Android多媒体分析-通过MediaStore获取Audio信息

public void getAlldata() {  
        ContentResolver cr = getApplication().getContentResolver();  
        if (cr == null) {  
            return;  
        }  
        // 获取所有歌曲  
        Cursor cursor = cr.query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,  
                null, null, null, MediaStore.Audio.Media.DEFAULT_SORT_ORDER);  
        if (null == cursor) {  
            return;  
        }  
        Music music;  
        List<Music> list = new ArrayList<MainActivity.Music>();  
        if (cursor.moveToFirst()) {  
            do {  
                  
                //歌曲名  
                String title = cursor.getString(cursor  
                        .getColumnIndex(MediaStore.Audio.Media.TITLE));  
                  
                //歌手  
                String singer = cursor.getString(cursor  
                        .getColumnIndex(MediaStore.Audio.Media.ARTIST));  
                  
                //专辑  
                String album = cursor.getString(cursor  
                        .getColumnIndex(MediaStore.Audio.Media.ALBUM));  
                  
                //长度  
                long size = cursor.getLong(cursor  
                        .getColumnIndex(MediaStore.Audio.Media.SIZE));  
                  
                //时长  
                int duration = cursor.getInt(cursor  
                        .getColumnIndex(MediaStore.Audio.Media.DURATION));  
                  
                //路径  
                String url = cursor.getString(cursor  
                        .getColumnIndex(MediaStore.Audio.Media.DATA));  
                  
                //显示的文件名  
                String _display_name = cursor.getString(cursor  
                        .getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));  
                  
                //类型  
                String mime_type = cursor.getString(cursor  
                        .getColumnIndex(MediaStore.Audio.Media.MIME_TYPE));  
                music = new Music();  
                music.setAlbum(album);  
                music.setDuration(duration);  
                music.setSinger(singer);  
                music.setSize(size);  
                music.setTitle(title);  
                music.setUrl(url);  
                music.set_display_name(_display_name);  
                music.setMime_type(mime_type);  
                list.add(music);  
            } while (cursor.moveToNext());  
        }  
        System.out.println(list.size());  
    }  
    class Music  
    {  
        private  String title;  
        private  String singer;  
        private  String album;  
        private  long size;  
        private  int duration;  
        private  String url;  
        private  String _display_name;  
        private String mime_type;  
          
        public String get_display_name() {  
            return _display_name;  
        }  
        public void set_display_name(String _display_name) {  
            this._display_name = _display_name;  
        }  
        public String getMime_type() {  
            return mime_type;  
        }  
        public void setMime_type(String mime_type) {  
            this.mime_type = mime_type;  
        }  
        public String getTitle() {  
            return title;  
        }  
        public void setTitle(String title) {  
            this.title = title;  
        }  
        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 long getSize() {  
            return size;  
        }  
        public void setSize(long size) {  
            this.size = size;  
        }  
        public int getDuration() {  
            return duration;  
        }  
        public void setDuration(int duration) {  
            this.duration = duration;  
        }  
        public String getUrl() {  
            return url;  
        }  
        public void setUrl(String url) {  
            this.url = url;  
        }  
        @Override  
        public String toString() {  
            return "Music [title=" + title + ", singer=" + singer + ", album="  
                    + album + ", size=" + size + ", duration=" + duration  
                    + ", url=" + url + ", _display_name=" + _display_name  
                    + ", mime_type=" + mime_type + "]";  
        }  
          
    }