直接上代码，在Flash Builder 4中新建 FLEX项目，复制代码可以可以直接运行
需要将 file = "D:\\voice\\3791.MP3"; 改为自己的路径
以后还准备增加流式播放！
<?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"
minWidth="955" minHeight="600"
creationComplete="initMusic()"
height="304" width="808">
<s:layout>
<s:BasicLayout/>
</s:layout>
<fx:Declarations>
<!-- 将非可视元素（例如服务、值对象）放在此处 -->
</fx:Declarations>
<fx:Script>
<![CDATA[
import com.adobe.serialization.json.JSON;
import flash.utils.ByteArray;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.core.UIComponent;
import mx.events.IndexChangedEvent;
import mx.managers.PopUpManager;
import mx.printing.FlexPrintJob;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.rpc.http.HTTPService;
private var serverIP:String = "http://127.0.0.1";
private var ba:ByteArray = new ByteArray();
private var soundRequest:URLRequest;
private var sound:Sound = new Sound(); //使用Sound对象来获取音乐文件播放声音
private var chanel:SoundChannel; //引入SoundChannel对象来精确控制声音
private var vol:SoundTransform; //通过设置SoundTransform对象的volume属性控制音量
private var stopPosition:int=0; //使用stopPosition记录暂停音乐时的位置
private var soundState:int=1; //使用soundState记录是否静音
private var soundValue:int=2; //记录静音前的音量
private var playState:int=0; //使用playState记录声音是否被停止（包括暂停）
private var totalTime:String = "00:00";//语音文件总时间
private var params:Object; //URL参数列表
private var _sperite:Sprite; //用于绘制声音波形
//初始化
private function initMusic():void{
var args:Object = getParams(); //获取URL中的参数列表
var file:String = serverIP + args.audio+".mp3";//得到语音文件名
// file = "http://127.0.0.1/voice/3416.mp3";
//对播放控制按钮和滑动条添加鼠标动作监听
soundBtn.addEventListener(MouseEvent.CLICK,onSoundClick);//有声音
soundBtnJ.addEventListener(MouseEvent.CLICK,onSoundClick);//静音
playBtn.addEventListener(MouseEvent.CLICK,onPlayBtnClick);//播放
pauseBtn.addEventListener(MouseEvent.CLICK,onPlayBtnClick);//暂停
proccessBar.addEventListener(MouseEvent.MOUSE_DOWN,onProccessBarDown);//播放进度条
proccessBar.addEventListener(MouseEvent.MOUSE_UP,onProccessBarUp);//播放进度条
//组件初始状态设置
soundSlide.value=2;//默认音量等于2
if(file != null && file != ""){
var buffer:SoundLoaderContext = new SoundLoaderContext(5000);
soundRequest = new URLRequest(file);
sound.load(soundRequest,buffer);
sound.addEventListener(Event.COMPLETE, loaded);//监听加载事件
sound.addEventListener(ProgressEvent.PROGRESS, progressHandler);//缓冲事件
}
//控制音量
vol = new SoundTransform();
vol.volume = soundSlide.value;
}
//缓冲事件方法
private function progressHandler(event:ProgressEvent):void{
//计算缓冲方框的宽度(滑块本身也有一定的宽度,减去约10个像素宽度)
if (sound.bytesLoaded>0){
bufferRect.width = sound.bytesLoaded / sound.bytesTotal*(proccessBar.width);
}
}
private function onProccessBarDown(e:MouseEvent):void{
this.removeEventListener(Event.ENTER_FRAME,onEnterFrame);
}
private function onProccessBarUp(e:MouseEvent):void{
this.addEventListener(Event.ENTER_FRAME,onEnterFrame);
}
//读取语音数据，一边取一边画
private function loaded(event:Event):void {
var width:Number = box.width;
var height:Number =box.height;
//获取语音长度，毫秒
var lengthTime:Number = sound.length;
totalTime = formatTime(lengthTime);
playTime.text = totalTime;
_sperite = new Sprite();//建立影片精灵
