[AS3]as3中声音类sound类用法的一个实例源代码

[AS3]as3中声音类sound类用法的一个实例源代码

package {    
                  import flash.display.Sprite;     
                  import flash.media.Sound;   
                  import flash.net.URLRequest;    
                  import flash.events.Event; 
   public class ProgressBar extends Sprite {        
                          private var _sound:Sound; 
 
  public function ProgressBar(  ) {             
                   addEventListener(Event.ENTER_FRAME, onEnterFrame);            
                    _sound = new Sound(new URLRequest("song.mp3"));           
                     _sound.play(  );       
                } 
public function onEnterFrame(event:Event):void{            
                    var barWidth:int = 200;             
                    var barHeight:int = 5;            
                    var loaded:int = _sound.bytesLoaded;          
                    var total:int = _sound.bytesTotal; 
          if(total > 0) {                
                   // CuPlayer.com提示：绘制白背景                
              graphics.clear(  );                 
                     graphics.beginFill(0xFFFFFF);               
                     graphics.drawRect(10, 10, barWidth, barHeight);                 
                     graphics.endFill(  );                 
                  // CuPlayer.com提示：已经加载数据的百分比                
              var percent:Number = loaded / total;                
                // Draw a bar that represents the percent of                 
                // the sound that has loaded                
                    graphics.beginFill(0xCCCCCC);                
                    graphics.drawRect(10, 10,barWidth * percent, barHeight);                
                    graphics.endFill(  );           
                         }       
               }   
        }   
  }