[Android] Adapter붙일때 getView처리방식

가장 일반적인 방식.. 책에서 예제로 쓰이고.. 대부분 뭐 이방법으로 쓴다..

<일반적인방법>
            View MyView = convertView;  

            
            if (MyView == null) {
                LayoutInflater vi = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                MyView = vi.inflate(R.layout.musiclist, null);
            }
            ImageView iv = (ImageView) MyView.findViewById(R.id.album_img);
           
            Bitmap albumArt = MusicList.getBitmapImage(mContext, Integer.parseInt((mAlbumartIDList.get(position))), 70, 70);
            iv.setImageBitmap(albumArt);
             
            TextView tv = (TextView) MyView.findViewById(R.id.musiclist_title);
            tv.setText(mMusiceTitleList.get(position));
            
            TextView tv1 = (TextView) MyView.findViewById(R.id.musiclist_artist);
            tv1.setText(mSingerList.get(position));
              
            return MyView;

그리고 이 방법은 이것저것 검색해보다가 찾은건데.. 불필요한 호출을 방지하여 view의 호출이 빠르게 일어난다고 한다..
근데.. 잘 모르겠음 ㅋㅋ
<빠른호출법>  
   View v = convertView;
   ViewHolder holder;
   if(v == null) {
    holder = new ViewHolder();
    
    
    LayoutInflater vi = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                v = vi.inflate(R.layout.musiclist, null);
    holder.album_iv = (ImageView) v.findViewById(R.id.album_img);
    holder.playing_iv = (ImageView)v.findViewById(R.id.current_playing_img);
    
    holder.title_tv = (TextView) v.findViewById(R.id.musiclist_title);
    holder.artist_tv = (TextView) v.findViewById(R.id.musiclist_artist);
 
 
    v.setTag(holder);
   }
   else {
    holder = (ViewHolder) v.getTag();
   }

    Bitmap albumArt = MusicList.getBitmapImage(mContext, Integer.parseInt((mAlbumartIDList.get(position))), 70, 70);
    holder.album_iv.setImageBitmap(albumArt);
    holder.title_tv.setText(mMusiceTitleList.get(position));
    holder.artist_tv.setText(mSingerList.get(position));

      
      return v;