var uicomponent:UIComponent = new UIComponent();
uicomponent.addChild(_sperite);
box.addElement(uicomponent);
doDraw(0.1,0xffffff,0,height/2,width-2,height/2); //绘制中心轴线
//绘制横轴
for(var i:int=20;i<height;i+=20){
doDraw(0.1,0xCCCCCC,0,i,width-2,i); //绘制中心轴线
}
//绘制纵轴
for(var j:int=40;j<width;j+=40){
doDraw(0.1,0xCCCCCC,j,0,j,height); //绘制中心轴线
}
var dataCount:Number = lengthTime*44.1;
sound.extract(ba, dataCount); //将所有的语音数据读取到字节数组里面
ba.position = 0;//文件指针的当前位置
var startX:Number = 0,startY:Number = 100;//开始点
var m:int = 1;//记录数据个数
while(ba.bytesAvailable > 0){
var value:Number = ba.readFloat();
var endX:Number = m*width/dataCount;
var endY:Number = height/2;
endY = (1-value)*(height/2);//正数
doDraw(0.1, 0x00FF00, startX, startY, endX, endY);//绘制波形
startX = endX; startY = endY;
if(ba.bytesAvailable > 0){
ba.position += 84;
m += 11;
}
}
//完成自动播放
playState=1;
chanel = sound.play(stopPosition);
chanel.soundTransform=vol;
this.addEventListener(Event.ENTER_FRAME,onEnterFrame);
playBtn.visible=false;
pauseBtn.visible=true;
pState.text = "状态： 播放";
load.visible = false;
}
//绘制曲线
private function doDraw(cx:Number,color:uint,startX:Number,startY:Number,endX:Number,endY:Number):void{
_sperite.graphics.lineStyle(cx,color,1);
_sperite.graphics.moveTo(startX,startY);
_sperite.graphics.lineTo(endX,endY);
}
//播放暂停
private function onPlayBtnClick(e:MouseEvent):void{
//正常状态控制播放与暂停
if(playState==1){
playState=0;
stopPosition = chanel.position;
chanel.stop();
this.removeEventListener(Event.ENTER_FRAME,onEnterFrame);
playBtn.visible=true;
pauseBtn.visible=false;
pState.text = "状态： 暂停";
}else if(playState==0){
playState=1;
chanel = sound.play(stopPosition);
chanel.soundTransform=vol;
this.addEventListener(Event.ENTER_FRAME,onEnterFrame);
playBtn.visible=false;
pauseBtn.visible=true;
pState.text = "状态： 播放";
}
}
//停止播放
public function musStop():void{
playState=0;
stopPosition = 0;
this.removeEventListener(Event.ENTER_FRAME,onEnterFrame);
proccessBar.value=0;
playTime.text="00:00/"+totalTime;
playBtn.visible=true;
pauseBtn.visible=false;
pState.text = "状态： 停止";
if(chanel!=null){
chanel.stop();
}
}
//静音处理按钮
private function onSoundClick(e:MouseEvent):void{
//点击正常状态的静音按钮处理函数
if(soundState==1){
soundState=0;
vol.volume=0;
soundValue = soundSlide.value;
soundSlide.value=0;
soundBtnJ.visible=true;
soundBtn.visible=false;
}else if(soundState==0){
soundState=1;
soundSlide.value = soundValue;
vol.volume=soundSlide.value;
soundBtnJ.visible=false;
soundBtn.visible=true;
}
chanel.soundTransform=vol;
}
//控制音量大小
private function soundSlideChange():void{
vol.volume=soundSlide.value;
chanel.soundTransform=vol;
}
//控制播放进度
private function onEnterFrame(e:Event):void{
if(chanel!=null){
proccessBar.value=chanel.position*(100/sound.length);
playTime.text=formatTime(chanel.position) + "/" + totalTime;
if(proccessBar.value>99){
musStop();
}
}
}
//鼠标拖动进度条更改播放进度的处理
private function changePos():void{
if(chanel!=null){
chanel.stop();
//完成自动播放
playState=1;
chanel = sound.play(proccessBar.value*sound.length/100);
chanel.soundTransform=vol;
this.addEventListener(Event.ENTER_FRAME,onEnterFrame);
