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有人可以告诉我如何指定以字节为单位读取音频文件的路径。我已经能够在列表视图中列出来自 sd 卡的歌曲。此外，我已将原始文件夹中存在的音频文件读入字节。但是我无法指定从列表视图中读取所选歌曲的路径。

以下是我的代码：

  String[] proj = {
                   MediaStore.Audio.Media._ID,
                   MediaStore.Audio.Media.DATA,
                   MediaStore.Audio.Media.DISPLAY_NAME,
                   MediaStore.Video.Media.SIZE 
                  };
            musiccursor = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,proj, null, null, null);
            count = musiccursor.getCount();
            musiclist = (ListView) findViewById(R.id.PhoneMusicList);
            musiclist.setAdapter(new MusicAdapter(getApplicationContext()));

            musiclist.setOnItemClickListener(musicgridlistener);
            mMediaPlayer = new MediaPlayer();

            //To read audio file in bytes
            InputStream in = getApplicationContext().getResources().openRawResource(R.raw.Audio);

            DataInputStream data = new DataInputStream(in);
            BufferedReader br = new BufferedReader(new InputStreamReader(data));
//Adapter
public View getView(int position, View convertView, ViewGroup parent) 
            {
                  System.gc();
                  TextView tv = new TextView(mContext.getApplicationContext());
                  String id = null;
                  if (convertView == null) 
                  {
                        music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME);
                        musiccursor.moveToPosition(position);

                        id = musiccursor.getString(music_column_index);
                        music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE);
                        musiccursor.moveToPosition(position);

                        id += " Size(KB):" + musiccursor.getString(music_column_index);
                        tv.setText(id);
                  } 
                  else
                        tv = (TextView) convertView;
                  return tv;
            }

在这里，我正在读取已放置在 raw 文件夹中的文件。但是，我需要阅读列表中已选择的音频文件，但我不知道如何引用它。

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