Book Image

Xamarin 4.x Cross-Platform Application Development - Third Edition

By : Jonathan Peppers
Book Image

Xamarin 4.x Cross-Platform Application Development - Third Edition

By: Jonathan Peppers

Overview of this book

Xamarin is a leading cross-platform application development tool used by top companies such as Coca-Cola, Honeywell, and Alaska Airlines to build apps. Version 4 features significant updates to the platform including the release of Xamarin.Forms 2.0 and improvements have been made to the iOS and Android designers. Xamarin was acquired by Microsoft so it is now a part of the Visual Studio family. This book will show you how to build applications for iOS, Android, and Windows. You will be walked through the process of creating an application that comes complete with a back-end web service and native features such as GPS location, camera, push notifications, and other core features. Additionally, you’ll learn how to use external libraries with Xamarin and Xamarin.Forms to create user interfaces. This book also provides instructions for Visual Studio and Windows. This edition has been updated with new screenshots and detailed steps to provide you with a holistic overview of the new features in Xamarin 4.
Table of Contents (19 chapters)
Xamarin 4.x Cross-Platform Application Development - Third Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Using XPath in Java bindings


So, before we get started on solving these issues in our Java binding, let's first clean up the namespaces in the project. Java namespaces are in the form com.mycompany.mylibrary by default, so let's change the definition to match C# more closely. In the Transforms directory of the project, open Metadata.xml and add the following XML tag inside the root metadata node:

<attr path="/api/package[@name='com.google.analytics.tracking   
  .android']" name="managedName">GoogleAnalytics.Tracking</attr> 

The attr node tells the Xamarin compiler what needs to be replaced, in the Java definition, with another value. In this case, we are replacing managedName of the package with GoogleAnalytics.Tracking because it will make much more sense in C#. The path value may look a bit strange, which is because it is using an XML matching query language named XPath. In general, just think of it as a pattern matching query for XML. For full documentation on XPath...