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Xamarin Mobile Application Development for Android, Second Edition

You're reading from   Xamarin Mobile Application Development for Android, Second Edition Develop, test, and deliver fully-featured Android applications using Xamarin

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Product type Paperback
Published in Aug 2015
Publisher Packt
ISBN-13 9781785280375
Length 296 pages
Edition 1st Edition
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Toc

Table of Contents (13) Chapters Close

Preface 1. The Anatomy of an Android App FREE CHAPTER 2. The Xamarin.Android Architecture 3. Creating the Points Of Interest App 4. Adding a List View 5. Adding a Details View 6. Making Your App Orientation-aware 7. Designing for Multiple Screen Sizes 8. Creating Data Storage Mechanisms 9. Making POIApp Location Aware 10. Adding the Camera App Integration 11. Publishing an App to the App Store Index

Populating row Views


Now that we have an instance of the view, we need to populate the fields. The View class defines a named FindViewById<T> method, which returns a typed instance of a widget contained in the view. You pass in the resource ID defined in the layout file to specify the control you wish to access.

The following code returns access to nameTextView and sets the Text property:

PointOfInterest poi = this [position];
view.FindViewById<TextView>(Resource.Id.nameTextView).Text = poi.Name;

Populating addrTextView is slightly more complicated because we only want to use the portions of the address we have, and we want to hide the TextView if none of the address components are present.

The View.Visibility property allows you to control the visibility property of a view. In our case, we want to use the ViewState.Gone value if none of the components of the address are present. The following code shows the logic in GetView:

if (String.IsNullOrEmpty (poi.Address)) {
     view.FindViewById...
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