Mediastore.Audio.Media.DATA什么都不返回

Question

我尝试用光标和内容解析器列出所有音频文件，我得到歌曲标题，歌曲和Id的艺术家，但问题是当我尝试在Toast中显示它时，我无法获得它没有返回的路径

感谢您的帮助。

以下是代码以及我如何获取歌曲：

ContentResolver musicResolver = this.getContentResolver();
    Uri musicUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; 
    Cursor musicCursor = musicResolver.query(musicUri,
            null,
            null,
            null,
            MediaStore.Audio.Media.TITLE + " ASC"); 



    if(musicCursor!=null && musicCursor.moveToFirst()){
        //get columns
        int idColumn = musicCursor.getColumnIndex(MediaStore.Audio.Media._ID);
        int titleColumn = musicCursor.getColumnIndex(MediaStore.Audio.Media.TITLE);
        int artistColumn = musicCursor.getColumnIndex(MediaStore.Audio.Media.ARTIST);
        int pathColumn = musicCursor.getColumnIndex(MediaStore.Audio.Media.DATA);

        //add songs to list
        do {
            long thisId = musicCursor.getLong(idColumn);
            String thisTitle = musicCursor.getString(titleColumn);
            String thisArtist = musicCursor.getString(artistColumn);
            String thisPath = musicCursor.getString(pathColumn);
            arrayChansons.add(new Chanson(thisId, thisTitle, thisArtist, thisPath));
        }
        while (musicCursor.moveToNext());
        musicCursor.close();