android listview 加图片和文字有关问题

    private ArrayList<String> commentNickname = null;
    private ArrayList<String> sightComment = null;
    private ArrayList<Bitmap> commentImage = null;

ArrayList<HashMap<String, Object>> commentList = new ArrayList<HashMap<String, Object>>();
        HashMap<String, Object> map= null;
        while(i<commentCount){
            map= new HashMap<String, Object>();
            map.put("picture", commentImage.get(i));
            map.put("commentnickname",commentNickname.get(i));
            map.put("sightComment", sightComment.get(i));
            commentList.add(map);
            i++;
        }
        SightAdapter listAdapter = new SightAdapter(this, commentList, R.layout.sightcommentlistview,  
                new String[] { "commentnickname", "sightComment","picture"}, 
                new int[] { R.id.LVuserNameCO,R.id.LVsightComment,R.id.LVimageView});
        setListAdapter(listAdapter);