WP7背景音乐资源不再可用 [英] WP7 background audio resources are no longer available

问题描述

我用 BackgroundAudioPlayer 我的Windows Phone 7的音乐和放大器;视频应用。我玩一些音乐后，我用 MediaPlayerLauncher 播放视频，那么preSS返回，返回到我的应用程序。还有，每当我用 BackgroundAudioPlayer.Instance 。我收到错误的背景音乐资源不再可用

I'm using BackgroundAudioPlayer for my Windows Phone 7 music & video application. After I play some music, I play video using MediaPlayerLauncher, then press Back to return to my app. There whenever I use BackgroundAudioPlayer.Instance. I receive error "The background audio resources are no longer available".

<一个href=\"http://social.msdn.microsoft.com/Forums/en-US/wpdevelop/thread/f1272e7c-e138-4d95-9ee2-0fb08309d2f4/\"相对=nofollow>在MSDN上有人建议使用try / catch语句，但是这不是一个好主意，可以减缓应用程序。

Someone on MSDN suggests using try/catch, but this is not a good idea, and can slow down the app.

其他建议调用 BackgroundAudioPlayer.Instance.Close（）推出前的MediaPlayer 。然而，当我播放音乐，代理负载为.dll再次，这需要很多时间。

Other suggests call BackgroundAudioPlayer.Instance.Close() before launch MediaPlayer. However, when I play music, the agent load .dll again, which takes very much time.

如何解决这一问题？

推荐答案

如果您在音频后播放视频的OS肯定会终止的背景音乐播放器。从你的问题看来这是这将证实这一点的时候可重复的100％。你唯一的选择是重新启动该后台音频播放器在调用 BackgroundAudioPlayer.Instance.Close（），然后发挥你的视频了。哪像你说的，需要重新加载您的播放器的DLL当您启动BAP。

If you play a video after your audio the OS will definitely "terminate" your Background Audio Player. From your question it seems this is reproducible 100% of the time which would confirm this. Your only option is to restart the background audio player again after you have called BackgroundAudioPlayer.Instance.Close(), and then played your video. Which as you said will require reloading your player DLL when you start the BAP.

更新从评论跟进

如果你没有实现流式音频剂，但只有一个AudioPlayer剂没有一个过程，你反正杀。操作系统旋转起来的过程作为与时，它需要得到你处理一个动作（例如：用户的动作，跟踪结束，关闭）。

If you aren't implementing a streaming audio agent but only an AudioPlayer agent there isn't a process for you to kill anyway. The OS spins up a process as and when it needs to get you to process an action (e.g.: user action, track ended, shutdown).

BackgroundAudioPlayer.Instance.Close（）只是确保该操作系统干净释放这些资源的情况下，如OP了。

BackgroundAudioPlayer.Instance.Close() just makes sure that the OS releases those resources cleanly in a scenario such as the OP has.

要重新启动背景音乐，只需拨打 BackgroundAudioPlayer.Instance.Play（）试。

To restart background audio, just call BackgroundAudioPlayer.Instance.Play() again.

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