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One of several ways to create applications for Flash Player (version 10 or later)

Flex 3 and Flex 4 (combined with ActionScript 3) simplyprovide one of several ways that developers can produce downloadable applications that will run in Adobe's Flash Player (version 10 or later) or Adobe Air (see Resources ) .

Running Flash Player

Very briefly, Adobe Flash Player normally runs applications in a web browser while Adobe Air runs applications in a stand alone mode from the desktop.However, if you have installed Flex Builder 3 or Flash Builder 4, it is usually possible to cause Flash Player to start and run in a stand alone mode by double clicking on an swf file. (See Figure 1.) If double clicking doesn't work, you can locate and run the file namedFlashPlayer.exe. Once the Flash Player is running, you can open and run other swf files.

Why do I care about Flex and Flash Player?

One of the fastest growing segments of the game programming industry is the area of social games that typically run in Flash Player. I currently teach a coursetitled "Game Development using C++" and another course titled "Game and Simulation Programming I : C#" based on Microsoft's XNA Game Studio. I have a long-term interest inpossibly also teaching a course in "Game Development using Flex and ActionScript."

Flex and ActionScript

However, my more immediate interest is related to two other courses that I teach. One of those courses is an introduction to XML. The other course isObject-Oriented Programming using ActionScript 3.

Flex is an XML-based language that is used to produce mxml files. (In fact, Flex is simply a shorthand way of writing ActionScript program files. Whenyou compile Flex MXML files, they are automatically converted into ActionScript files before compilation.)

The resulting ActionScript files, along with other resources, are compiled into swf files that can beexecuted in Flash Player or Adobe Air.

Most of the lab projects in my XML course require the students to create Flex projects using both Flex 3 and Flex 4. Most of the lab projects in my more advanced ActionScript programming course require thestudents to use Flex as a launch pad for their ActionScript programs.

Flex SDK versus Flash Builder

Although it is possible to create Flex applications using nothing more than the free open source Flex SDKs (see Resources ) and a text editor, that can be tedious. Flash Builder 4 helps you to write mxml files containing layout and controls and makes theprocess somewhat more enjoyable. It will probably also help you to be more productive.

A complete Flex application

A complete Flex application consists of

  • One or more mxml files that may or may not embed ActionScript 3 code.
  • None, one or more ActionScript 3 files.
  • Various resource files such as image files, sound files, etc.

As mentioned earlier, these are compiled into a Flash swf file, which can be executed in either a Flash player or (in some cases) Adobe Air.

Division of responsibility

Flex provides the layout and control structure for the application in an XML format while ActionScript provides the program logic. (Of course, the whole thing can be written in ActionScript if you choose to do so.)

Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
salma
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
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Abhi
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
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is it a question of log
Abhi
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salma
Commplementary angles
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Uday
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salma
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
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a perfect square v²+2v+_
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algebra 2 Inequalities:If equation 2 = 0 it is an open set?
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or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
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rolling four fair dice and getting an even number an all four dice
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Kristine 2*2*2=8
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Differences Between Laspeyres and Paasche Indices
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No. 7x -4y is simplified from 4x + (3y + 3x) -7y
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how do you translate this in Algebraic Expressions
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Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
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. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
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what's the easiest and fastest way to the synthesize AgNP?
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Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
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Yasmin
what is the function of carbon nanotubes?
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I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
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what is nano technology
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what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Introduction to xml. OpenStax CNX. Dec 02, 2014 Download for free at https://legacy.cnx.org/content/col11207/1.18
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