如何使用MediaStore.Audio.Media.ALBUM_ART

Question

我正在尝试制作一个MusicPlayer应用程序。我想使用内容解析器显示AlbumArt。

以下是我用于获取歌曲信息的ContentResolver。

 public void getSongList(){
        ContentResolver musicResolver = getActivity().getContentResolver();
        Uri musicUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
        Cursor musicCursor = musicResolver.query(musicUri , null , null , null , null);
        if(musicCursor!=null && musicCursor.moveToFirst()){
            //get columns
            int titleColumn = musicCursor.getColumnIndex
                    (android.provider.MediaStore.Audio.Media.TITLE);
            int idColumn = musicCursor.getColumnIndex
                    (android.provider.MediaStore.Audio.Media._ID);
            int artistColumn = musicCursor.getColumnIndex
                    (android.provider.MediaStore.Audio.Media.ARTIST);
            int albumart = musicCursor.getColumnIndex
                    (android.provider.MediaStore.Audio.Albums.ALBUM_ART);
            //add songs to list
            do {
                long thisId = musicCursor.getLong(idColumn);
                String thisTitle = musicCursor.getString(titleColumn);
                String thisArtist = musicCursor.getString(artistColumn);
                int thisAlbumArt = musicCursor.getInt(albumart);
                songList.add(new Song(thisId, thisTitle, thisArtist , thisAlbumArt));
            }
            while (musicCursor.moveToNext());
        }
    }

这是我的自定义getView方法，用于在Listview中显示视图（歌曲信息的图像和文本）。

   @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        //map to song layout
        LinearLayout songLay = (LinearLayout)songInf.inflate
                (R.layout.songviewer, parent, false);
        //get title and artist views
        TextView songView = (TextView)songLay.findViewById(R.id.song_title);
        TextView artistView = (TextView)songLay.findViewById(R.id.song_artist);
        ImageView albumArtView = (ImageView)songLay.findViewById(R.id.albumArtSongs);
        //get song using position
        Song currSong = songs.get(position);
        //get title and artist strings
        songView.setText(currSong.getTitle());
        artistView.setText(currSong.getArtist());
        albumArtView.setImageResource(currSong.getAlbumArt());
        //set position as tag
        songLay.setTag(position);
        return songLay;
    }

每当我尝试运行应用程序时，应用程序都会崩溃。

我只是想知道如何使用ContentResolver和上面提到的代码显示关于其歌曲的正确歌曲艺术。

谢谢。