播放音频使用BackgroundCapableMedia

Question

在Windows8的开发者预览版，我们可以利用这个代码在后台播放音频：

mediaElement.AudioCategory = AudioCategory.Media; 

在Windows8的客户perview，似乎我们应该使用，而不是AudioCategory.BackgroundCapableMedia AudioCategory.Media

mediaElement.AudioCategory=AudioCategory.BackgroundCapableMedia; 

，我在appxmanifest

<Extension Category="windows.backgroundTasks" EntryPoint="TestApp.App"> 
     <BackgroundTasks> 
      <Task Type="audio" /> 
     </BackgroundTasks> 
</Extension> 

还声明后台任务210

，但它并没有为我工作和MediaElement的将抛出一个“MF_MEDIA_ENGINE_ERR_SRC_NOT_SUPPORTED“例外的MediaFailed事件处理 我应该怎么办？

Answer 1

您还需要设置这些事件处理程序：

MediaControl.PlayPressed += MediaControl_PlayPressed; 
MediaControl.PausePressed += MediaControl_PausePressed; 
MediaControl.PlayPauseTogglePressed += MediaControl_PlayPauseTogglePressed; 
MediaControl.StopPressed += MediaControl_StopPressed; 

-

void MediaControl_StopPressed(object sender, object e) 
{ 
    myMediaPlayer.Stop(); 
} 

void MediaControl_PlayPauseTogglePressed(object sender, object e) 
{ 
} 

void MediaControl_PausePressed(object sender, object e) 
{ 
    myMediaPlayer.Pause(); 
} 

void MediaControl_PlayPressed(object sender, object e) 
{ 
    myMediaPlayer.Play(); 
} 

我认为，应该有它的工作。