlet. The confirmation screen class is listed here. Please notice that, again, the ConfirmExitScreen class is a Form that acts as its own CommandListener. resume(); } } } The resume() method in the PhotoViewer class is shown below. setCurrent(imageForm); } Automatically Start MIDlets via the Push Registry So far, we discussed how to change MIDlet life cycle states instantaneously via the AMS or programmatically from inside the MIDlet.

The Mobile Information Device Profile (MIDP) is built on top of the CLDC to provide support for smart phones; the Foundation Profile is built on top of CDC to provide support for networked embedded devices; the Personal Basis Profile (PBP) and Personal Profile (PP) are built on top of the CDC and the Foundation Profile to provide support for GUI-based powerful mobile devices such as high-end PDA devices. The standard UI library in the current PBP and PP editions is the Java AWT (Abstract Widget Toolkit).

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