我们将使用Flash Builder 4.5创建Flex应用程序。 让我们从一个简单的 HelloWorld 应用程序开始:
步骤1 - 创建项目
第一步是使用Flash Builder IDE创建一个简单的Flex项目。 使用选项File > New > Flex Project。 现在,使用向导窗口将您的项目命名为 HelloWorld ,如下所示:

如果未选择,请选择应用程序类型 Web(在Adobe Flash Player中运行),并保留其他默认值,然后单击完成按钮。 项目创建成功后,您的项目资源管理器中将包含以下内容:

以下是所有重要文件夹的简要说明:
夹 | 位置 |
---|---|
表格边框 |
|
bin-debug |
|
html-template |
|
步骤2 - 创建外部CSS文件
在 html-template 文件夹中为Wrapper HTML页面创建CSS文件 styles.css 。
- html, body {
- height:100%;
- }
- body {
- margin:0;
- padding:0;
- overflow:auto;
- text-align:center;
- }
- object:focus {
- outline:none;
- }
- #flashContent {
- display:none;
- }
- .pluginHeader {
- font-family:Arial, Helvetica, sans-serif;
- font-size:14px;
- color:#9b1204;
- text-decoration:none;
- font-weight:bold;
- }
- .pluginInstallText {
- font-family:Arial, Helvetica, sans-serif;
- font-size:12px;
- color:#000000;
- line-height:18px;
- font-style:normal;
- }
- .pluginText {
- font-family:Arial, Helvetica, sans-serif;
- font-size:12px;
- color:#000000;
- line-height:18px;
- font-style:normal;
- }
步骤3 - 修改包装HTML页面模板
在 html-template 文件夹中修改封装HTML页面模板 index.template.html 。 Flash Builder将创建一个默认的Wrapper HTML网页模板 html-template / index.template.html ,它将被编译为HelloWorld.html。 此文件包含Flash Builder在编译过程中替换的占位符,例如Flash Player版本,应用程序名称等。
让我们修改此文件以显示自定义消息,如果没有安装flash插件。
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
- "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
- <head>
- <title>${title}</title>
- <meta name="google" value="notranslate" />
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
- <link rel="stylesheet" href="styles.css" type="text/css"></link>
- <link rel="stylesheet" type="text/css" href="history/history.css" />
- <script type="text/javascript" table table-bordered="history/history.js"></script>
- <script type="text/javascript" table table-bordered="swfobject.js"></script>
- <script type="text/javascript">
- // For version detection, set to min. required Flash Player version,
- //or 0 (or 0.0.0), for no version detection.
- var swfVersionStr = "${version_major}.${version_minor}.${version_revision}";
- // To use express install, set to playerProductInstall.swf,
- //otherwise the empty string.
- var xiSwfUrlStr = "${expressInstallSwf}";
- var flashvars = {};
- var params = {};
- params.quality = "high";
- params.bgcolor = "${bgcolor}";
- params.allowscriptaccess = "sameDomain";
- params.allowfullscreen = "true";
- var attributes = {};
- attributes.id = "${application}";
- attributes.name = "${application}";
- attributes.align = "middle";
- swfobject.embedSWF(
- "${swf}.swf", "flashContent",
- "${width}", "${height}",
- swfVersionStr, xiSwfUrlStr,
- flashvars, params, attributes);
- // JavaScript enabled so display the flashContent div in case
- //it is not replaced with a swf object.
- swfobject.createCSS("#flashContent", "display:block;text-align:left;");
- </script>
- </head>
- <body>
- <div id="flashContent">
- <p style="margin:100px;">
- <table width="700" cellpadding="10" cellspacing="2" border="0">
- <tr><td class="pluginHeader">Flash Player Required</td></tr>
- <tr><td class="pluginText">The Adobe Flash Player version
- 10.2.0 or greater is required.</td></tr>
- <tr><td class = "pluginInstallText" align="left">
- <table border="0" width="100%">
- <tr class = "pluginInstallText" >
- <td>Click here to download and install Adobe Flash Player:</td>
- <td> </td>
- <td align="right"> <script type="text/javascript">
- var pageHost
- =((document.location.protocol == "https:") ? "https://" : "http://");
- document.write("<a target='_blank'"
- +" href='http://get.adobe.com/flashplayer/'><"
- +"img style='border-style: none' table table-bordered='"
- +pageHost
- +"www.adobe.com/images/shared/download_buttons/get_flash_player.gif'"
- +" alt='Get Adobe Flash player' /></a>" );
- </script>
- </td>
- </tr>
- </table>
- </td>
- </tr>
- </table>
- </p>
- </div>
- <noscript>
- <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
- width="${width}" height="${height}" id="${application}">
- <param name="movie" value="${swf}.swf" />
- <param name="quality" value="high" />
- <param name="bgcolor" value="${bgcolor}" />
- <param name="allowScriptAccess" value="sameDomain" />
- <param name="allowFullScreen" value="true" />
- <!--[if !IE]>-->
- <object type="application/x-shockwave-flash" data="${swf}.swf"
- width="${width}" height="${height}">
- <param name="quality" value="high" />
- <param name="bgcolor" value="${bgcolor}" />
- <param name="allowScriptAccess" value="sameDomain" />
