Book Image

Near Field Communication with Android Cookbook

By : Subtil
Book Image

Near Field Communication with Android Cookbook

By: Subtil

Overview of this book

An easy-to-follow guide, full of hands-on examples of and real-world applications. Each recipe is explained and placed in context. If you want to learn how to create NFC-enabled Android applications, this is the book for you. Perhaps you already know a bit about Android application developments but have never used NFC, or perhaps you know a little about NFC android development but want some more advanced features and examples. In either case, this book will get you up and running quickly. You are expected to have Android programming knowledge.

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Near Field Communication with Android Cookbook
Subtil
Jun, 2014 | 286 pages
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Table of Contents (17 chapters)
Near Field Communication with Android Cookbook
Near Field Communication with Android Cookbook
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Getting Started with NFC
Getting Started with NFC
Introduction
Requesting NFC permissions
Indicating that your app uses NFC
Defining minimal requirements
Verifying whether the device has an NFC adapter
Downloading Open NFC Android Edition
Downloading Open NFC SDK Edition
Configuring the Open NFC Android add-on into your Android SDK
Configuring an NFC-enabled testing AVD
Configuring the Connection Center tool
Testing your app all together
2
Detecting a Tag
Detecting a Tag
Introduction
Understanding the foreground dispatch system
Understanding the tag dispatch system
Verifying if your app started because of an NFC intent
Filtering tags by their content type
Filtering tags by their content type programmatically
Filtering tags by their technology
Filtering tags by their technology using programs
Filtering URI tags
3
Writing Tag Content
Writing Tag Content
Introduction
Working with the NDEF record
Writing a URI-formatted record
Writing a text-formatted record
Using Android Application Record
Working with external types
Working with custom mimes
4
Writing Tag Content – Real-life Examples
Writing Tag Content – Real-life Examples
Introduction
Making a phone call with one tap – Part 1
Sending a predefined SMS – Part 1
Visiting our website
Leaving a (small) note – Part 1
5
Reading Tag Content
Reading Tag Content
Introduction
Obtaining NDEF Message from Intent
Getting the data out of the message
Reading a text-formatted record
Reading a URI-formatted record
Reading external types
Reading custom mimes
6
Reading Tag Content – Real-life Examples
Reading Tag Content – Real-life Examples
Introduction
Making a phone call with one tap – Part 2
Sending a predefined SMS – Part 2
Leaving a (small) note – Part 2
Getting the tag information
7
Sharing Content across Devices
Sharing Content across Devices
Introduction
Creating a basic peer-to-peer Hello World application
Sending texts to other devices
Sending a friend invite on Facebook
Inviting a friend to play a game – Part 1
8
Error Handling and Content Validation
Error Handling and Content Validation
Introduction
Handling tag-writing errors
Handling tag-reading errors
Testing the tag data for integrity
9
Extending NFC
Extending NFC
Introduction
Turning other adapters on/off
Configuring a Wi-Fi network
Starting a Wi-Fi hotspot
Inviting a friend to play a game – Part 2
Controlling hotel room access with Arduino and NFC – Part 1
Controlling hotel room access with Arduino and NFC – Part 2
10
Real-life Examples – NFC Utilities
Real-life Examples – NFC Utilities
Introduction
Creating multi-action tags
Choosing the best format for our data
Locking tags
Joking with a friend
Index
Index

Sending texts to other devices

Android Beam uses the standard NdefMessage parameter to share data between devices, and as we learned in Chapter 3, Writing Tag Content, we can encapsulate the text to NdefMessage. In this recipe, we will create a simple application that sends texts to other devices.

How to do it…

In this application, we will send the content of TextView to another device through an NdefMessage, which is formatted as RTD_TEXT, as shown in the following steps:

  1. Open Eclipse and create a new Android application project named NfcBookCh7Example2 and a package named nfcbook.ch7.example2.

  2. Make sure the AndroidManifest.xml file is configured correctly. Refer to the Requesting NFC permissions recipe in Chapter 1, Getting Started with NFC.

  3. Set the minimum SDK version to 14 with the following code:

    <uses-sdk android:minSdkVersion="14" />

  4. Add the following intent-filters to MainActivity in the AndroidManifest file:

    <intent-filter>
  <action android:name="android.nfc.action.NDEF_DISCOVERED...
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