Flex4实现音频播放器显示语音波形_JavaVideo java学习从这里开始

发表时间：33 分钟前

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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()"> <s:layout> <s:BasicLayout/> </s:layout> <fx:Declarations>  </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:Numbe

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