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

Connecting Bluetooth devices


Along with WiFi and other network capabilities, Android also provides support for discovering and connecting to Bluetooth enabled devices. The android.bluetooth package contains several useful classes such as the BluetoothAdapater, which represents the device's own Bluetooth adapter. In this recipe the default BluetoothAdapter is used to check for already paired devices and be discovered by new devices that are in range.

Getting ready

Android emulators do not support Bluetooth so you will need a handset to test this code and you will also need another Bluetooth enabled device for the application to connect to.

When ready, start up a new Android project in Eclipse.

How to do it...

  1. Bluetooth applications require at least one permission to be set, so open up the Android Manifest file and add the following permissions:

    <uses-permission
      android:name="android.permission.BLUETOOTH"
      android:name="android.permission.BLUETOOTH_ADMIN" />
  2. In the main activity Java code...