Flash CS4控制AS3中动画声音的播放或停止

今天有闪友问到如何控制as3中的声音问题，用下面的小实例说明：

复制代码

代码如下:

/*
as3sound.as
*/
package {
import flash.display.sprite;
import flash.events.*;
import flash.media.sound;
import flash.media.soundchannel;
import flash.net.urlrequest;
import flash.utils.timer;
import flash.text.textfield;
import flash.text.textfieldautosize;
import flash.filters.dropshadowfilter;
public class as3sound extends sprite {
private var url:string = "http://sxl001.xfyun.com/music/lib/myrussia.mp3";
private var soundfactory:sound;
private var channel:soundchannel;
private var positiontimer:timer;
private var play_btn:sprite;
private var stop_btn:sprite;
private var d_filtersropshadowfilter=new dropshadowfilter(5,45,0x000000,80,8,8);
//用于记录音乐现在是否为暂停状态
private var bsoundstop:boolean = false;
public function as3sound() {
var sxl_txt:textfield = new textfield();
sxl_txt.text="cs4中如何控制声音的播放或停止的";
sxl_txt.autosize=textfieldautosize.left;
sxl_txt.x=stage.stagewidth/2-sxl_txt.width/2;
sxl_txt.y=20;
addchild(sxl_txt);
var mp3_request:urlrequest = new urlrequest(url);
soundfactory = new sound();
//成功加载数据后
soundfactory.addeventlistener(event.complete, completehandler);
//在存在可用于 mp3 声音的 id3 数据时
soundfactory.addeventlistener(event.id3, id3handler);
//加载音乐错误时
soundfactory.addeventlistener(ioerrorevent.io_error, ioerrorhandler);
//音乐加载中...
soundfactory.addeventlistener(progressevent.progress, progresshandler);
soundfactory.load(mp3_request);
channel = soundfactory.play();
//音乐播放完成
channel.addeventlistener(event.sound_complete, soundcompletehandler);
//用timer监听音乐的播放进度
positiontimer = new timer(1000);
positiontimer.addeventlistener(timerevent.timer, positiontimerhandler);
positiontimer.start();
//创建一个按钮，用于播放音乐
play_btn = new sprite();
play_btn.graphics.beginfill(0xffcc32);
play_btn.graphics.drawroundrect(0, 0, 70, 18, 10, 10);
play_btn.graphics.endfill();
var play_txt:textfield = new textfield();
play_txt.text = "播放";
play_txt.x=18;
play_btn.x=50;
play_btn.y=100;
play_txt.selectable = false;
play_btn.addchild(play_txt);
play_btn.filters=[d_filters];
play_btn.addeventlistener(mouseevent.click, soundplay);
addchild(play_btn);
//创建一个按钮，用于停止音乐
stop_btn = new sprite();
stop_btn.graphics.beginfill(0xffcc32);
stop_btn.graphics.drawroundrect(0, 0, 70, 18, 10, 10);
stop_btn.graphics.endfill();
stop_btn.x=130;
stop_btn.y=100;
var stop_txt:textfield = new textfield();
stop_txt.x=18;
stop_txt.text = "暂停";
stop_txt.selectable = false;
stop_btn.addchild(stop_txt);
stop_btn.filters=[d_filters];
stop_btn.addeventlistener(mouseevent.click, soundstop);
addchild(stop_btn);
}
//监听音乐的播放进度
private function positiontimerhandler(event:timerevent):void {
var ybf:int = channel.position.tofixed(0);
var zcd:int = soundfactory.length;
var bfs:int = math.floor(ybf/zcd*100);
//trace("音乐总长度："+zcd, "音乐已播放："+ybf, "播放进度为："+bfs+"%");
}
//加载音乐完成时
private function completehandler(event:event):void {
//trace("加载音乐完成: " + event);
}
//在存在可用于mp3声音的id3数据时
private function id3handler(event:event):void {
//trace("音乐的id3信息如下:");
for (var s in soundfactory.id3) {
//trace("\t", s, ":", soundfactory.id3[s]);
}
//trace("关于id3信息介绍，请参见sound类-->属性-->id3");
}
//加载音乐错误时
private function ioerrorhandler(event:event):void {
//trace("加载音乐错误，错误信息如下：" + event);
positiontimer.stop();
}
//加载音乐时
private function progresshandler(eventrogressevent):void {
var yjz:int = event.bytesloaded;
var zcd:int = event.bytestotal;
var bfs:int = math.floor(yjz/zcd*100);
//trace("音乐总长度："+zcd,"已加载: "+yjz, "加载进度为："+bfs+"%");
}
//音乐播放完成
private function soundcompletehandler(event:event):void {
//trace("音乐播放完成: " + event);
positiontimer.stop();
}
//点击播放按钮事件
private function soundplay(event:mouseevent):void {
if (bsoundstop) {
bsoundstop = false;
channel = soundfactory.play(channel.position.tofixed(0));
}
}
//点击停止按钮事件
private function soundstop(event:mouseevent):void {
if (!bsoundstop) {
bsoundstop = true;
channel.stop();
}
}
}
}

以上就是flash cs4控制as3中动画声音的播放或停止方法，希望能对大家有所帮助！