Book Image

Xamarin Mobile Development for Android Cookbook

By : Matthew Leibowitz
Book Image

Xamarin Mobile Development for Android Cookbook

By: Matthew Leibowitz

Overview of this book

Xamarin is used by developers to write native iOS, Android, and Windows apps with native user interfaces and share code across multiple platforms not just on mobile devices, but on Windows, Mac OS X, and Linux. Developing apps with Xamarin.Android allows you to use and re-use your code and your skills on different platforms, making you more productive in any development. Although it’s not a write-once-run-anywhere framework, Xamarin provides native platform integration and optimizations. There is no middleware; Xamarin.Android talks directly to the system, taking your C# and F# code directly to the low levels. This book will provide you with the necessary knowledge and skills to be part of the mobile development era using C#. Covering a wide range of recipes such as creating a simple application and using device features effectively, it will be your companion to the complete application development cycle. Starting with installing the necessary tools, you will be guided on everything you need to develop an application ready to be deployed. You will learn the best practices for interacting with the device hardware, such as GPS, NFC, and Bluetooth. Furthermore, you will be able to manage multimedia resources such as photos and videos captured with the device camera, and so much more! By the end of this book, you will be able to create Android apps as a result of learning and implementing pro-level practices, techniques, and solutions. This book will ascertain a seamless and successful app building experience.
Table of Contents (20 chapters)
Xamarin Mobile Development for Android Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Accessing data with ADO.NET


Many apps need to use databases, irrespective of whether the app is database-centric or even just to store pieces of data in a structured form. Android provides SQLite as a database engine and .NET provides ADO.NET as an interface.

Getting ready...

This recipe demonstrates how we can make use of ADO.NET to interact with a SQLite database using SQL. It is assumed that you have some SQL knowledge to construct queries.

How to do it...

Using ADO.NET with SQLite is easy and not much different from working with any ADO.NET provider. It is fairly straightforward to create and interact with a SQLite database:

  1. To start with, we need to add a reference to System.Data and Mono.Data.SQLite.

  2. We can now start selecting what database file we will use. If a database file does not exist, one will be created for us. To do this, we use a connection string:

    var databasePath = Path.Combine(FilesDir.AbsolutePath, "database.sqlite");
    var connectionString = string.Format("Data Source={0}",...