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
About the Author
About the Reviewer
Customer Feedback

Adding a login screen

Before creating Android views, it is important to know the different layouts or view group types available in Android. iOS does not have an equivalent for some of these because iOS has a smaller variation of screen sizes on its devices. Since Android has virtually infinite screen sizes and densities, the Android SDK has a lot of built-in support for auto-sizing and layout for views.

The following are the common types of layouts:

  • ViewGroup: This is the base class for a view that contains a collection of child views. You normally won't use this class directly.

  • LinearLayout: This is a layout that positions its child views in rows or columns (but not both). You can also set weights on each child, to have them span different percentages of the available space.

  • RelativeLayout: This is a layout that gives much more flexibility on the position of its children. You can position child views relative to each other so that they are above, below, to the left, or to the right of one...