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PhoneGap By Example

PhoneGap By Example

By : Andrew Kovalenko
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PhoneGap By Example

PhoneGap By Example

By: Andrew Kovalenko

Overview of this book

PhoneGap is a free and open source framework that allows you to create mobile apps using standardized web APIs for the platforms you care about. It is one of the first and fastest spreading tools to develop hybrid applications using CSS, JavaScript, and HTML, without losing the advantages of native applications. If you are already a web developer, this book will provide you with the skills you need to create, customize, test, and deploy hybrid mobile applications. Starting from the beginning, this book will cover how to set up your PhoneGap development environment, add mobile web frameworks and plugins, design and customize the application layout, and utilize the embedded features of the PhoneGap framework. By working through the steps in each chapter, you will quickly master a variety of mobile applications with totally different approaches. You will then learn how to develop a PhoneGap plugin with native interfaces for iOS and Android, as well as common approaches to test PhoneGap applications. With ample screenshots that show you how to build a phenomenal application, PhoneGap by Example will ensure your success with this cutting-edge mobile development framework for hybrid applications.
Table of Contents (12 chapters)
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11
Index

Filesystem plugin installation and usage


The problem with a native camera is that it stores captured pictures in a temporary folder. For example, the imageURI from the camera plugin taken on an iPhone might look like this: file:///var/mobile/Containers/Data/Application/AB784267-B994-4B54-A81C-EF1180B18738/tmp/cdv_photo_005.jpg.

Next time you run the application, this tmp folder might be cleared. Here are a few possible solutions to the issue:

  • Use base64 data of the picture and store in the internal application's database

  • Move the picture to the persistent store where mobile OS is not able to remove files if more space is needed

The first option doesn't work because there is a limit for database file size and, on modern devices, pictures can be really high-quality and, thus, large. I tried to use this approach and was able to save only three pictures on an iPhone 5. Four pictures were taking more space in the database than is allowed.

So, I followed the second approach. There is a good Cordova...

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