使用BackgroundCapableMedia在后台播放音频

本文介绍了使用BackgroundCapableMedia在后台播放音频的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在Windows8开发人员预览版中，我们可以使用以下代码在后台播放音频:

In the windows8 Developer preview we can use this code to play audio in background:

mediaElement.AudioCategory = AudioCategory.Media;

在Windows8客户视野中，似乎我们应该使用AudioCategory.BackgroundCapableMedia而不是AudioCategory.Media

In the windows8 Customer perview, It seems that we should use AudioCategory.BackgroundCapableMedia instead of AudioCategory.Media

mediaElement.AudioCategory=AudioCategory.BackgroundCapableMedia;

我还声明了appxmanifest中的后台任务

and I also Declare a background task in appxmanifest

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

但是它对我不起作用，MediaElement将在MediaFailed EventHandler中引发"MF_MEDIA_ENGINE_ERR_SRC_NOT_SUPPORTED"异常 我该怎么办?

but it didn't work for me and the MediaElement will throw an "MF_MEDIA_ENGINE_ERR_SRC_NOT_SUPPORTED" exception in MediaFailed EventHandler How should I do?

推荐答案

您还需要设置以下事件处理程序:

You also need to set up these event handlers:

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(); }

我认为应该起作用.