Book Image

Xamarin Blueprints

By : Michael Williams
Book Image

Xamarin Blueprints

By: Michael Williams

Overview of this book

Do you want to create powerful, efficient, and independent apps from scratch that will leverage the Xamarin framework and code with C#? Well, look no further; you’ve come to the right place! This is a learn-as-you-build practical guide to building eight full-fledged applications using Xamarin.Forms, Xamarin Android, and Xamarin iOS. Each chapter includes a project, takes you through the process of building applications (such as a gallery Application, a text-to-speech service app, a GPS locator app, and a stock market app), and will show you how to deploy the application’s source code to a Google Cloud Source Repository. Other practical projects include a chat and a media-editing app, as well as other examples fit to adorn any developer’s utility belt. In the course of building applications, this book will teach you how to design and prototype professional-grade applications implementing performance and security considerations.
Table of Contents (14 chapters)
Xamarin Blueprints
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Building a CarouselView using custom layouts


Xamarin.Forms is a very young layout system, meaning that the number of layouts is quite limited. There are times when we will need to implement our own custom layouts to give us control over exactly where and how our views and controls appear on screen. The requirement will come from situations where you need to improve performance on screens that display a lot of views and controls, and sometimes the standard layouts are not good enough. We want to implement our custom layouts to carry out the absolute minimum amount of work required to produce the required layout.

Note

All layouts derive from the Xamarin.Forms.Layout class, which provides the required mechanisms for adding and removing children internally as well as some key utilities for writing a layout.

Let's start by adding a new folder called Controls in the FireStorable project. Add a new file called CarouselLayout.cs and implement the first part as follows:

public class CarouselLayout :...