Android平板电脑上的StageVideo闪烁？

我有一个stageVideo类，我用它在平板电脑上播放视频，但每次我播放视频时，平板电脑屏幕都会闪烁几次（变黑，然后出来大约四次左右），我想知道是什么导致了这种情况。当我切换到播放视频的视图时，它会这样做。视频的url被传递到视频mxml视图。我正在使用Flex4.6和Android平板电脑（EEE transformer prime）

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下面是我的代码，用于在视频完成时播放视频的视图

<?xml version="1.0" encoding="utf-8"?>
<s:View xmlns:fx="http://ns.adobe.com/mxml/2009" 
    xmlns:s="library://ns.adobe.com/flex/spark" title="" backgroundAlpha="0" creationComplete="init(event)" addedToStage="onAddedToStage(event)"  >

<fx:Script>
    <![CDATA[

        import ios.iOSStageVideo;
        import mx.core.UIComponent;
        import mx.events.FlexEvent;



        protected var path:String = new String(""); 
        protected var backPage:String = new String("");
        protected var vid:iOSStageVideo = new iOSStageVideo( path , 1280 , 720 );
        private var arr:Array;
        //protected var vid:iOSStageVideo; 
        protected var container:UIComponent = new UIComponent(); 

        protected function init(event:FlexEvent):void
        {
            // Sets up the back button to back to the right slide
            arr =  data as Array;
            trace(data);
            path = String(arr[0]);
            backPage = String(arr[1]) 

            //creates the video
            vid = new iOSStageVideo( path , 1280 , 720 );
            loadVideo();

            //takes out the trash when the back button is hit so the stage video is ready when the new view is loaded
            stage.addEventListener("keyDown", handleButtons, false,1);
            stage.addEventListener("keyUp", handleButtons, false, 1);
        }

        override public function createReturnObject():Object {
            var returnedObject:Object = new Object();
            returnedObject.myValue = arr[2];
            trace("arr[2] ->" + arr[2])
            return returnedObject;
        }


        protected function loadVideo():void
        {
            //loades the video
            vid.addEventListener('videoDone' , videoStop); 
            container.width = stage.stageWidth; 
            container.height = stage.stageHeight; 

            addElement( container ); 
            container.addChild( vid ); 

        }

        protected function playVideo(event:MouseEvent):void
        {
            vid.playVideo();
        }

        private function videoStop(e:Event):void {
                //removes container
                container.removeChild( vid ); 
                removeElement( container ); 
                navigator.popView();
        }

        private function removeEverything():void {
            vid.stopVideoBack();
            try
            {
                container.removeChild( vid ); 
                removeElement( container );
            } 
            catch(error:Error) 
            {
                trace("error with container");
            }
        }

        protected function onAddedToStage(event:Event):void
        {               
            if (stage.autoOrients) {
                stage.removeEventListener(StageOrientationEvent.ORIENTATION_CHANGING, orientationChanging);
                stage.addEventListener(StageOrientationEvent.ORIENTATION_CHANGING, orientationChanging, false, 100, true);
            }
        }

        private function orientationChanging(event:StageOrientationEvent):void {
            event.stopImmediatePropagation();
            if (event.afterOrientation == StageOrientation.ROTATED_LEFT  || event.afterOrientation == StageOrientation.ROTATED_RIGHT) {
                event.preventDefault(); 
            }   
        }

        protected function handleButtons(event:KeyboardEvent):void
        {
            if (event.keyCode == Keyboard.HOME) {
                // Handle Home button.
            }
            else if (event.keyCode == Keyboard.BACK) {
                // Hanlde back button.
                removeEverything();
            }
        }

    ]]>
</fx:Script>
<fx:Declarations>
    <!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
</s:View>

添加了更新到代码中的StageVideoEvent侦听器，并简化为一个视图（还知道renderMode设置为direct）

---

这个应用程序中唯一的另一个视图只有一个带有navigator.pushView（Copyofvideo，null，null）的按钮；每次单击按钮时，屏幕都会闪烁，然后播放视频。

