Song实体类

/**
 * Created by Harris on 2016/7/31.
 */

/**
 *
 * @ClassName: com.example.mediastore.Song
 * @Description: 歌曲实体类
 * @author zhaokaiqiang
 * @date 2014-12-4 上午11:49:59
 *
 */
public class Song {

    private String fileName;
    private String title;
    private int duration;
    private String singer;
    private String album;
    private String year;
    private String type;
    private String size;
    private String fileUrl;

    public String getFileName() {
        return fileName;
    }

    public void setFileName(String fileName) {
        this.fileName = fileName;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public int getDuration() {
        return duration;
    }

    public void setDuration(int duration) {
        this.duration = duration;
    }

    public String getSinger() {
        return singer;
    }

    public void setSinger(String singer) {
        this.singer = singer;
    }

    public String getAlbum() {
        return album;
    }

    public void setAlbum(String album) {
        this.album = album;
    }

    public String getYear() {
        return year;
    }

    public void setYear(String year) {
        this.year = year;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getSize() {
        return size;
    }

    public void setSize(String size) {
        this.size = size;
    }

    public String getFileUrl() {
        return fileUrl;
    }

    public void setFileUrl(String fileUrl) {
        this.fileUrl = fileUrl;
    }

    public Song() {
        super();
    }

    public Song(String fileName, String title, int duration, String singer,
                String album, String year, String type, String size, String fileUrl) {
        super();
        this.fileName = fileName;
        this.title = title;
        this.duration = duration;
        this.singer = singer;
        this.album = album;
        this.year = year;
        this.type = type;
        this.size = size;
        this.fileUrl = fileUrl;
    }

    @Override
    public String toString() {
        return "Song [fileName=" + fileName + ", title=" + title
                + ", duration=" + duration + ", singer=" + singer + ", album="
                + album + ", year=" + year + ", type=" + type + ", size="
                + size + ", fileUrl=" + fileUrl + "]";
    }

}

获取sd卡所有的音乐文件

import android.content.Context;
import android.database.Cursor;
import android.provider.MediaStore;

import com.me.harris.ganstuff.model.Song;

import java.util.ArrayList;

/**
 *
 * @ClassName: com.example.mediastore.AudioUtils
 * @Description: 只是一个用来获取手机上所有音乐文件的帮助类
 * @author zhaokaiqiang
 * @date 2014-12-4 上午11:39:45
 *
 */
public class AudioUtils {

    /**
     * 获取sd卡所有的音乐文件
     *
     * @return
     * @throws Exception
     */
    public static ArrayList<Song> getAllSongs(Context context) {

        ArrayList<Song> songs = null;

        Cursor cursor = context.getContentResolver().query(
                MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
                new String[] { MediaStore.Audio.Media._ID,
                        MediaStore.Audio.Media.DISPLAY_NAME,
                        MediaStore.Audio.Media.TITLE,
                        MediaStore.Audio.Media.DURATION,
                        MediaStore.Audio.Media.ARTIST,
                        MediaStore.Audio.Media.ALBUM,
                        MediaStore.Audio.Media.YEAR,
                        MediaStore.Audio.Media.MIME_TYPE,
                        MediaStore.Audio.Media.SIZE,
                        MediaStore.Audio.Media.DATA },
                MediaStore.Audio.Media.MIME_TYPE + "=? or "
                        + MediaStore.Audio.Media.MIME_TYPE + "=?",
                new String[] { "audio/mpeg", "audio/x-ms-wma" }, null);

        songs = new ArrayList<Song>();

        if (cursor.moveToFirst()) {

            Song song = null;

            do {
                song = new Song();
                // 文件名
                song.setFileName(cursor.getString(1));
                // 歌曲名
                song.setTitle(cursor.getString(2));
                // 时长
                song.setDuration(cursor.getInt(3));
                // 歌手名
                song.setSinger(cursor.getString(4));
                // 专辑名
                song.setAlbum(cursor.getString(5));
                // 年代
                if (cursor.getString(6) != null) {
                    song.setYear(cursor.getString(6));
                } else {
                    song.setYear("未知");
                }
                // 歌曲格式
                if ("audio/mpeg".equals(cursor.getString(7).trim())) {
                    song.setType("mp3");
                } else if ("audio/x-ms-wma".equals(cursor.getString(7).trim())) {
                    song.setType("wma");
                }
                // 文件大小
                if (cursor.getString(8) != null) {
                    float size = cursor.getInt(8) / 1024f / 1024f;
                    song.setSize((size + "").substring(0, 4) + "M");
                } else {
                    song.setSize("未知");
                }
                // 文件路径
                if (cursor.getString(9) != null) {
                    song.setFileUrl(cursor.getString(9));
                }
                songs.add(song);
            } while (cursor.moveToNext());

            cursor.close();

        }
        return songs;
    }

}