Book Image

Xamarin.Forms Projects - Second Edition

By : Daniel Hindrikes, Johan Karlsson
Book Image

Xamarin.Forms Projects - Second Edition

By: Daniel Hindrikes, Johan Karlsson

Overview of this book

Xamarin.Forms is a lightweight cross-platform development toolkit for building apps with a rich user interface. Improved and updated to cover the latest features of Xamarin.Forms, this second edition covers CollectionView and Shell, along with interesting concepts such as augmented reality (AR) and machine learning. Starting with an introduction to Xamarin and how it works, this book shares tips for choosing the type of development environment you should strive for when planning cross-platform mobile apps. You’ll build your first Xamarin.Forms app and learn how to use Shell to implement the app architecture. The book gradually increases the level of complexity of the projects, guiding you through creating apps ranging from a location tracker and weather map to an AR game and face recognition. As you advance, the book will take you through modern mobile development frameworks such as SQLite, .NET Core Mono, ARKit, and ARCore. You’ll be able to customize your apps for both Android and iOS platforms to achieve native-like performance and speed. The book is filled with engaging examples, so you can grasp essential concepts by writing code instead of reading through endless theory. By the end of this book, you’ll be ready to develop your own native apps with Xamarin.Forms and its associated technologies, such as .NET Core, Visual Studio 2019, and C#.
Table of Contents (13 chapters)

Building the MeTracker app

It's time to start building the app. Use the Mobile App (Xamarin.Forms) template. The easiest way to find this template is to search for xamarin.forms in the search bar at the top of the dialog that appears when you start Visual Studio:

We will name the project MeTracker:

We will use the Blank template and build for the Android and iOS platforms:

Make sure that you are compiling using Android version Oreo (API level 26) or higher. We can set this in the project's Properties, under the Application tab.

Update the NuGet packages that were added by the template to make sure that we're using the latest versions.

Creating a repository to save the locations of our users

The first thing we will do is create a repository that we can use to save the locations of our users.

Creating a model for the location data

Before we create the repository, we will create a model class that will represent a user location. Follow these steps to do so:

  1. Create a new...