flex学习笔记2

1 用flex做一个视频播放器
注意：如果VideoDisplay没有播放的内容时，调用stop会出现异常
Error: 1000: UNo bitrate match
先判断一下：if(flvideo.playing) flvideo.stop();
2 flex3中全屏模式
if(displayChk.selected)
                {
                    stage.displayState="fullScreen";
                }else{
                    stage.displayState="normal";
                }
类flash.display.StageDisplayState未找到，因此直接使用字符串赋值
在flex的模板文件index.template.html中的AC_FL_RunContent调用参数中增加
 'allowFullScreen','true',
在object中增加
embed下增加
allowfullscreen="true"
才能使用全屏模式

视频播放器源码，包括音量、全屏模式、网络flv播放、定位播放

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"  width="835" height="782" >
<mx:Script>
  <![CDATA[
     import mx.events.SliderEvent; // 这里是导入所需要的类, 用 import 关键字, 没什么好说的
     import mx.events.VideoEvent;
    import flash.events.KeyboardEvent;
    import mx.controls.Alert;   
   import flash.display.Stage;
     private var soundPosition:Number;
// 自定义一个 playingMove() 函数, 作用: 影片播放时, id 为 " my_hs " 的HSlider 控件的值为影片的播放时间, 且最大值为影片的总时长
     private function playingMove(event:VideoEvent):void{
         my_hs.value = flvideo.playheadTime;
        my_hs.maximum=flvideo.totalTime;
   }
// 自定义 hs_onChange() 函数, 作用: 当用户拖拉 HSlider 控件使其值发生改变时,  影片的播放头就处于其值处, 即正在播放时间处于其值处
    private function hs_onchange(event:SliderEvent):void{
       flvideo.playheadTime = event.value;
   }
//停止
    private function stopMovie(event:MouseEvent):void{
        flvideo.stop();
    }
//播放
    private function playMovie(event:MouseEvent):void{
    	
    	playUrl(urlText.text);
    	
    }
//暂停
    private function pauseMovie(event:MouseEvent):void{
        flvideo.pause();
    }
//下拉框
    private function onChangeUrl(event:KeyboardEvent):void{
    	trace(event.keyCode);
    	if(event.keyCode==13){
        playUrl(urlText.text);
        
     }
    }  
    private function playUrl(url:String):void
    {
    	if(flvideo.playing)
    	 flvideo.stop();
    	
        flvideo.source = url;
        flvideo.play();
    }
   //声音音量控制    		   		 
    		private function sound_thumbChanges(event:SliderEvent):void{
    			soundPosition = hs_sound.value;
    		}
    		
    	 
    		private function sound_thumbRelease(event:SliderEvent):void{
    			flvideo.volume = soundPosition;
    		}
//格式化时间
    		private function formatTimes(value:int):String{
    			var result:String = (value % 60).toString();
    			
		        if (result.length == 1){
		            result = Math.floor(value / 60).toString() + ":0" + result;
		        } else {
		            result = Math.floor(value / 60).toString() + ":" + result;
		        }
		        return result;
    		}
    		private function displayStateChange():void
    		{
    			if(displayChk.selected)
    			{
    				stage.displayState="fullScreen";
    			}else{
    				stage.displayState="normal";
    			}
    		}
    		
  ]]>
</mx:Script>
<mx:XML id="xmlData" source="FlvData.xml" format="xml" />
<mx:VideoDisplay id="flvideo" playheadUpdate="playingMove(event)"  x="10" y="10" autoPlay="false" bufferTime="0.5" maintainAspectRatio="false" width="294" height="219"/>
    <mx:ControlBar id="ctrlBar" x="10" y="237" width="545" height="52">
          <mx:TextInput id="urlText" width="150" keyUp="onChangeUrl(event)" fontFamily="Arial" fontSize="12" color="#2C2B3A" enabled="true" height="26" toolTip="请输入flv文件的网络地址"/>
        <mx:Button  label="Play" click="playMovie(event)"/>
        <mx:Button  label="Stop" click="stopMovie(event)"/>
        <mx:Button  label="pause" click="pauseMovie(event)"/>
        
    </mx:ControlBar>
    <mx:ControlBar id="ctrlBar0" x="10" y="297" width="545" height="52">
    <mx:Label 
		text="音量"
		color="#ffffff"/>
         <!--播放器声音控制 -->
        <mx:HSlider id="hs_sound" width="80"
            minimum="0" maximum="1"
        	thumbRelease="sound_thumbRelease(event)" 
            change="sound_thumbChanges(event)"
            value="{flvideo.volume}" />
        <mx:CheckBox id="displayChk" label="全屏模式" change="displayStateChange()"/>
       
    </mx:ControlBar>
    <mx:ControlBar id="ctrlBar1" x="10" y="357" width="545" height="52">
        <mx:Label x="480" y="341" id="playtime" 
		text="{formatTimes(flvideo.playheadTime)} : {formatTimes(flvideo.totalTime)}"
		color="#ffffff"/>
        <mx:HSlider  minimum="0"  id="my_hs"  change="hs_onchange(event)" width="179"/>
       
    </mx:ControlBar>
</mx:Application>