博客中 Flex4/Flash mp3音乐播放器实例 含演示地址

要求

• 必备知识

  本文要求基本了解 Adobe Flex编程知识和JAVA基础知识。

• 开发环境

  MyEclipse10/Flash Builder4.6/Flash Player11及以上

• 演示地址

  演示地址 资料下载

 

播放器演示已经在博客banner部分给出了,下面还是上一截图吧:

下面是程序的核心业务代码:

<?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="330" height="75" backgroundAlpha="1.0" backgroundColor="#9C4B4B"
               preloaderChromeColor="#060606" 
               creationComplete="initApp()">
    <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 mx.collections.ArrayCollection;
            import mx.controls.Alert;
            
            
            
            /**
             * musicItem Object  音乐信息对象
             */
            [Bindable]
            public var musicItem:Object;
            
            
            
            /**
             * 音乐是否正在播放 
             */
            private var isplaying:Boolean = false;
            
            
            /**
             * 播放器音量 
             */
            private var currentVolum:Number =0.5;
            /**
             * 正在播放的音乐的URL字符串
             * 从主程序中获得 player.currentMusicUrlString=musicSource;
             */
            public var currentMusicUrlString:String;
            /**
             * 正在播放的音乐的URLRequest 
             */
            private var currentMusicUrlRequest:URLRequest;            
            /**
             * 正在播放的音乐的Sound 
             */
            private var currentMusicSound:Sound;
            /**
             * 正在播放的音乐的SoungChannel 
             * SoundChannel 类控制应用程序中的声音。每个声音均分配给一个声道，而且应用程序可以具有混合在一起的多个声道。SoundChannel 类包含 stop() 方法、用于监控声道幅度（音量）的属性以及用于对声道指定 SoundTransform 对象的属性。 
             */
            private var currentMusicChannel:SoundChannel;
            /**
             * 正在播放的音乐的 SoundTransform
             * SoundTransform 类包含音量和平移的属性。
             */
            private var currentMusicTransform:SoundTransform;
            
            /**
             * 正在播放的音乐的总时间 
             */
            private var currentMusicTotleTime:Number =0;
            /**
             * 正在播放的音乐的播放进度参数 
             */
            private var currentMusicPosition:int =0;
            
                      
            private var songs:ArrayCollection=new ArrayCollection([
                {name:"初恋",singer:"张力尹",pic:"data/images/zly.jpg",uri:"data/chulian.mp3"},
                {name:"纯真的爱",singer:"张力尹",pic:"data/images/zly.jpg",uri:"data/chunzhendeai.mp3"},
                {name:"相信爱",singer:"张力尹",pic:"data/images/zly.jpg",uri:"data/xiangxinai.mp3"},
                {name:"星愿(I WILL)",singer:"张力尹",pic:"data/images/zly.jpg",uri:"data/I will.mp3"},
                {name:"TIMELESS",singer:"张力尹",pic:"data/images/zly.jpg",uri:"data/TIMELESS.mp3"},
                {name:"BLUE",singer:"BigBang",pic:"data/images/ALIVE-BIGBANG.jpg",uri:"data/BigBang - BLUE.mp3"},
                {name:"BLUE(指弹)",singer:"Gabriella Quevedo",pic:"data/images/ALIVE-BIGBANG.jpg",uri:"data/Gabriella Quevedo - blue.mp3"},
                {name:"You're Beautiful",singer:"James Blunt",pic:"data/images/s1461123.jpg",uri:"data/You're Beautiful.mp3"},
                {name:"Only Friends",singer:"Rita Calypso",pic:"data/images/s3786226.jpg",uri:"data/Only Friends.mp3"},
                {name:"총맞은것처럼(像中枪一样)",singer:"白智英",pic:"data/images/s3387692.jpg",uri:"data/Muz Cast - xiangzhongqiangyiyang.mp3"},
                {name:"是否",singer:"G.E.M",pic:"data/images/150_albumpic_444525_0[1].jpg",uri:"data/G.E.M. - shifou.mp3"},
                {name:"Young Girls",singer:"Bruno Mars",pic:"data/images/Bruno Mars.jpg",uri:"data/Bruno Mars - Young Girls.mp3"},
                {name:"Nothing On You",singer:"B.O.B&Bruno Mars",pic:"data/images/Bruno Mars.jpg",uri:"data/B.o.B. - Nothing On You.mp3"},
                {name:"Young Girls(指弹)",singer:"Gabriella Quevedo",pic:"data/images/Bruno Mars.jpg",uri:"data/Gabriella Quevedo-Young Girls.mp3"},
                {name:"Im Yours(指弹)",singer:"Gabriella Quevedo",pic:"data/images/Bruno Mars.jpg",uri:"data/Im Yours -Gabriella Quevedo.mp3"},
                {name:"金泰妍 - 가까이（靠近）",singer:"金泰妍 ",pic:"data/images/jintaiyan.jpg",uri:"data/closer.mp3"},
                {name:"Grace",singer:"李秀英  ",pic:"data/images/s2868209.jpg",uri:"data/Grace.mp3"},
                {name:"Twenty Nine",singer:"李秀英  ",pic:"data/images/s2722298.jpg",uri:"data/Twenty Nine.mp3"}
                
