Book Image

Android 3.0 Application Development Cookbook

By : Kyle Merrifield Mew
Book Image

Android 3.0 Application Development Cookbook

By: Kyle Merrifield Mew

Overview of this book

<p>Android is a mobile operating system that runs on a staggering number of smartphones and tablets. Android offers developers the ability to build extremely rich and innovative applications written using the Java programming language. Among the number of books that have been published on the topic, what&rsquo;s missing is a thoroughly practical, hands-on book that takes you straight to getting your job done without boring you with too much theory.<br /><br />Android 3.0 Application Development Cookbook will take you straight to the information you need to get your applications up and running. This book is written to provide you with the shortest possible route between an idea and a working application. <br /><br />Work through the book from start to finish to become an Android expert, or use it as a reference book by applying recipes directly to your project.<br /><br />This book covers every aspect of mobile app development, starting with major application components and screen layout and design, before moving on to how to manage sensors such as internal gyroscopes and near field communications. Towards the end, it delves into smartphone multimedia capabilities as well as graphics and animation, web access, and GPS. <br /><br />Whether you are writing your first app or your hundredth, this is a book that you will come back to time and time again, with its many tips and tricks on the rich features of Android 3.</p>
Table of Contents (18 chapters)
Android 3.0 Application Development Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Applying shortcut keys and submenus


The Menu, ContextMenu, and MenuItem classes that we have covered in this chapter make up the key components of Android's menus. However there is still one class that we have not touched, the SubMenu, and no chapter on menus would be complete without a mention of shortcuts. As with other features, Android allows us to create and manipulate submenus and shortcuts using both XML and Java.

Getting ready

It is probably a good idea to use the project we created in the last recipe (Building menu groups of checkable items) but if you do not have it, start up an Android project and put together a quick menu XML file with three or four items in the res/menu folder. We will also need a TextView that is registered for a Context Menu.

How to do it...

  1. Open the menu file inside res/menu and replace the first item with the code below:

    <item
      android:id="@+id/sub_menu"
      android:title="sub menu">
      <menu>
        <item
          android:id="@+id/sub_one"
          android...