Need Android equivalent of AudioInputStream

I'm trying to write an Android app that analyzes content from the user's mu开发者_如何学JAVAsic library. Let's assume that these are mp3 files on the SD drive, for starters. I'm able to find Java algorithms to analyze music files, but I can't find an API to read and decode the files (not play them. There's an API to play the files, and even classes for audio effects, but I don't see any way for an app to get to the decoded data from a music file. I can read from microphone.

J2SE has a class AudoInputStream,but it's not part of Android. Any suggestions?

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My real purpose was to be able to look at the files in my android music library and classify them by tempo. I was looking for libraries to help with this, but I came across a service called Echo Nest that worked fine from my Android for calculating BPM on mp3 files.