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

Creating stop frame animations


Traditional animations can be constructed using a series of images, and Android provides the AnimationDrawable that can accomplish the same. Any number of slightly differing bitmaps can be defined as a list in XML and played in sequence to produce a stop frame animation.

Getting ready

Before we start we will require a number of images to act as the frames of our animation. As few as three or four is enough for demonstration purposes—we used the following:

As always with Android, the PNG format is preferred over other formats, although BMP, JPG and GIF are permitted. Depending on the screen density of your target device, store these bitmaps in the appropriate res/drawable folder. We called them image01.png, image02.png, and so on.

Note

When developing fully blown applications, it is more than likely that you will have to prepare three versions of these files.

How to do it...

  1. Create a new XML file called my_frames.xml in the res/drawable folder (or folders) you are...