Android：MediaPlayer，如何获取音频流的属性？
我可以使用 MediaPlayer 界面成功收听音频流，但如何获取流的属性，例如当前比特率或流文本（许多流（例如在线收音机）包括当前播放的曲目）？
我试图找到这些信息，但找不到，如果这些东西可能存在，那么 android 开发网站上是否有一个列表，其中列出了各种可用的“属性”？
I can successfully listen to an audio stream with the MediaPlayer interface, but how can I get properties of the stream like the current bit rate, or the stream text (lots of streams like on line radios include the currently playing track)?
I tried to find this information but couldn't, if these things are possibly is there a list somewhere on the android dev site where the various available 'properties' are listed?
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首先，Android DEV 站点包含所有类信息 - 但有时很难找到您需要的信息。在这种情况下，检查该类的 java 源代码会非常有帮助。
快速查看 SDK，可以发现有一个
onInfoListener接口，您可以在扩展MediaPlayer的类中实现该接口。这需要您实现public boolean onInfo(MediaPlayer mp, int what, int extra)。http://developer.android.com/reference/android/media/MediaPlayer .OnInfoListener.html 指出有一个what=
MEDIA_INFO_METADATA_UPDATE。但是 - 检查谷歌会给出这样的想法：这永远不会被调用：-/
所以最终你只能靠自己了……
First, the Android DEV site is the site with all class information - but sometimes hard to find what you need. In that case, checking the java source of the class can be quite helpful.
From a quick look into the SDK, there is an
onInfoListenerinterface, which you can implement in a class extendingMediaPlayer. That needs you to havepublic boolean onInfo(MediaPlayer mp, int what, int extra)implemented.http://developer.android.com/reference/android/media/MediaPlayer.OnInfoListener.html states there is a what=
MEDIA_INFO_METADATA_UPDATE.But - checking google for that would give the idea that this never gets called :-/
So eventually you are on your own with that...
我可能会让这比需要的更难，但是您可以使用 Jlayer 解码流的帧 或其他一些 MP3 解码库来获取您正在寻找的信息。不确定是否有办法仅使用 Android sdk 来做到这一点。
I could be making this harder than it needs to be, but you can decode a frame of the Stream with Jlayer or some other MP3 decoding library to get the info you are looking for. Not sure if there is a way to do this with just the Android sdk.
如果您的流是shoutcast/icecast流，那么您可以使用 http://code.google 上的实用程序类.com/p/streamscraper/ 提取包括歌曲标题在内的元数据。
或者，您可以构建自己的元数据提取器。看看 http://www.smackfu.com/stuff/programming/shoutcast.html 了解更多信息。
If your stream is a shoutcast/icecast stream then you can use the utility class at http://code.google.com/p/streamscraper/ to extract the metadata including the song title.
Alternatively, you can build your own metadata extractor. Take a look at http://www.smackfu.com/stuff/programming/shoutcast.html for more info.