问如何在播放远程mp3时添加进度条

EN

//assing total duration in milliseconds and divide by 1000 from your server

var totalDurationFromBackend = 898 // its in your case.Also divided by 1000 

var audioPlayer = Ti.Media.createAudioPlayer({ 

    url: 'http://naturallyimprove.com/mp3/Drone.mp3',
    allowBackground: true
});

var pb=Titanium.UI.createProgressBar
({
   top:10,
   width:250,
   height:'auto',
   min:0,
   max:totalDurationFromBackend,
   value:0,
   color:'#fff',
   style:Titanium.UI.iPhone.ProgressBarStyle.PLAIN,
});
win.add(pb);
pb.show();

audioPlayer.addEventListener('progress',function(e) 
{
   Ti.API.info('Time Played: ' + Math.round(e.progress) + ' milliseconds');

   // set the progress bar's progress value with current time played.. (milliseconds) 
   pb.value =  Math.round(e.progress/1000) ; 
});

startStopButton.addEventListener('click',function() {

// When paused, playing returns false.
// If both are false, playback is stopped.
if (audioPlayer.playing || audioPlayer.paused)
{
    audioPlayer.stop();
    pauseResumeButton.enabled = false;
    if (Ti.Platform.name === 'android')
    { 
        audioPlayer.release();
    }   
}
else
{
    audioPlayer.start();
    pauseResumeButton.enabled = true;
}
 });