            ]);
            
            
            
            
            
            
            
            
            /**
             * 随机获取一首歌曲
             */
            private function getMusicItem():Object{
                var index: Number = Math.round(Math.random()*(songs.length-1));  //产生一个随机数
                musicItem=songs[index];            
                return musicItem;
            }
            
            
            
            
            /**
             * 程序初始化
             */
            private function initApp():void{
                //初始话一条数据
                getMusicItem();
                //UI控件事件监听
                playAndPause.addEventListener(MouseEvent.CLICK,musicPlay); //播放按钮
                next.addEventListener(MouseEvent.CLICK,autoPlayNext);
                playingProcess.addEventListener(Event.CHANGE,playingProcess_changeHandler); //进度条滚动事件
            }
            
            
            private function musicPlay(event:MouseEvent):void{
                if(!isplaying){  //播放  false
                    //此状态为 启动播放器 然后点击播放按钮 状态(空状态)    
                    if(currentMusicSound==null&&currentMusicChannel ==null){
                        currentMusicUrlString=musicItem.uri;
                        currentMusicUrlRequest =new URLRequest(currentMusicUrlString); 
                        currentMusicSound = new Sound();
                        currentMusicSound.load(currentMusicUrlRequest);
                        currentMusicSound.addEventListener(Event.COMPLETE,load_CompleteHandler);
                        currentMusicChannel = currentMusicSound.play();//开始播放
                        timer_GetCurrentPositionHandler();//同步更新已经播放的时间的计时器
                    }else{//此状态为 暂停后点击播放按钮 状态
                        currentMusicChannel = currentMusicSound.play(currentMusicPosition);
                    }
                    isplaying=true;
                }else{    //暂停
                    //此状态为 播放过程中点击 暂停按钮 状态
                    currentMusicPosition = currentMusicChannel.position;//记录暂停位置
                    currentMusicChannel.stop();//暂停
                    isplaying=false;
                }
                
                //currentMusicChannel.addEventListener(Event.SOUND_COMPLETE,autoPlayNext);//自动播放下一首
                
                
            }
            
            /**
             * 自动播放下一首  和 next按钮采用同样的方式吧
             * @param event
             * 
             */
            protected function autoPlayNext(event:Event):void{//过滤参数问题
                getMusicItem();
                if(currentMusicSound!=null&&currentMusicChannel!=null){
                    currentMusicChannel.stop();//暂停
                }
                clearPar();
                currentMusicUrlString=musicItem.uri;
                currentMusicUrlRequest =new URLRequest(currentMusicUrlString);
                currentMusicSound = new Sound();
                currentMusicSound.load(currentMusicUrlRequest);
                currentMusicSound.addEventListener(Event.COMPLETE,load_CompleteHandler);
                playAndPause.selected=true;
                isplaying =true;
                currentMusicChannel = currentMusicSound.play();//开始播放
                timer_GetCurrentPositionHandler();//同步更新已经播放的时间的计时器
                currentMusicChannel.addEventListener(Event.SOUND_COMPLETE,autoPlayNext);//自动播放下一首
                
