关于这个花了好一个晚上的时间最后还是没有解决，个人觉得应该没有什么问题可是就是有问题..
贴上源码：
- Java code
class CommentAdapter extends BaseAdapter{ public CommentAdapter(){ Log.d("Infor", comment_list.size()+""); } @Override public int getCount() { // TODO Auto-generated method stub return comment_list.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return comment_list.get(position); } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View arg1, ViewGroup arg2) { // TODO Auto-generated method stub LayoutInflater layoutInflater = LayoutInflater.from(Comment.this);//从当前上下文得到LayoutInflater rowView = rowViews.get(position); if(rowView!=null){ rowView=layoutInflater.inflate(R.layout.comment_item, null); TextView comment_name = (TextView) rowView.findViewById(R.id.comment_item_name); TextView comment_time = (TextView) rowView.findViewById(R.id.comment_item_time); TextView comment_text = (TextView) rowView.findViewById(R.id.comment_item_text); comment_name.setText(comment_list.get(position).get("comment_user_name")); comment_time.setText(comment_list.get(position).get("create_time")); comment_text.setText(comment_list.get(position).get("comment_text")); rowViews.put(position, rowView); } return rowView; } }- Java code
CommentAdapter adapter=new CommentAdapter(); comment_listview.setAdapter(adapter);
其中CommentAdapter是个内部类，comment_list是个列表List<Map>该值验证确认无误的...
可是最后列表根本就没有显示出来，还报空指针异常。我就纳闷了，没有空指针啊，comment_list什么的都获得布局里的对象了的。大家帮忙看下，感谢...
------解决方案--------------------
rowViews是什么东东，没看到实例化啊，而且这个地方为什么要这么写？listView本身就有缓存，为什么好用rowViews来缓存？
------解决方案--------------------
getView里面要改：
if (arg1 == null)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
arg1 = inflater.inflate(R.layout.comment_item, parent, false);
}
TextView comment_name = (TextView) arg1.findViewById(R.id.comment_item_name);
TextView comment_time = (TextView) arg1.findViewById(R.id.comment_item_time);
TextView comment_text = (TextView) arg1.findViewById(R.id.comment_item_text);
comment_name.setText(comment_list.get(position).get("comment_user_name"));
comment_time.setText(comment_list.get(position).get("create_time"));
comment_text.setText(comment_list.get(position).get("comment_text"));
return arg1;
------解决方案--------------------
楼主你的adapter里面没有list数据的，所以不会显示，在构造方法中，传一个list
------解决方案--------------------
@Override
public View getView(int position, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
LayoutInflater layoutInflater = LayoutInflater.from(Comment.this);//从当前上下文得到LayoutInflater
if(rowView==null){
rowView=layoutInflater.inflate(R.layout.comment_item, null);
}
//rowView = rowViews.get(position);
// if(rowView!=null){