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Build rich, maintainable multiplatform native mobile apps with Xamarin.Forms

About This Book

* Build an effective mobile app architecture with the Xamarin.Forms toolkit

* Maximize the testability, flexibility, and overall quality of your Xamarin.Forms mobile app

* This step-by-step tutorial is packed with real-world scenarios and solutions to build professional grade mobile apps with Xamarin.Forms

Who This Book Is For

This book is intended for C# developers who are familiar with the Xamarin platform and the Xamarin.Forms toolkit. If you have already started working with Xamarin.Forms and want to take your app to the next level and make it more maintainable, testable, and flexible, then this book is for you.

What You Will Learn

* Find out how, when, and why you should use architecture patterns and get best practices with Xamarin.Forms

* Implement the Model-View-ViewModel (MVVM) pattern and data-binding in Xamarin.Forms mobile apps

* Extend the Xamarin.Forms navigation API with a custom ViewModel-centric navigation service

* Leverage the inversion of control and dependency injection patterns in Xamarin.Forms mobile apps

* Work with online and offline data in Xamarin.Forms mobile apps

* Test both business logic and user interface code in Xamarin.Forms mobile apps

* Use platform-specific APIs to build rich custom user interfaces in Xamarin.Forms mobile apps

* Explore how to improve mobile app quality with analytics and crash reporting using Xamarin Insights

In Detail

Discover how to extend and build upon the components of the Xamarin.Forms toolkit to develop an effective, robust mobile app architecture. Starting with an app built with the basics of the Xamarin.Forms toolkit, we'll go step by step through several advanced topics to create a solution architecture rich with the benefits of good design patterns and best practices.

We'll start by introducing a core separation between the app's user interface and the app's business logic by applying the MVVM pattern and data binding.

Discover how to extend and build upon the components of the Xamarin.Forms toolkit to develop an effective, robust mobile app architecture. Starting with an app built with the basics of the Xamarin.Forms toolkit, we'll go step by step through several advanced topics to create a solution architecture rich with the benefits of good design patterns and best practices.

We'll start by introducing a core separation between the app's user interface and the app's business logic by applying the MVVM pattern and data binding.

Then we will focus on building out a layer of plugin-like services that handle platform-specific utilities such as navigation, geo-location, and the camera, as well as how to use these services with inversion of control and dependency injection. Next we'll connect the app to a live web-based API and set up offline synchronization. Then, we'll dive into testing the app―both the app logic through unit tests and the user interface using Xamarin's UITest framework. Finally, we'll integrate Xamarin Insights for monitoring usage and bugs to gain a proactive edge on app quality.

Style and approach

This easy-to-follow, code-rich guide will walk you through building a real-world Xamarin.Forms mobile app from start to finish. Each chapter builds upon the app by applying new advanced functionalities, design patterns, and best practices.

Preface

Chapter 1 Getting Started
Introducing the app idea
Creating the initial app
Summary

Chapter 2 MVVM and Data Binding
Understanding the MVVM pattern
Adding MVVM to the app
Summary

Chapter 3 Navigation Service
The Xamarin.Forms navigation API
Navigation and MVVM
Creating a navigation service
Summary

Chapter 4 Platform Specific Services and Dependency Injection
Inversion of control and dependency injection in mobile apps
The Xamarin.Forms DependencyService versus third-party alternatives
Creating and using platform-specific services
Registering dependencies
Summary

Chapter 5 User Interface
Custom Renderers
Value Converters
Summary

Chapter 6 API Data Access
Creating an API with Microsoft Azure App Services
Creating a base HTTP service
Creating an API Data Service
Offline data caching
Summary

Chapter 7 Authentication
Adding identity and authentication to Azure Mobile Apps
Creating an authentication service
Adding a sign in page
Summary

Chapter 8 Testing
Unit testing
Automated UI testing
Summary

Chapter 9 App Analytics
Mobile app analytics and crash reporting
Xamarin Insights
Summary

Index