Flex and Adobe Flash Builder allow developers to build mobile applications using one codebase that can be compiled for iOS, Android, and Blackberry. It uses MXML and ActionScript to create the graphical interface and behavior. Developers can build their first mobile app with Flex by following online tutorials that demonstrate consuming REST APIs and include code to display trends, tweets, and user info from Twitter. Flex is an open source framework supported by online documentation and an active developer community.

1. Mobile Development Mikael KROK

2. Mobile Development: Build Your Application With Flex and Adobe Flash
Builder
When I went to the French conference What’s Next in Paris
(http://mikaelkrok.net/component/content/article/44-java/124-whats-next-java-2011-
the-end) I was really impressed by the presentation of Flex and Adobe Flash Builder by
Michael Chaize.
Flex and Adobe Flash Builder is a development platform that allows a developer to build
a mobile application.
The problem when you want to develop a mobile application is that there are several
platforms. First of all, you have iOS for Iphone and Ipad. But if you are a java fan, you
would rather develop with that language and an open platform then you would choose
Android from Google. In the end, you also want to consider Blackberry and, why not,
Windows Mobile. The main reason is that if you want to start a professional application
then iOS, BlackBerry and Windows Mobile have the main panel of users ready to pay.
Then maybe Flex is a potential solution.
21/03/2012 Groupe NOVENCIA - 25 Rue de Maubeuge 75009 PARIS - Tél. : 01 44 63 53 13 - Fax : 01 44 63 53 14 - www.novencia.com - contact@novencia.com 2

3. One Code To Build Them All...
Adobe Flex platform allows you to develop one code and compile them into source code
for the three main platforms (iOS, Android, Blackberry).
The code provided by Adobe is MXML for the graphical layer. It’s a XML based language
very useful to describe view, event and graphical interactivity.
It is mixed with ActionScript 3 which is not that far from Java so nobody gets lost
21/03/2012 Groupe NOVENCIA - 25 Rue de Maubeuge 75009 PARIS - Tél. : 01 44 63 53 13 - Fax : 01 44 63 53 14 - www.novencia.com - contact@novencia.com 3

4. You Don’t Need A Virtual Machine with Adobe Flex 4.5 and greater
In previous version, you needed a layer to be able to run Flex software. In Flex 4.5 and
greater, there is no need of that. The code is directly compiled into native source code.
An Open Source Framework
Yes, you heard well! Flex is Open Source. This will bring joy in developer’s ears that need
to dig into source code to understand how it works.
Powerful Software Based On A Platform That Most Of Us Know
Flex can be developed with any editor you like but Adobe provides a powerful editor
which is Adobe Flash Builder (Last version is 4.6). That editor is based upon Eclipse so if
you are like me you will be neither disappointed nor lost.
You can develop with Eclipse but I recommend you to try Adobe Flash Builder
http://www.adobe.com/go/try_flashbuilder/
21/03/2012 Groupe NOVENCIA - 25 Rue de Maubeuge 75009 PARIS - Tél. : 01 44 63 53 13 - Fax : 01 44 63 53 14 - www.novencia.com - contact@novencia.com 4

5. Great Presentation, Great Documentation, Great Possibilities...
Adobe put a great deal of efforts to give developers enough materials to get a good
fresh start.
First of all, let me introduce you to Michael Chaize presentation (French) :
http://tv.adobe.com/fr/watch/adobe-live/presentation-dexperts-developpement-
dapplications-flex-mobile/
English
http://tv.adobe.com/watch/adobe-technology-sneaks-2011/sneak-peek-of-mobile-
application-development-with-flex-and-flash-builder/
21/03/2012 Groupe NOVENCIA - 25 Rue de Maubeuge 75009 PARIS - Tél. : 01 44 63 53 13 - Fax : 01 44 63 53 14 - www.novencia.com - contact@novencia.com 5

6. Then, when I started coding with Adobe Flash Builder, I followed this excellent, complete
and very precise tutorial :
http://www.adobe.com/devnet/flex/articles/twitter-trends.html
You will build 3 screens that consumes twitter REST api to show trends, tweets and user
info. Your first mobile application can be tested on a physical device and be packaged for
the 3 main mobile platforms.
At the end, there are websites, documentation; there is also a very active forum and a
fast growing community of experts.
A short list of interesting website :
- Adobe developer network : http://www.adobe.com/devnet.html
- http://flex.org/
- www.flex-tutorial.fr/
21/03/2012 Groupe NOVENCIA - 25 Rue de Maubeuge 75009 PARIS - Tél. : 01 44 63 53 13 - Fax : 01 44 63 53 14 - www.novencia.com - contact@novencia.com 6

7. In conclusion
If you are interested either in RIA (Rich Internet Application) or in mobile application
development, please give some minutes to take a look at Adobe Flex and take another
minute to try the Adobe Flash Builder. You won’t waste your time and you will probably
enjoy it as I did.
21/03/2012 Groupe NOVENCIA - 25 Rue de Maubeuge 75009 PARIS - Tél. : 01 44 63 53 13 - Fax : 01 44 63 53 14 - www.novencia.com - contact@novencia.com 7