AS3之麦克风接口【flash.media.Microphone 类】

package {
    import flash.display.Shape;
    import flash.display.Sprite;
    import flash.events.ActivityEvent;
    import flash.events.Event;
    import flash.media.Microphone;
    public class SoundGame extends Sprite
    {
        private var main:Sprite;
        private var mic:Microphone;
        
        private var minHigh:int = 0;
        private var intervalValue:int = 0;
        
        public function SoundGame()
        {
            init();
        }
        
        //初始化
        private function init():void{
            initMic();
            createSky();
            createLand();
            createMain();
        }
        
        //初始化麦克风
        private function initMic():void{
            mic = Microphone.getMicrophone();
            mic.setSilenceLevel(30,0);
            mic.setLoopBack();
            
            mic.addEventListener(ActivityEvent.ACTIVITY,micActivityHandle);
        }
        
        //创建操作
        private function createMain():void{
            var mainContainer:Sprite = new Sprite;
            main = new Sprite;
            main.graphics.beginFill(0xffffff);
            main.graphics.drawCircle(-2,-4,4);
            mainContainer.x = 100;
            mainContainer.y = 250;
            mainContainer.addChild(main);
            addChild(mainContainer);
            
            main.addEventListener(Event.ENTER_FRAME,frameHandle);
        }
        
        //创建天
        private function createSky():void{
            var shape:Shape = new Shape;
            shape.graphics.beginFill(0x6699cc,1);
            shape.graphics.drawRect(0,0,400,250);
            addChild(shape);
        }
        
        //创建陆地
        private function createLand():void{
            var shape:Shape = new Shape;
            shape.graphics.beginFill(0x002222,1);
            shape.graphics.drawRect(0,250,400,150);
            addChild(shape);
        }
        
        //麦克风活跃处理
        private function micActivityHandle(e:ActivityEvent):void{
            if(e.activating && intervalValue == 0){
                intervalValue = mic.activityLevel / 5;
            }
        }
        
        //持续处理
        private function frameHandle(e:Event):void{
            if(intervalValue == 0) return;
            main.y -= intervalValue;
            intervalValue --;
            if(intervalValue == 0) intervalValue -= 1;
            
            //落地
            var min:int = - minHigh;
            if(min < main.y){
                main.y = min;
                intervalValue = 0;
            }
        }
    }
}