Flash Player 与 HTML 容器之间发送数据的过程演示

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以下示例演示了在 Flash Player 与 HTML 容器之间发送数据的过程。package {
import flash.display.Sprite;
import flash.events.*;
import flash.external.ExternalInterface;
import flash.text.TextField;
import flash.utils.Timer;
import flash.text.TextFieldType;
import flash.text.TextFieldAutoSize;

public class ExternalInterfaceExample extends Sprite {
private var input:TextField;
private var output:TextField;
private var sendBtn:Sprite;

public function ExternalInterfaceExample() {
input = new TextField();
input.type = TextFieldType.INPUT;
input.background = true;
input.border = true;
input.width = 350;
input.height = 18;
addChild(input);

sendBtn = new Sprite();
sendBtn.mouseEnabled = true;
sendBtn.x = input.width + 10;
sendBtn.graphics.beginFill(0xCCCCCC);
sendBtn.graphics.drawRoundRect(0, 0, 80, 18, 10, 10);
sendBtn.graphics.endFill();
sendBtn.addEventListener(MouseEvent.CLICK, clickHandler);
addChild(sendBtn);

output = new TextField();
output.y = 25;
output.width = 450;
output.height = 325;
output.multiline = true;
output.wordWrap = true;
output.border = true;
output.text = “Initializing…\n”;
addChild(output);

if (ExternalInterface.available) {
try {
output.appendText(“Adding callback…\n”);
ExternalInterface.addCallback(“sendToActionScript”, receivedFromJavaScript);
if (checkJavaScriptReady()) {
output.appendText(“JavaScript is ready.\n”);
} else {
output.appendText(“JavaScript is not ready, creating timer.\n”);
var readyTimer:Timer = new Timer(100, 0);
readyTimer.addEventListener(TimerEvent.TIMER, timerHandler);
readyTimer.start();
}
} catch (error:SecurityError) {
output.appendText(“A SecurityError occurred: ” + error.message + “\n”);
} catch (error:Error) {
output.appendText(“An Error occurred: ” + error.message + “\n”);
}
} else {
output.appendText(“External interface is not available for this container.”);
}
}
private function receivedFromJavaScript(value:String):void {
output.appendText(“JavaScript says: ” + value + “\n”);
}
private function checkJavaScriptReady():Boolean {
var isReady:Boolean = ExternalInterface.call(“isReady”);
return isReady;
}
private function timerHandler(event:TimerEvent):void {
output.appendText(“Checking JavaScript status…\n”);
var isReady:Boolean = checkJavaScriptReady();
if (isReady) {
output.appendText(“JavaScript is ready.\n”);
Timer(event.target).stop();
}
}
private function clickHandler(event:MouseEvent):void {
if (ExternalInterface.available) {
ExternalInterface.call(“sendToJavaScript”, input.text);
}
}
}
}为了测试前面的 ActionScript 代码,请使用以下 HTML 模板嵌入生成的 SWF 文件: <!– saved from url=(0014)about:internet –>
<html lang=”en”>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ />
<title>ExternalInterfaceExample</title>
<script language=”JavaScript”>
var jsReady = false;
function isReady() {
return jsReady;
}
function pageInit() {
jsReady = true;
document.forms[“form1”].output.value += “\n” + “JavaScript is ready.\n”;
}
function thisMovie(movieName) {
if (navigator.appName.indexOf(“Microsoft”) != -1) {
return window[movieName];
} else {
return document[movieName];
}
}
function sendToActionScript(value) {
thisMovie(“ExternalInterfaceExample”).sendToActionScript(value);
}
function sendToJavaScript(value) {
document.forms[“form1”].output.value += “ActionScript says: ” + value + “\n”;
}
</script>
</head>
<body onload=”pageInit();”>

<object classid=”clsid:D27CDB6E-AE6D-11cf-96B8-444553540000″
id=”ExternalInterfaceExample” width=”500″ height=”375″
codebase=”http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab”>
<param name=”movie” value=”ExternalInterfaceExample.swf” />
<param name=”quality” value=”high” />
<param name=”bgcolor” value=”#869ca7″ />
<param name=”allowScriptAccess” value=”sameDomain” />
<embed src=”ExternalInterfaceExample.swf” quality=”high” bgcolor=”#869ca7″
width=”500″ height=”375″ name=”ExternalInterfaceExample” align=”middle”
play=”true” loop=”false” quality=”high” allowScriptAccess=”sameDomain”
type=”application/x-shockwave-flash”
pluginspage=”http://www.macromedia.com/go/getflashplayer”>
</embed>
</object>

<form name=”form1″ onsubmit=”return false;”>
<input type=”text” name=”input” value=”” />
<input type=”button” value=”Send” onclick=”sendToActionScript(this.form.input.value);” /><br />
<textarea cols=”60″ rows=”20″ name=”output” readonly=”true”>Initializing…</textarea>
</form>

</body>
</html>

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