android獲取音樂文件的內置專輯圖片

代碼和注釋如下：

private Cursor getCursor(String filePath) {    
      String path = null;    
      Cursor c = getContentResolver().query(    
              MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null,    
              MediaStore.Audio.Media.DEFAULT_SORT_ORDER);    
      // System.out.println(c.getString(c.getColumnIndex("_data")));    
      if (c.moveToFirst()) {    
          do {    
              // 通過Cursor 獲取路徑，如果路徑相同則break；   
           System.out.println("////////"+filePath);  
              path = c.getString(c    
                      .getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));   
             System.out.println("?????????"+path);  
              // 查找到相同的路徑則返回，此時cursorPosition 便是指向路徑所指向的Cursor 便可以返

回了    
              if (path.equals(filePath)) {    
                  // System.out.println("audioPath = " + path);    
                  // System.out.println("filePath = " + filePath);    
                 // cursorPosition = c.getPosition();  
               break;  
              }    
          } while (c.moveToNext());    
      }    
      // 這兩個沒有什麼作用，調試的時候用    
      // String audioPath = c.getString(c    
      // .getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));    
      //    
      // System.out.println("audioPath = " + audioPath);    
      return c;    
  }   
       
     private String getAlbumArt(int album_id) {    
          String mUriAlbums = "content://media/external/audio/albums";    
          String[] projection = new String[] { "album_art" };    
          Cursor cur = this.getContentResolver().query(    
                  Uri.parse(mUriAlbums + "/" + Integer.toString(album_id)),    
                  projection, null, null, null);    
         String album_art = null;    
          if (cur.getCount() > 0 && cur.getColumnCount() > 0) {    
              cur.moveToNext();    
              album_art = cur.getString(0);    
          }    
          cur.close();    
          cur = null;    
          return album_art;    
      }   
     private void getImage(){  
      Cursor currentCursor = getCursor("/mnt/sdcard/"+mp3Info);  
   int album_id = currentCursor.getInt(currentCursor    
                  .getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM_ID));   
      String albumArt = getAlbumArt(album_id);  
      Bitmap bm = null;  
      if (albumArt == null) {    
       mImageView.setBackgroundResource(R.drawable.staring);    
      } else {    
          bm = BitmapFactory.decodeFile(albumArt);    
          BitmapDrawable bmpDraw = new BitmapDrawable(bm);    
          mImageView.setImageDrawable(bmpDraw);    
      }   
     }