public void updateSongList(){
     
     Music[] music = new Music[10];
     int cnt = 0;
     
     Resources r = getResources();
     BitmapDrawable mDefaultAlbumIcon = (BitmapDrawable)r.getDrawable(R.drawable.icon);
     
     String[] mCursorCols = new String[]{
      MediaStore.Audio.Media._ID,
      MediaStore.Audio.Media.ARTIST,
      MediaStore.Audio.Media.TITLE,
      MediaStore.Audio.Media.ALBUM
     };
     
     Cursor cur = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, mCursorCols, null, null, null);
     
     if( cur.isFirst()){      
      
      String title, artist, album;
      Drawable d;
      
      int titleColumn = cur.getColumnIndex(MediaStore.Audio.Media.TITLE);  
      int artistColumn = cur.getColumnIndex(MediaStore.Audio.Media.ARTIST); 
      int albumColumn = cur.getColumnIndex(MediaStore.Audio.Media.ALBUM); 
      
      
      do{
       title = cur.getString(titleColumn);
       artist = cur.getString(artistColumn);
       album = cur.getString(albumColumn);
       
       d = MusicUtils.getCachedArtwork(this, cnt+1, mDefaultAlbumIcon);
 
       music[cnt] = new Music(artist, title, album, d);
       songs.add(music[cnt]);
       cnt++;
      }while(cur.moveToNext());      
     }
    
     MusicInformation songList = new MusicInformation(this, R.layout.musictr_row, songs);      
  setListAdapter(songList);
  listview.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);     
    }

08-20 01:12:52.356: ERROR/AndroidRuntime(3153): Uncaught handler: thread main exiting due to uncaught exception
08-20 01:12:52.403: ERROR/AndroidRuntime(3153): java.lang.RuntimeException: Unable to start activity ComponentInfo{kr.or.mp3/kr.or.mp3.Musictrack}: java.lang.NullPointerException
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2497)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2513)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at android.app.ActivityThread.access$2200(ActivityThread.java:119)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1864)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at android.os.Looper.loop(Looper.java:123)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at android.app.ActivityThread.main(ActivityThread.java:4364)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at java.lang.reflect.Method.invokeNative(Native Method)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at java.lang.reflect.Method.invoke(Method.java:521)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at dalvik.system.NativeStart.main(Native Method)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153): Caused by: java.lang.NullPointerException
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at kr.or.mp3.Musictrack.updateSongList(MusicTR.java:78)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at kr.or.mp3.MusictrackonCreate(MusicTR.java:50)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2460)
08-20 01:12:52.403: ERROR/AndroidRuntime(3153):     ... 11 more

예제를 퍼와서 돌려보는중에 에뮬에서는 작동이 원만하게 잘되는대요
실제 단말기에 올렸을때는 저기 update 부분부터 에러가 나서 더이상 넘어가지가 않내요

여러가지 찾아본결과 쿼리가 문제 인거 같은데요 ... 해결법을 모르겠내요 혹시나 아시는분있으 시면
금쪽같은 시간좀 내주세요 ^^