Book Image

Windows Phone 8 Application Development Essentials

By : Tomasz Szostak
Book Image

Windows Phone 8 Application Development Essentials

By: Tomasz Szostak

Overview of this book

<p>Windows Phone 8 replaces Windows Phone 7 devices with the Windows NT kernel found on many Windows 8 components. Windows 8 will give you more options to develop better and more visually appealing PC and Tablet applications.</p> <p>A practical guide that will show you how you how to create testable MVVM applications keeping in mind the best UI practices. You will learn how to integrate peripheral sensors and social portals like Facebook and Twitter into your applications. This book shows the advantages of using modern patterns instead of the traditional way of programming.</p> <p>Starting with a Windows Phone UI description, the guide then takes you through the world of fast and fluid design guidelines. After that, you will be shown the beauty of C# and MVVM advantages, finishing with clear descriptions of mobile-application integration with peripherals and social media. Clear and well-described examples throughout will help you become a WP8 developer.</p> <p>You will also learn how to test your applications using Unit Test cut dependencies in your methods using Mocks, and use the newest features of C# such as asynchronous methods. If you are more of a designer than a developer, then there is also an explanation on how to create a consistent look and feel for Windows Phone applications.</p>
Table of Contents (12 chapters)

Background agents

Modern applications are very interactive since they collect data and load content with no user attention. Windows Phone applications that use background agent are able to execute code even if they are not running in the foreground.

An application can implement only one background agent, which could be one of two types:

  • PeriodicTask: This is used to specify tasks that run typically every 30 minutes and could be 25 seconds long. There is a periodic task limitation in the system for a maximum of six periodic agents per device. If our phone reaches this limit, adding a new task to the schedule causes InvalidOperationException to be thrown. It is usually used to get some updates, achieve synchronization, or calculate some data.

  • Resource-intensive agent: Tasks will run only if the power source is plugged into the device and typically run for 10 minutes. There is also a limitation in the internet connection type; that is, it can only use a Wi-Fi or PC connection. It fires when...