【Android】ListView convertView.getTag() 空指针

 

这两天在用自定义Adapter时 老是遇到convertView.getTag()  空指针异常

 

后来终于发现 忘了设置convertView.setTag(view);  

 

@Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        view = new ViewHolder();
        if (convertView == null) {
            convertView = inflater
                    .inflate(R.layout.activity_message_item, null);
            //do someting
            convertView.setTag(view);   
    } else {
            view = (ViewHolder) convertView.getTag();
            
        }
    // do something
}