15.10.暂停和重新播放声音

package {
import flash.display.Sprite;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.net.URLRequest;
import flash.events.Event;
import flash.display.Sprite;
import flash.events.MouseEvent;
public class PlayPause extends Sprite {
private var _sound:Sound;
private var _channel:SoundChannel;
private var _playPauseButton:Sprite;
private var _playing:Boolean = false;
private var _position:int;
public function PlayPause( ) {
// Create sound and start it
_sound = new Sound(new URLRequest("song.mp3"));
_channel = _sound.play( );
_playing = true;
// A sprite to use as a Play/Pause button
_playPauseButton = new Sprite( );
addChild(_playPauseButton);
_playPauseButton.x = 10;
_playPauseButton.y = 20;
_playPauseButton.graphics.beginFill(0xcccccc);
_playPauseButton.graphics.drawRect(0, 0, 20, 20);
_playPauseButton.addEventListener(MouseEvent.MOUSE_UP,
onPlayPause);
}
public function onPlayPause(event:MouseEvent):void {
// If playing, stop. Take note of position
if(_playing) {
_position = _channel.position;
_channel.stop( );
}
else {
// If not playing, re-start it at
// last known position
_channel = _sound.play(_position);
}
_playing = !_playing;
}
}
}