            }
            
            
            
            
            
            
            /**
             * 正在播放的歌曲的总时长 
             */
            private var len:int;
            
            /**
             * 文件加载完成 能读取到音乐的总时长 
             * @param event
             * 
             */
            protected function load_CompleteHandler(event:Event):void{
                
                len = currentMusicSound.length;
                
                
            }
            
            /**
             * 同步更新已经播放的时间的计时器
             * 
             */
            protected function timer_GetCurrentPositionHandler():void{
                var clock:Timer = new Timer(100,int(len/1000/60*10));//每0.1秒更新一次
                clock.start();
                clock.addEventListener(TimerEvent.TIMER,showTime);
            }
            
            /**
             * 显示已经播放的总时间 
             * @param event
             * 
             */
            protected function showTime(event:Event):void{
                playingProcess.maximum = int(len/1000)*10;//最大值
                playingProcess.value = int(currentMusicPosition/1000*10); //当前值
                currentMusicPosition = currentMusicChannel.position;
            
            }
            
            
            
            /**
             * 播放进度条 可以拖动
             * @param event
             * 
             */
            protected function playingProcess_changeHandler(event:Event):void{
                if(currentMusicChannel!=null){
                    currentMusicPosition = playingProcess.value*1000/10;//当前音乐播放进度
                    currentMusicChannel.stop();
                    currentMusicChannel = currentMusicSound.play(currentMusicPosition);
                    isplaying=true;
                    
                    playAndPause.selected=true;
                    currentMusicChannel.addEventListener(Event.SOUND_COMPLETE,autoPlayNext);//自动播放下一首
                    
                }else{
                    
                    playingProcess.value=0;
                }
            }
            
            /**
             * 清除参数
             * currentMusicSound = null; 
             * currentMusicChannel = null;
             * currentMusicPosition = 0; 
             * 
             */
            private function clearPar():void{
                currentMusicSound = null;
                currentMusicChannel = null;
                currentMusicPosition = 0; 
            }
            
        ]]>
    </fx:Script>
    <s:Group  verticalCenter="0" >
        <!--背景-->
        <s:Rect width="330" height="75">
            <s:fill>
                <s:SolidColor color="#FFFFFF"/>
            </s:fill>
        </s:Rect>
        <s:BitmapImage source="{musicItem.pic}" smooth="true" width="75" height="75" />
        <s:VGroup left="85" top="10" right="10" bottom="0" gap="0">
            <s:HGroup height="45" width="235" verticalAlign="middle" >
                <s:VGroup height="45" gap="0" width="150">
                    <!--歌名-->
                    <s:Label maxDisplayedLines="1" width="100%" height="25" fontFamily="微软雅黑" fontSize="14"
                             fontWeight="bold" text="{musicItem.name}" verticalAlign="middle"/>
                    <!--歌手-->
                    <s:Label maxDisplayedLines="1" width="100%" height="20" fontFamily="微软雅黑" text="{musicItem.singer}"
                             verticalAlign="middle"/>
                </s:VGroup>
                <s:HGroup width="100%" horizontalAlign="right" gap="30" paddingRight="5">
                    <!--next-->
                    <s:Button id="next"  skinClass="components._ButtonSkin1"/>
                    <!--play-->
                    <s:ToggleButton id="playAndPause"  skinClass="components.pToggleButtonSkin1"/>
                </s:HGroup>
            </s:HGroup>
            <s:Group width="100%" height="20">
                <!--进度条-->
                <s:ScrubBar  id="playingProcess" horizontalCenter="0" verticalCenter="-2"  skinClass="skinks.playercontrol.scrubbar.ScrubBar"/>
            </s:Group>
        </s:VGroup>
    </s:Group>
        
    
</s:Application>

作者:Li-Cheng

出处:http://www.cnblogs.com/Li-Cheng/p/3598324.html

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