前不久Adobe发布了Flash Player 11的release版本, Flash Player 11 带来了很多新特性, 最最红火的就是Stage3D了,但是这里讲的是这个版本的另一个新特性, 直接播放MP3数据 Sound.loadCompressedDataFromByteArray.
以往我们要播放一个mp3,必须要有一个路径才能播放, 每次想要将声音文件缓存起来,就不方便.现在Flash 提供了直接播放bytearray的API,那么就方便多了。Sound.loadCompressedDataFromByteArray带来的便利
- 直接播放bytearray,而不再需要url地址.
- 可以方便的播放音频片段,而不必加载完整的mp3文件.
- 结合URLStream类,可以方便的实现边听边存功能.
- 可以对保存的音乐进行加密,从而保护版权. 目前只想到以上几点,不过结合这个API肯定能做更多的事。
使用FlahsPlayer11的新特性注意事项
一定要在编译器选项里添加 -swf-version=13 . 否则会运行时报错,找不到相关的API。
-swf-version=13 ， 一路确定着出来就行了。 FlashDevelop里设置Flashplayer11编译器选项
在FlashBuilder里设置：
Project菜单 => Properties..子菜单, 打开 Properties面板。Flex编译器选项 => 附加的编译器参数。添加-swf-version=13 ，一路确定着出来就行了。 FlashBuilder里设置Flashplayer11编译器选项
示例
请确保声卡驱动已经安装好，并且能播放声音。
源代码
package { import fl.controls.TextInput; import fl.events.ComponentEvent; import flash.display.Sprite; import flash.events.Event; import flash.events.IOErrorEvent; import flash.events.ProgressEvent; import flash.events.SecurityErrorEvent; import flash.media.Sound; import flash.media.SoundChannel; import flash.net.URLRequest; import flash.net.URLStream; import flash.text.TextField; import flash.utils.ByteArray; import flash.utils.setTimeout; /** * Sound.loadCompressedDataFromByteArray * @author lite3 * @link http://www.litefeel.com */ [SWF(width = 600, height = 170)] public class Main extends Sprite { private const SOUND_URL:String = "http://www.sqcbbs.net/data/attachment/forum/music/suyan.mp3"; private var sound:Sound; private var stream:URLStream; private var isPlaying:Boolean; private var sc:SoundChannel; private var txt:TextField; private var input:TextInput; public function Main():void { initUI(); sound = new Sound(); stream = new URLStream(); stream.addEventListener(Event.COMPLETE, streamHandler); stream.addEventListener(ProgressEvent.PROGRESS, streamHandler); stream.addEventListener(IOErrorEvent.IO_ERROR, streamHandler); stream.addEventListener(SecurityErrorEvent.SECURITY_ERROR, streamHandler); var url:String = loaderInfo.parameters.soundURL ? loaderInfo.parameters.soundURL : SOUND_URL; input.text = url; loadSound(null); input.addEventListener(ComponentEvent.ENTER, loadSound); } private function loadSound(e:ComponentEvent):void { if (!input.text) return; if (sc != null) { sc.removeEventListener(Event.SOUND_COMPLETE, soundCompleteHandler); sc.stop(); sc = null; } try { stream.close(); }catch (e:Error) { } stream.load(new URLRequest(input.text)); showText("开始加载"); } private function streamHandler(e:Event):void { switch(e.type) { case Event.COMPLETE : showText("加载完成,播放中..."); var byte:ByteArray = new ByteArray(); stream.readBytes(byte, 4000, stream.bytesAvailable/10); sound.loadCompressedDataFromByteArray(byte, byte.length/2); playSound(); break; case ProgressEvent.PROGRESS : showText("加载进度:" + ProgressEvent(e).bytesLoaded + "/" + ProgressEvent(e).bytesTotal); break; case IOErrorEvent.IO_ERROR : showText("加载失败"); break; case SecurityErrorEvent.SECURITY_ERROR : showText("安全沙箱限制,不能从目标网站加载数据"); break; } } private function playSound():void { isPlaying = true; showText("isPlaying: " +isPlaying); sc = sound.play(); sc.addEventListener(Event.SOUND_COMPLETE, soundCompleteHandler); } private function soundCompleteHandler(e:Event):void { isPlaying = false; showText("isPlaying: " +isPlaying); setTimeout(playSound, 1000); } private function showText(text:String):void { txt.text = text; } private function initUI():void { txt = new TextField(); txt.mouseEnabled = false; txt.text = "Sound.loadCompressedDataFromByteArray For Flash Player 11"; txt.width = 600; txt.height = txt.textHeight + 4; txt.mouseEnabled = false; txt.autoSize = "center"; txt.y = 10; addChild(txt); txt = new TextField(); txt.text = "请输入MP3地址并回车,以更换MP3."; txt.mouseEnabled = false; txt.width = txt.textWidth + 4; txt.height = txt.textHeight + 4; txt.x = 10; txt.y = 100; addChild(txt); input = new TextInput(); input.width = 550; input.x = 10; input.y = 120; addChild(input); txt = new TextField(); txt.mouseEnabled = false; txt.width = 300; txt.height = 40; txt.x = 100; txt.y = 50; addChild(txt); } }}