闪烁的一个可能原因是您在调用

\n s.play（）之前没有收听可用性。通过收听，您可以获得和丢失
StageVideo

而不是

private function onAddedToStage(e:Event):void
{ 
    ...
    _sv = stage.stageVideos[0]; 
    _sv.viewPort = new Rectangle(0, 42, videoWidth , videoHeight ); 
    _sv.attachNetStream(_ns); 

    playVideo(); 
} 

这样做

    private function onAddedToStage(e:Event):void
    {
        stage.addEventListener( StageVideoAvailabilityEvent.STAGE_VIDEO_AVAILABILITY, onStageVideoAvailability );
    }

    private function onStageVideoAvailability( event : StageVideoAvailabilityEvent ) : void
    {
        var available : Boolean = (event.availability == StageVideoAvailability.AVAILABLE);
        ...

        if ( available )
        {
            addStageVideo();
        }
        else
        {
            //implement an alternative e.g. addRegularVideo();
        }

        playVideo();
    }

Adobe Developer Connection在本教程中讨论了如何侦听StageVideo的可用性：


本教程提供了更多的代码示例：

是否尝试更改渲染模式？当舞台视频处于直接模式时，我遇到了问题。将其更改为CPU似乎可以解决我遇到的StageVideo问题。
它似乎仍在闪烁。我为stageVideoAvailability添加了一个事件侦听器，并试图将其简化为一个视图。新代码在帖子底部的added下。应该能够复制视图和编译器参数，并将renderMode设置为direct，然后添加视频并查看它。顺便谢谢你的帮助！你能解决闪烁和黑屏问题吗？
<?xml version="1.0" encoding="utf-8"?>
<s:View xmlns:fx="http://ns.adobe.com/mxml/2009" 
    xmlns:s="library://ns.adobe.com/flex/spark" title="video" backgroundAlpha="0" creationComplete="init(event)" >
<fx:Script>
    <![CDATA[
        import mx.core.UIComponent;

        protected var videoPath:String = new String("video.mp4"); 
        private var videoWidth:Number = 1280;
        private var videoHeight:Number = 680; 

        private var stageVideoAvail:Boolean;
        private var sv:StageVideo;

        private function init(e:Event):void {
            trace("ran one");
            onAddedToStage(); 
        }

        private function onAddedToStage():void {
            trace('test');
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT; 


               stage.addEventListener(StageVideoAvailabilityEvent.STAGE_VIDEO_AVAILABILITY, onStageVideoAvailability);

        }

        private function onStageVideoAvailability( e : StageVideoAvailabilityEvent ) : void
        {
            if (e.availability == StageVideoAvailability.AVAILABLE){
                stageVideoAvail = true;
                initVideo();
            } else {
                stageVideoAvail = false;
            }
        }

        private function initVideo():void
        {
            var obj:Object = new Object();
            var nc:NetConnection = new NetConnection();
            nc.connect(null);
            var ns:NetStream = new NetStream(nc);
            ns.client = obj;

            if(stageVideoAvail)
            {
                sv = stage.stageVideos[0];
                sv.addEventListener(StageVideoEvent.RENDER_STATE, onRender);
                sv.attachNetStream(ns);
                trace('available');
            }
            else
            {
                var vid:Video = new Video(videoWidth, 768);
                addChild(vid);
                vid.attachNetStream(ns);
                trace('not');
            }

            ns.play( videoPath );
        }

        private function onRender(e:StageVideoEvent):void
        {
            sv.viewPort = new Rectangle(0, 0, videoWidth, 768);
        }

        public function onMetaData(e:Object):void
        {

        }

        public function onXMPData(e:Object):void
        {

        }

    ]]>
</fx:Script>
<fx:Declarations>
    <!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
</s:View>

private function onAddedToStage(e:Event):void
{ 
    ...
    _sv = stage.stageVideos[0]; 
    _sv.viewPort = new Rectangle(0, 42, videoWidth , videoHeight ); 
    _sv.attachNetStream(_ns); 

    playVideo(); 
} 

    private function onAddedToStage(e:Event):void
    {
        stage.addEventListener( StageVideoAvailabilityEvent.STAGE_VIDEO_AVAILABILITY, onStageVideoAvailability );
    }

    private function onStageVideoAvailability( event : StageVideoAvailabilityEvent ) : void
    {
        var available : Boolean = (event.availability == StageVideoAvailability.AVAILABLE);
        ...

        if ( available )
        {
            addStageVideo();
        }
        else
        {
            //implement an alternative e.g. addRegularVideo();
        }

        playVideo();
    }