- <param name="allowFullScreen" value="true" />
- <!--<![endif]-->
- <!--[if gte IE 6]>-->
- <p>
- <p style="margin:100px;">
- <table width="700" cellpadding="10" cellspacing="2" border="0">
- <tr><td class="pluginHeader">Flash Player Required</td></tr>
- <tr><td class="pluginText">The Adobe Flash Player version
- 10.2.0 or greater is required.</td></tr>
- <tr><td class = "pluginInstallText" align="left">
- <table border="0" width="100%">
- <tr class = "pluginInstallText" >
- <td>Click here to download and install Adobe Flash Player:</td>
- <td> </td>
- <td align="right"> <script type="text/javascript">
- var pageHost
- = ((document.location.protocol == "https:") ? "https://" : "http://");
- document.write("<a target='_blank'"
- +" href='http://get.adobe.com/flashplayer/'><"
- +"img style='border-style: none' table table-bordered='"
- +pageHost
- +"www.adobe.com/images/shared/download_buttons/get_flash_player.gif'"
- +" alt='Get Adobe Flash player' /></a>" );
- </script>
- </td>
- </tr>
- </table>
- </td>
- </tr>
- </table>
- </p>
- </p>
- <!--<![endif]-->
- <p style="margin:100px;">
- <table width="700" cellpadding="10" cellspacing="2" border="0">
- <tr><td class="pluginHeader">Flash Player Required</td></tr>
- <tr><td class="pluginText">The Adobe Flash Player version
- 10.2.0 or greater is required.</td></tr>
- <tr><td class = "pluginInstallText" align="left">
- <table border="0" width="100%">
- <tr class = "pluginInstallText" >
- <td>Click here to download and install Adobe Flash Player:</td>
- <td> </td>
- <td align="right"> <script type="text/javascript">
- var pageHost
- = ((document.location.protocol == "https:") ? "https://" : "http://");
- document.write("<a target='_blank'"
- +" href='http://get.adobe.com/flashplayer/'><"
- +"img style='border-style: none' table table-bordered='"
- +pageHost
- +"www.adobe.com/images/shared/download_buttons/get_flash_player.gif'"
- +" alt='Get Adobe Flash player' /></a>" );
- </script>
- </td>
- </tr>
- </table>
- </td>
- </tr>
- </table>
- </p>
- <!--[if !IE]>-->
- </object>
- <!--<![endif]-->
- </object>
- </noscript>
- </body>
- </html>
步骤4 - 创建内部CSS文件
在 table table-bordered / com / tutorialspoint 文件夹中为 HelloWorld.mxml 创建CSS文件 Style.css 。 Flex为其UI控件提供了类似的CSS样式,因为有HTML UI控件的CSS样式。
- /* CSS file */
- @namespace s "library://ns.adobe.com/flex/spark";
- @namespace mx "library://ns.adobe.com/flex/mx";
- .heading
- {
- fontFamily: Arial, Helvetica, sans-serif;
- fontSize: 17px;
- color: #9b1204;
- textDecoration:none;
- fontWeight:normal;
- }
- .button {
- fontWeight: bold;
- }
- .container {
- cornerRadius :10;
- horizontalCenter :0;
- borderColor: #777777;
- verticalCenter:0;
- backgroundColor: #efefef;
- }
步骤5 - 修改入口级类
Flash Builder将创建一个默认的mxml文件 table table-bordered / com.tutorialspoint / HelloWorld.mxml ,其具有根标签< application> 容器的应用程序。 让我们修改这个文件显示“Hello,World!":
- <?xml version="1.0" encoding="utf-8"?>
- <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
- xmlns:s="library://ns.adobe.com/flex/spark"
- xmlns:mx="library://ns.adobe.com/flex/mx"
- width="100%" height="100%"
- minWidth="500" minHeight="500"
- initialize="application_initializeHandler(event)">
- <fx:Style source="/com/tutorialspoint/client/Style.css"/>
- <fx:Script>
- <![CDATA[
- import mx.controls.Alert;
- import mx.events.FlexEvent;
- protected function btnClickMe_clickHandler(event:MouseEvent):void
- {
- Alert.show("Hello World!");
- }
- protected function application_initializeHandler(event:FlexEvent):void
- {
- lblHeader.text = "My Hello World Application";
- }
- ]]>
- </fx:Script>
- <s:BorderContainer width="500" height="500" id="mainContainer"
- styleName="container">
- <s:VGroup width="100%" height="100%" gap="50" horizontalAlign="center"
- verticalAlign="middle">
- <s:Label id="lblHeader" fontSize="40" color="0x777777"
- styleName="heading"/>
- <s:Button label="Click Me!" id="btnClickMe"
- click="btnClickMe_clickHandler(event)" styleName="button" />
- </s:VGroup>
- </s:BorderContainer>
- </s:Application>
您可以在同一源目录中创建更多的mxml或actionscript文件,以定义新应用程序或定义辅助程序。
步骤6 - 构建应用程序
Flash Builder默认已选中自动构建。 只要检查问题查看是否有任何错误。 完成更改后,您将看不到任何错误。
步骤7 - 运行应用程序
现在点击<img class="“inline" src"="" attachments="" tuploads="" flex="" run_icon.jpg="">运行应用程序菜单并选择 HelloWorld 应用程序来运行应用程序。

如果一切正常,您必须看到浏览器弹出和应用程序启动并运行。 如果一切顺利,您的应用程序,这将产生以下结果:[在线试用]
因为你是在flash播放器中运行你的应用程序,所以你需要为你的浏览器安装Flash Player插件。 只需按照屏幕上的说明安装插件。 如果您已经为浏览器设置了Flash Player插件,那么您应该可以看到以下输出:

恭喜! 您已使用Flex实施了第一个应用程序。
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