开发落网电台windows phone 8应用的计划(4)

昨天把应用的后台播放代理搞定了，但是运行的状况不太好，在网络不好的情况下有时候会崩溃，更多的时候是没有声音。

现在的任务就有两个了：一个是搞定网络，这部分还没有一个很好的计划，因为前台UI和后台播放代理的通信我还没有想到很好的办法，能想到的方法是借助backgroundPlayer的调用来解决，不过这就限制了后期功能的扩展，不过可能就先这么做吧；第二个是怎么处理好缓冲的问题。

先把后台代理放在这上面吧，还是简单版本。参照了csdn的做法，没有做网络。

  1 using System;
  2 using System.Diagnostics;
  3 using System.Windows;
  4 using Microsoft.Phone.BackgroundAudio;
  5 using System.Collections.Generic;
  6 using System.Threading;
  7 namespace LuooAudioPlayerAgent
  8 {
  9     public class AudioPlayer : AudioPlayerAgent
 10     {
 11         #region 字段
 12         static int currentTrackNumber=0;
 13         public static int totalNumber;
 14         private static List<AudioTrack> playList=new List<AudioTrack>()
 15         {
 16             new AudioTrack(new Uri("http://luoo.800edu.net/low/luoo/radio587/01.mp3",UriKind.Absolute),"1","","",null),
 17             new AudioTrack(new Uri("http://luoo.800edu.net/low/luoo/radio587/02.mp3",UriKind.Absolute),"2","","",null),
 18             //new AudioTrack(new Uri("http://luoo.800edu.net/low/luoo/radio587/03.mp3",UriKind.Absolute),"","","",null),
 19             //new AudioTrack(new Uri("http://luoo.800edu.net/low/luoo/radio587/04.mp3" , UriKind.Absolute) , "" , "" , "" , null)
 20         };
 21         #endregion
 22 
 23         static AudioPlayer()
 24         {
 25             //GetList();
 26             
 27             Deployment.Current.Dispatcher.BeginInvoke(delegate
 28             {
 29                 Application.Current.UnhandledException += UnhandledException;
 30             });
 31         }
 32 
 33         #region 出现未处理的异常时执行的代码
 34         private static void UnhandledException( object sender , ApplicationUnhandledExceptionEventArgs e )
 35         {
 36             if(Debugger.IsAttached)
 37             {
 38                 // 出现未处理的异常；强行进入调试器
 39                 Debugger.Break();
 40             }
 41         }
 42         #endregion
 43 
 44         protected override void OnPlayStateChanged( BackgroundAudioPlayer player , AudioTrack track , PlayState playState )
 45         {
 46             switch(playState)
 47             {
 48                 case PlayState.TrackEnded:
 49                     PlayNextTrack(player);
 50                     break;
 51                 case PlayState.TrackReady:
 52                     player.Play();
 53                     break;
 54             }
 55             NotifyComplete();
 56         }
 57 
 58         protected override void OnUserAction( BackgroundAudioPlayer player , AudioTrack track , UserAction action , object param )
 59         {
 60             switch(action)
 61             {
 62                 case UserAction.Play:
 63                     if(player.Track==null) player.Track=playList[currentTrackNumber];
 64                     player.Play();
 65                     break;
 66                 
 67                 case UserAction.Pause:
 68                     player.Pause();
 69                     break;
 70                 
 71                 case UserAction.SkipNext:
 72                     PlayNextTrack(player);
 73                     break;
 74 
 75                 case UserAction.SkipPrevious:
 76                     PlayPreviousTrack(player);
 77                     break;
 78 
 79                 //case UserAction.FastForward:
 80                 //    GetList();
 81                 //    break;
 82             }
 83             NotifyComplete();
 84         }
 85 
 86         #region  control
 87 
 88         private void PlayNextTrack( BackgroundAudioPlayer player )
 89         {
 90             if(++currentTrackNumber >=playList.Count)
 91             {
 92                 currentTrackNumber = 0;
 93             }
 94             player.Track=playList[currentTrackNumber];
 95             
 96         }
 97 
 98         private void PlayPreviousTrack( BackgroundAudioPlayer player )
 99         {
100             if(--currentTrackNumber < 0)
101             {
102                 currentTrackNumber = playList.Count - 1;
103             }
104             player.Track=playList[currentTrackNumber];
105             
106         }
107 
108         
109 
110         #endregion
111 
112     
113         protected override void OnError( BackgroundAudioPlayer player , AudioTrack track , Exception error , bool isFatal )
114         {
115             if(isFatal)
116             {
117                 Abort();
118             }
119             else
120             {
121                 NotifyComplete();
122             }
123 
124         }
125 
126         protected override void OnCancel()
127         {
128 
129         }
130 
131         public static void GetList()
132         {
133             playList.Add(new AudioTrack(new Uri("http://luoo.800edu.net/low/luoo/radio587/04.mp3" , UriKind.Absolute) , "4" , "" , "" , null));
134             //playList.Add(new AudioTrack(new Uri("http://luoo.800edu.net/low/luoo/radio587/02.mp3" , UriKind.Absolute) , "" , "" , "" , null));
135             //playList.Add(new AudioTrack(new Uri("http://luoo.800edu.net/low/luoo/radio587/03.mp3" , UriKind.Absolute) , "" , "" , "" , null));
136             //totalNumber=playList.Count;
137         }
138     }
139 }
View Code

 

 

posted on 2014-03-13 22:00  uestc小田  阅读(191)  评论(0)  编辑  收藏  举报

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