Book Image

Delphi Cookbook - Third Edition

By : Daniele Spinetti, Daniele Teti
Book Image

Delphi Cookbook - Third Edition

By: Daniele Spinetti, Daniele Teti

Overview of this book

Delphi is a cross-platform integrated development environment (IDE) that supports rapid application development on different platforms, saving you the pain of wandering amid GUI widget details or having to tackle inter-platform incompatibilities. Delphi Cookbook begins with the basics of Delphi and gets you acquainted with JSON format strings, XSLT transformations, Unicode encodings, and various types of streams. You’ll then move on to more advanced topics such as developing higher-order functions and using enumerators and run-time type information (RTTI). As you make your way through the chapters, you’ll understand Delphi RTL functions, use FireMonkey in a VCL application, and cover topics such as multithreading, using aparallel programming library and deploying Delphi on a server. You’ll take a look at the new feature of WebBroker Apache modules, join the mobile revolution with FireMonkey, and learn to build data-driven mobile user interfaces using the FireDAC database access framework. This book will also show you how to integrate your apps with Internet of Things (IoT). By the end of the book, you will have become proficient in Delphi by exploring its different aspects such as building cross-platforms and mobile applications, designing server-side programs, and integrating these programs with IoT.
Table of Contents (12 chapters)

Doing it in the background, the right way – Android services

In this recipe, we'll be introduced to the fantastic world of Android services! As you probably know, Android was multitasking from the very first version. Multitasking is not a simple thing for an operating system running on limited hardware. Let's think about the memory that could be allocated for days, or weeks, to some specific processes with the user that runs new apps over and over again. At some point, the memory will run out and the OS will have to decide whether to prevent a new app from starting or to eliminate some old processes that the user hasn't used for a while. Obviously, the second option is the best. To allow new apps to run, the OS needs to free some memory still allocated to other apps. At this point, there is another question: Which apps can be removed from the memory?

Let...