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PhoneGap Beginners Guide (third edition)

You're reading from   PhoneGap Beginners Guide (third edition) Create, develop, debug, and deploy your very own mobile applications with PhoneGap

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Product type Paperback
Published in Jul 2015
Publisher
ISBN-13 9781784392284
Length 284 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (16) Chapters Close

Preface 1. Introduction to PhoneGap FREE CHAPTER 2. Building Your First PhoneGap Project 3. Mobile Frameworks 4. Working with Plugins 5. Using Device Storage and the Files API 6. Using the Contacts and Camera APIs 7. Accessing the Device Sensors and Locations API 8. Advanced PhoneGap 9. Getting Ready for Release 10. A Sample PhoneGap Project A. The JavaScript Quick Cheat Sheet B. Publishing Your App C. Related Plugin Resources D. PhoneGap Tools Index

Accelerometer

The PhoneGap Accelerometer API allows you to detect the device movement change values relative to device orientation. Note that the accelerometer detects the values as a delta movement relative to the current device position. Even more important, it takes into consideration the effect of gravity (that is, 9.81 m/s2), so that when a device is lying flat on a table facing up, the value returned should be x = 0, y = 0, and z = 9.81.

As with any other plugin, you have to install the plugin before you can use it in your project. The plugin can be added to your project using the following command:

$ cordova plugin add cordova-plugin-device-motion

Once the plugin is installed on the project, a navigator.Accelerometer global object, is created and it is available to use once the deviceready event is fired. However, it is recommended that you still check for its presence before using it:

document.addEventListener("deviceready", onDeviceReady, false);

function onDeviceReady...
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