基于AS3.0的音乐播放器设计课程设计报告.doc

二维动画课程设计课程设计报告课程名称： 基于AS3.0的音乐播放器设计 院系： 物理与电子信息学院 学号： 070804017 姓名： 刘清亮 班级： 07数字媒体 日期： 2010 年 12 月 基于AS3.0的音乐播放器设计一、 序言设计基于AS3.0的音乐播放器，实现对音乐的基本操作，并显示歌词。Photoshop cs4； flash cs4/ActionScript3.0；二、 作品结构1. 文件结构 2图层结构 三、 设计步骤一、界面设计 1：上一首按钮，实例名为prev_btn;2:暂停和播放按钮重叠在一起，实例名分别为souPause和souPlay；3：下一首按钮，实例名next_btn；4：播放时间，实例名为songtime_txt；5：歌曲长度，实例名为songlenght_txt；6:歌词，实例名为lrc_txt； 7：进度滑块，实例名progKnob_mc；8：进度条，实例名为progBar_mc 9：静音，实例名volumeIcon_mc；10：音量控制，实例名volumeSlider_mc；10：列表：实例名playList_cb；二、功能实现 1.从XML文件中载人歌曲和歌词并提供给列表下拉var playList:XML = new XML();var xmlLoader:URLLoader = new URLLoader();var xmlReq:URLRequest = new URLRequest(playlist.xml);xmlLoader.load(xmlReq);var lrcList:XML = new XML();var lrcLoader:URLLoader = new URLLoader();var lrcReq:URLRequest = new URLRequest(lrclist.xml);lrcLoader.load(lrcReq);/将加载进的xml播放列表信息提供给播放下拉列表xmlLoader.addEventListener(Event.COMPLETE, completeHandler);lrcLoader.addEventListener(Event.COMPLETE, completeLrc);function completeHandler(evt:Event):voidplayList = XML(evt.target.data);playList_cb.dataProvider = new DataProvider(playList);loadSound(playList.song0.data);/E4X syntaxplayList_cb.selectedIndex = 0;currentSound = playList_cb.selectedIndex;function completeLrc(evt:Event):voidlrcList = XML(evt.target.data);loadSound(lrcList.lrc0.data);2下拉列表改变事件playList_cb.addEventListener(Event.CHANGE, changeHandler);function changeHandler(evt:Event):voidif (playList_cb.selectedItem.data != )currentSound = playList_cb.selectedIndex;loadSound(playList_cb.selectedItem.data);loadLrc(lrcList.lrccurrentSound.data);3.加载声音，播放声音/加载音乐函数function loadSound(file:String):voidreq = new URLRequest(file);pauseSound();sound = new Sound(req);sound.addEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);playSound();stage.addEventListener(Event.ENTER_FRAME,SoundPlaying);/播放音乐函数（缺省pos参数为0)function playSound(pos:Number = 0):voidsoundControl = sound.play(pos);soundControl.addEventListener(Event.SOUND_COMPLETE, nextSound);/播放下一首volumeAdjust();/音量初始化souPlay.visible=false;souPause.visible=true;progKnob_mc.addEventListener(Event.ENTER_FRAME, progKnobUpdate);4.歌词 function loadLrc(file:String):void req1=new URLRequest(file); var loader:URLLoader=new URLLoader(); loader.load(req1); loader.addEventListener(Event.COMPLETE,LoadFinish);歌词算法：function LoadFinish(evt:Event):void LRCarray=new Array(); var list:String=evt.target.data; var listarray:Array=list.split(n); var reg:RegExp=/0-50-9:0-50-9.0-90-9/g; for (var i=0; ilistarray.length; i+) var info:String=listarrayi; var len:int=info.match(reg).length; var timeAry:Array=info.match(reg); var lyric:String=info.substr(len*10); for (var k:int=0; kparaB.timer) return 1; if (paraA.timerparaB.timer) return -1; return 0; 5.显示歌词算法 function SoundPlaying(evt:Event):void for (var i=1; iLRCarray.length; i+) if (soundControl.positionLRCarrayi.timer) lrc_txt.text=LRCarrayi-1.lyric; break; lrc_txt.text=LRCarrayLRCarray.length-1.lyric; 6播放控制 /播放按钮行为和状态控制souPause.visible=false;souPlay.visible = true;prev_btn.visible = true;next_btn.visible = true;souPlay.addEventListener(MouseEvent.CLICK, soundPlay);souPause.addEventListener(MouseEvent.CLICK, soundPause);function soundPlay(e:MouseEvent):voidplaySound(soundControl.position);function soundPause(e:MouseEvent):voidpauseSound();prev_btn.addEventListener(MouseEvent.CLICK, prevSound);function prevSound(evt:MouseEvent):voidcurrentSound -;if(currentSound playList.song.length() - 1)currentSound = 1;playList_cb.selectedIndex = currentSound;loadSound(playList.songcurrentSound.data);loadLrc(lrcList.lrccurrentSound.data);7.