Pro Java ME Apps: Building Commercial Quality Smartphone by Iliescu Ovidiu
By Iliescu Ovidiu
Seasoned Java ME Apps grants, the developer, the knowledge required for writing refined Java ME functions and for profiting from this massive strength industry. Java ME is the most important cellular software program platform on the earth, supported by means of over eighty% of all telephones. you are going to hide what Java ME is and the way it compares to different cellular software program structures, how one can adequately layout and constitution Java ME purposes, the way to imagine like an skilled Java ME developer, what universal difficulties and pitfalls you'll run into, find out how to optimize your code, and lots of different key topics. in contrast to different Java ME books available in the market, which basically educate the reader the fundamentals of Java ME in terms of a number of basic examples, this ebook provides a broader, eagle-eye photo of a whole Java ME program and what writing one consists of. From there, the book presents, explains, and lets you enforce all of the crucial points of Java ME improvement, from the person interface to client-server communique. As this unfolds, the selections and reasoning in the back of the code also are provided. The e-book assumes that the reader is already acquainted with Java ME and Java purposes generally. in response to and geared in the direction of real-life Java ME eventualities courses the reader during the complete technique of constructing a solid Java ME program Explains the choices made at every one step, offers recommendation and examples of excellent practices vs. undesirable practices What you’ll research What makes cellular software program diversified from computer software program tips on how to layout and enforce your Java ME program What the most typical difficulties affecting Java ME improvement (such as machine fragmentation) and the way to unravel them What are the correct Java ME programming suggestions and the way to imagine like an skilled Java ME developer how one can optimize your code tips on how to improve store-quality apps Who this publication is for Intermediate to complex Java ME builders seeking to examine right Java ME improvement. cellular builders trying to find an outstanding resource of knowledge relating to right cellular program improvement desk of Contents Getting began A Java ME Framework Defining Our facts The Networking Module The patience Module The UI Module The Localization Module placing all of it jointly equipment Fragmentation Optimizing Your Code including high-quality Touches and person interplay advancements Java ME software trying out complicated Java ME pictures the correct Java ME mind-set Java ME and the long run ultimate phrases
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Fortunately, there are a few golden rules that Java ME developers should always strive to obey. In the following pages we’ll go over the most important ones, such as coding defensively, shunning complexity, and avoiding making wrong assumptions about the platform and the environment. 15 16 CHAPTER 1: Getting Started NOTE: Runtime flexibility is of lesser concern on other modern-day platforms, such as Android and iOS. Applications for these platforms not only have more resources at their disposal, they are also native, and thus have far better control over their environment and their resources than Java ME ones, which run totally constrained in their virtual machines.
The EventControllerManager The primary purpose of the EventControllerManager is to make sure that event processing for all the controllers under its supervision is done on the same thread— which is typically not the same one they were issued from. Its secondary purpose is to ensure that all controllers get roughly the same amount of CPU time. The manager will have a makeshift queue for EventControllers. You can add controllers to the queue by calling assign(), and you can remove them from the queue by calling unassign().
Portability also means that, regardless of the underlying hardware, your code runs great even in less-than-ideal circumstances—for example, when the battery is running low or when the device’s CPU is decoding music in the background. Furthermore, as circumstances can change during runtime, sometimes several times in the course of a single run, your application has to be able to deal with these changes at a moment’s notice. This level of flexibility is not easy to achieve, as it involves a heavy dose of experience, skill, and sometimes luck.