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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

Adding actions to ActionBar


With Android 3.0 (Honeycomb, API level 11), Android introduced a uniform title, such as a widget that docks to the top of the screen, called ActionBar. It allows apps to add activity-specific actions to the top of the device screen, just below the status bar. We will define two actions for the POIListActivity class: New, to create a new POI, and Refresh, to refresh the cache of POIs from the device's local storage.

The Activity class provides the following virtual methods that can be overridden to add actions:

Virtual Method

Description

OnCreateOptionsMenu

It allows the creation of the actions either through API calls or through inflating an XML definition

OnOptionsItemSelected

It is called when an action in ActionBar is clicked

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