音量控制 volumeDegrees = volumeSlider_mc.volumeKnob_mc.x;/初始化volumeSlider_mc.volumeKnob_mc.visible = true;volumeSlider_mc.volumeKnob_mc.addEventListener(MouseEvent.MOUSE_DOWN, volumeKnobStartDrag);function volumeKnobStartDrag(evt:MouseEvent):voidrec = new Rectangle(volumeSlider_mc.spanning_mc.x, volumeSlider_mc.volumeBar_mc.y, volumeSlider_mc.spanning_mc.width + 1, 0);volumeSlider_mc.volumeKnob_mc.startDrag(false, rec);stage.addEventListener(MouseEvent.MOUSE_MOVE, volumeAdjust);stage.addEventListener(MouseEvent.MOUSE_UP, volumeKnobStopDrag);function volumeKnobStopDrag(evt:MouseEvent):voidvolumeSlider_mc.volumeKnob_mc.stopDrag();if(volumeSlider_mc.volumeKnob_mc.x != 0)volumeDegrees = volumeSlider_mc.volumeKnob_mc.x;stage.removeEventListener(MouseEvent.MOUSE_UP, volumeKnobStopDrag);volumeSlider_mc.volumeKnob_mc.removeEventListener(MouseEvent.MOUSE_MOVE, volumeAdjust);function volumeAdjust(evt:MouseEvent = null):voidvolumeSlider_mc.volumeBar_mc.width = volumeSlider_mc.volumeKnob_mc.x;if(volumeSlider_mc.volumeKnob_mc.x = 0)volumeIcon_mc.gotoAndStop(mute);elsevolumeIcon_mc.gotoAndStop(unmute);/volumeDegrees = volumeSlider_mc.volumeKnob_mc.x;if (soundControl != null)xform = soundControl.soundTransform;xform.volume = volumeSlider_mc.volumeKnob_mc.x / volumeSlider_mc.spanning_mc.width;soundControl.soundTransform = xform;volumeIcon_mc.visible = true;volumeIcon_mc.addEventListener(MouseEvent.CLICK, switchVolumeStatus);function switchVolumeStatus(evt:MouseEvent):voidif(volumeIcon_mc.currentLabel = unmute)volumeDegrees = volumeSlider_mc.volumeKnob_mc.x;volumeSlider_mc.volumeKnob_mc.x = 0;volumeAdjust();volumeIcon_mc.gotoAndStop(mute);elsevolumeSlider_mc.volumeKnob_mc.x = volumeDegrees;volumeAdjust();volumeIcon_mc.gotoAndStop(unmute);8.进度控制 /进度条控制progKnob_mc.visible = true;function progKnobUpdate(evt:Event):voidsongtime_txt.text=getTimeFmt(soundControl.position);songlenght_txt.text=getTimeFmt(sound.length);var pos:Number = (progBar_mc.width - progKnob_mc.width) * soundControl.position / sound.length;if(!isNaN(pos)progKnob_mc.x = progBar_mc.x + pos;elseprogKnob_mc.x = progBar_mc.x;progKnob_mc.addEventListener(MouseEvent.MOUSE_DOWN, progKnobStartDrag);function progKnobStartDrag(evt:MouseEvent):voidif(sound != null)pauseSound();rec = new Rectangle(progBar_mc.x, progBar_mc.y, progBar_mc.width - progKnob_mc.width, 0);progKnob_mc.startDrag(false, rec);stage.addEventListener(MouseEvent.MOUSE_UP, progKnobStopDrag);function progKnobStopDrag(evt:MouseEvent):voidprogKnob_mc.stopDrag();var pos:Number = sound.length * (progKnob_mc.x - progBar_mc.x) / (progBar_mc.width - progKnob_mc.width);playSound(pos);stage.removeEventListener(MouseEvent.MOUSE_UP, progKnobStopDrag);9.频谱算法 /视觉化音频var ba:ByteArray = new ByteArray();var gr:Sprite = new Sprite();gr.x = 88;gr.y = 285;addChild(gr);var time:Timer = new Timer(50); time.addEventListener(TimerEvent.TIMER,timerHandler); time.start(); fun