playBtn.visible=false;
pauseBtn.visible=true;
pState.text = "状态： 播放";
}
}
//时间格式处理
private function formatTime(time:Number):String{
var s:String;
var m:Number = Math.floor(time / 60000);//分钟
if(m >= 60){
//小时
var h:Number = Math.floor(m / 60);
if (h < 10)
s = "0" + h;
else
s = String(h);
//分钟
m = m - h*60;
if (m < 10)
s += ":0" + m;
else
s += ":" + String(m);
}else{
if (m < 10)
s = "0" + m;
else
s = String(m);
}
m = Math.floor((time / 1000 ) % 60)
if (m < 10)
s += ":0" + m;
else
s += ":" + m;
return s;
}
//从Url中得到参数，得到 ？ 以后的所有
private function getParams():Object {
params = {};
//获取整个URI
var query:String = ExternalInterface.call("window.location.search.substring", 1);
var url:String = ExternalInterface.call("window.location.href.toString", 1);
var index:int = url.indexOf("dsas")
serverIP = url.substring(0,index-1);
if(query) {
var pairs:Array = query.split("&");
for(var i:uint=0; i < pairs.length; i++) {
var pos:int = pairs[i].indexOf("=");
if(pos != -1) {
var argname:String = pairs[i].substring(0, pos);
var value:String = pairs[i].substring(pos+1);
params[argname] = value;
}
}
}
return params;
}
//下载语音文件
private function downLoadsVoice():void{
var args:Object = getParams(); //获取URL中的参数列表
var fileName:String = args.audio;
var file:String = serverIP + fileName + ".mp3";//得到语音文件名
var urlReq:URLRequest = new URLRequest(file);
var fileRef:FileReference = new FileReference();
var index:int = fileName.indexOf("voice/");
var tempFile:String = fileName.substring(index+6,fileName.length)+".mp3";
fileRef.download(urlReq,tempFile);
}
]]>
</fx:Script>
<s:Panel id="panel" x="1.3" y="1.35" width="806" height="302" title="乘务员标准化作业语音监控系统"
backgroundColor="#448FF5" backgroundAlpha="0.72" >
<s:Label x="738" y="-24" text="状态：暂停" id="pState" color="#FF0404" fontWeight="bold"/>
<s:BorderContainer x="2" y="2" width="800" height="200" id="box" backgroundColor="#0211D6">
<s:Label x="260" y="84" text="语音加载完成后自动播放，请稍后..." id="load" fontSize="20" color="#FC0000" fontWeight="bold" fontStyle="italic" fontFamily="Courier New"/>
</s:BorderContainer>
<s:BorderContainer id="bufferRect" x="1" y="210" width="7" height="7" buttonMode="true" borderColor="red" backgroundColor="red">
</s:BorderContainer>
<s:HSlider x="1" y="207" width="801" id="proccessBar" change="changePos()"
minimum="0" maximum="100" snapInterval="0.1" liveDragging="true"
showDataTip="false" height="13" alpha="0.5" buttonMode="true"/>
<mx:Image x="6" y="227" source="assets/play.png" id="playBtn"/>
<mx:Image x="6" y="227" source="assets/pause.png" id="pauseBtn" visible="false"/>
<mx:Image x="56" y="227" source="assets/stop.png" id="stopBtn" click="musStop()"/>
<mx:Image x="106" y="227" source="assets/volume.png" id="soundBtn"/>
<mx:Image x="106" y="227" source="assets/volumeJ.png" id="soundBtnJ" visible="false"/>
<s:HSlider x="149" y="238" width="107" id="soundSlide" change="soundSlideChange()" minimum="0" maximum="5"/>
<s:Label y="224" right="1" text="00:00" id="playTime"/>
<s:Button x="758" y="247" label="下载" width="46" click="downLoadsVoice()" id="dl"/>
</s:Panel>
</s:Application>
