Although it was initially born as a community effort to port the .NET libraries and common language runtime compilers to various operating systems, the Xamarin product suite soon became the common ground to develop applications for Android and iOS operating systems using the .NET framework and the most popular CLR language, C#. The emergence of the Xamarin development platform created a new development niche, serving products to a variety of platforms at the same time while letting users adapt their existing .NET development skills to these new platforms and produce applications for a wider range of devices and operating systems. Thanks to Xamarin, developers are now enjoying a new era where development efforts don't target only a single application platform, but span multiple devices including smart phones, tablets, personal computers, and even wearable devices, creating highly efficient native applications.
Chapter 1, Developing with Xamarin, provides an insightful look at the Xamarin framework and architecture on target platforms. It also includes introductory information and tips on preparing the development environment for Xamarin.
Chapter 2, Memory Management, investigates how memory is managed on iOS and Android with Xamarin runtime. While drawing parallels with .NET platform, it provides examples of pitfalls, patterns, and best practices.
Chapter 3, Asynchronous Programming, dives deep into asynchronous and multi-threaded programming concepts. Platform-specific problems in various threading scenarios on different platforms are discussed.
Chapter 4, Local Data Management, provides useful patterns and techniques to efficiently use, manage, and roam data on mobile devices using Xamarin.
Chapter 5, Networking, contains a detailed look at the networking capabilities of Xamarin applications and various service integration scenarios. Networking implementations are illustrated with real-world examples, including the use of local storage for data caching.
Chapter 6, Platform Extras, concentrates on platform-specific APIs and features. It explains some of the peripherals that can be employed in Xamarin applications. A look at native libraries and how to include them in cross-platform Xamarin applications is also included in this chapter.
Chapter 7, View Elements, provides introductory information about UX (User Experience) and design concepts, and an explanation of the differences and similarities between design principles on Xamarin platforms.
Chapter 8, Xamarin.Forms, focuses on the various features and extensibility options of Xamarin. It also covers the forms extension module and how to use it to generate consistent user interfaces on multiple platforms.
Chapter 9, Reusable UI Patterns, discusses the strategies and patterns for reusing visual assets in cross-platform projects. Some advanced software architectural topics about MVC and MVVM patterns are also analyzed and demonstrated.
Chapter 10, ALM – Developers and QA, provides an introduction to Application Lifecycle Management and continuous integration methodologies for Xamarin cross-platform applications. As the part of the ALM process that is the most relevant to developers, unit testing strategies are discussed and demonstrated, as well as automated UI testing.
Chapter 11, ALM – Project and Release Management, explains the essentials of version control and automated continuous integration workflows. Source control options, as well as automated build strategies for Xamarin projects, are demonstrated.
Chapter 12, ALM – App Stores and Publishing, explains the processes related to app package preparation and release, which constitutes the last step of the application lifecycle.
In order to build the sample project and make use of the code samples in this book, you will need a Xamarin.iOS and/or Xamarin.Android subscription, depending on the platform you want to target. Most of the diagnostic tools used are distributed as part of the development SDKs for the target platforms. As a development IDE, you will need Visual Studio 2013 (or higher) or Xamarin Studio if you are using or configuring a Windows based development environment, but only Xamarin Studio otherwise. For testing and diagnostics, real mobile devices or SDK-provided emulators can be used.
This book is ideal for those who want to take their novice or intermediate-level Xamarin mobile development skills to the next level to become the go-to person within their organization. To fully understand the patterns and concepts described, you should possess a reasonable level of knowledge and an understanding of the core elements of cross-platform application development with Xamarin.
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.
Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "For instance, Objective-C types such as NSObject, NSString, NSArray are exposed in C# and provide binding to underlying types."
A block of code is set as follows:
namespace Master.Xamarin.Portable
{
public class MyPhotoViewer
{
private readonly IStorageManager m_StorageManager;Any command-line input or output is written as follows:
bcdedit /copy {current} /d "No Hyper-V" bcdedit /set {<identifier from previous command>} hypervisorlaunchtype off
New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "It can still be accessed using the Run with Mono HeapShot menu item under the Project menu in Xamarin Studio."
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