在windows8 Developer预览版中,我们可以使用此代码在后台播放音频:
mediaElement.AudioCategory = AudioCategory.Media;
在windows8客户视图中,似乎我们应该使用AudioCategory.BackgroundCapableMedia而不是AudioCategory.Media
mediaElement.AudioCategory=AudioCategory.BackgroundCapableMedia;
我还在appxmanifest中声明了一个后台任务
<Extension Category="windows.backgroundTasks" EntryPoint="TestApp.App">
<BackgroundTasks>
<Task Type="audio" />
</BackgroundTasks>
</Extension>
但它对我不起作用,MediaElement将在MediaFailed EventHandler中抛出“MF_MEDIA_ENGINE_ERR_SRC_NOT_SUPPORTED”异常 我该怎么办?
答案 0 :(得分:3)
您还需要设置这些事件处理程序:
using Windows.Media;
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();
}
我认为应该让它发挥作用。