How to play a mp3 file directly.

[JohnnySung]

I don't need SoundService, I just want to play a mp3 file from a path.
I don't know how to play. so I build a project, in my main activity, when I click the button, I try to write a program in this way:

Track track;
File tmpFile;
public void btnPlayClicked(View v) {// I can break and step the following program.
track=new Track(this,null);//just guess
track.setDataSourceString(tmpFile.getAbsolutePath());
// track.prepare();//fail so comment out.
track.start();
track.decode();//no thing happen
}

Can you tell me how to do?

[PaulWoitaschek]

I guess the tmpFile does not exist?
after setDataSource and prepare start should work. Whats the exception that was thrown?