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

Composing messages


The next screen is a bit more complicated; we will need to create a ListView that uses multiple layout files for each row, depending on the type of the row. We'll also need to perform some layout tricks to place a view below the ListView and set up the ListView to autoscroll.

For the next screen, let's begin by creating a new layout named Messages.axml in the layout folder of the Resources directory and then perform the following steps:

  1. Drag a new ListView onto the layout. Set its Id to @+id/messageList.

  2. Check the box for Stack From Bottom, and set Transcript Mode to alwaysScroll. This will set it up to display items from the bottom up.

  3. Set the Weight value to 1 for the ListView in the Layout tab under the LinearLayout section.

  4. Drag a new RelativeLayout onto the layout. Let its Id be the default value, or remove it.

  5. Drag a new Button inside RelativeLayout. Set its Id to @+id/sendButton.

  6. Check the box for Align Parent Right in the Layout tab.

  7. Drag a new Plain Text found in the...