This handles audio tracks on Android devices.

AudioSample.java

import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by jmatsu on 2014/10/21.
 */
public class AudioSample {
    private AudioSample(){}
  
    private static final String[] COLUMNS = {
            MediaStore.Audio.Media._ID,
            MediaStore.Audio.Media.DATA,
            MediaStore.Audio.Media.TITLE,
            MediaStore.Audio.Media.ALBUM,
            MediaStore.Audio.Media.ARTIST,
            MediaStore.Audio.Media.ALBUM_ID,
            MediaStore.Audio.Media.ARTIST_ID,
            MediaStore.Audio.Media.DURATION,
            MediaStore.Audio.Media.TRACK,
    };

    public static List<Track> getTracks(Context activity) {

        List tracks = new ArrayList();
        ContentResolver resolver = activity.getContentResolver();
        Cursor cursor = resolver.query(
                MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
                COLUMNS,
                null,
                null,
                null
        );
        while (cursor.moveToNext()) {
            if (cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION)) < 3000) {
                continue;
            }
            tracks.add(new Track(cursor));
        }
        cursor.close();
        return tracks;
    }

    public static class Track {
        public long id; // unique id from content provider
        public long albumId; // album id from content provider
        public long artistId; // artist id of the album from content provider
        public String path; // file path
        public String title; // the title of the track
        public String album; // the title of the album
        public String artist; // the name of the artist
        public Uri uri; // uri
        public long duration; // playing duration
        public int trackNo; // track number (not id)

        Track(Cursor cursor) {
            id = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media._ID));
            path = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
            title = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE));
            album = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM));
            artist = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
            albumId = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));
            artistId = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST_ID));
            duration = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION));
            trackNo = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.TRACK));
            uri = ContentUris.withAppendedId(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, id);
        }
    }
}