mapOverlays = mapView.getOverlays();
   drawable = this.getResources().getDrawable(R.drawable.icon);
   drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
   ((CoachItemizedOverlay)mapOverlays.get(0)).getItem(0).setMarker(drawable);

setMarker 메소드 안에 AnimationDrawable객체를  넣어주고 start를 시켰는데, 안되더라구요..
마커를 Animation 돌려주려면 어떻게 해야할까요?ㅠ