Learning Firefox OS Application Development

Building apps for Firefox OS
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Furthermore, you can try out and debug your own applications by editing them offline and online on your computer and see the changes live inside the simulated device without any hassle. Testing your applications in the simulator is nice, but it only gets you as far as a simulated environment can. If you want to test the performance of the app interaction, or react to things like device orientation, you need a real device.

Together with the developer tools and the App Manager, you can use the device and get detailed insight into what happens to your application as you use it. You can even change the app live without having to uninstall and update it.

Step 2: Offline Cache

This cookbook is for Java developers, RIA content developers, or graphic designers wanting to build To avoid having a similarly depressing experience, always test on a real device… or two, or more if you can get your hands on some. Also, always check the version history section because it lists what changed and has important information about decisions made before releasing each book update. This marks the end of Episode 1. You can add both hosted and packaged apps to the simulator.

The Marketplace for FirefoxOS is the place to list your application and make it available to people on their devices and the web. You also allow users to rate your app, give you feedback and to buy your application using a simple checkout process.

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Getting your app listed is simple:. Applications submitted to the Marketplace are reviewed by Mozilla's App team and you will get notfied of the state of your submission within a few days. If there are issues with your application you will already get a validation message during the submission but you might also get a human readable explanation what is wrong and how to fix it later.

Smartphones are full of great technology: cameras, accelerometer, GPS to name but a few. The problem was that all of these were out of the reach of web technologies - if you wanted to access them, you needed to write native applications. To fix this, Mozilla and partners defined a set of APIs that allow developers to reach deep into the hardware of a mobile devices using JavaScript in a secure manner.

These are called Web APIs and are defined in the open and available for others to implement. Firefox OS is the first platform that uses them and allows you to simply access all the interesting parts of a smartphone without having to build native applications. Instead of getting an API to speak to the device directly, Web Activities allow you to create an ecosystem of applications on the device talking to each other.

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For example, instead of trying to access the camera, your app would ask for an image and the users of the device can use their favourite application to take a photo. Instead of asking the users for access to the hardware which is important in terms of security , you allow them to use applications they already trust to do that.

Furthermore, you can register your application as the go-to application for certain tasks in the operating system. You can think of Web Activities as the same process right-clicking on a file in a Desktop OS does: you get several apps as the option to open this file and you have a chance to tell the OS to always use this app from now on for this kind of file. Web Activities allow apps to talk to each other - on the device, without any need of a server in-between.

All they transmit from one app to the other is the final data. This allows you to build applications that can stay closed and thus saving battery until they are needed. A very important part of an application for a mobile device. Notifications created this way also have the benefit of carrying no data thus Mozilla will never get the information of your app and attackers won't be able to listen in. Apps are of not much use if they don't work offline.

That's partly why we prefer them to just opening a browser and looking for content on our phones.

More to come!

Learning Firefox OS Application Development [Tanay Pant] on ykoketomel.ml * FREE* shipping on qualifying offers. Learn to design, build, and deploy your. Editorial Reviews. About the Author. Tanay Pant. Tanay Pant is a developer, white hat, and writer who has a passion for web development. He contributes code.

Our users will be offline - it just happens - and we need to ensure that our applications are still usable then. This is especially important as the term "Web applications" sounds like you need to be connected to use them.

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In many cases we are on a plane, underground or used up our data allowance on the SIM we are using, which is why it is important that apps built for Firefox OS work offline. We hope that this video series gave you a good start building your first Open Web Apps.

Learn How to Write Apps for the Firefox OS

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