android listview中如何配对BaseAdapter

最新推荐文章于 2021-05-27 08:52:07 发布

abbiz

最新推荐文章于 2021-05-27 08:52:07 发布

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本文链接：https://blog.youkuaiyun.com/abbiz/article/details/82879853

本文介绍如何使用Java实现自定义适配器（MyListAdapter）来配置ListView的显示，包括获取项数、获取单个数据项、设置项ID和通过适配器展示数据。

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   public class MyListAdapter extends BaseAdapter
    {
        private LayoutInflater mInflater;

        public MyListAdapter(Context context)
        {
            this.mInflater = LayoutInflater.from(context);
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return (listItem == null)?0:listItem.size();// 4;// (persons==null)?0:persons.size();
        }

        @Override
        public Object getItem(int arg0) {
            // TODO Auto-generated method stub
            return (listItem == null)?null:listItem.get(arg0);//arg0;//
        }

        @Override
        public long getItemId(int arg0) {
            // TODO Auto-generated method stub
            return arg0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // TODO Auto-generated method stub
            ViewHolder holder = null;
            if(convertView == null)
            {
                convertView = mInflater.inflate(R.layout.list_item, null);
                holder = new ViewHolder();
                holder.mMyEdit = (CalculatorEditText)convertView.findViewById(R.id.expEditTextId);
                holder.mMyEdit1 = (CalculatorEditText)convertView.findViewById(R.id.resEditTextId);
                convertView.setTag(holder);
            }else
            {
                holder = (ViewHolder)convertView.getTag();
            }

            holder.mMyEdit.setText((String)listItem.get(position).get("expEditTextId").toString());
            holder.mMyEdit1.setText((String)listItem.get(position).get("resEditTextId").toString());

            return convertView;
        }
    }

    public final class ViewHolder
    {
        public CalculatorEditText mMyEdit;
        public CalculatorEditText mMyEdit1;
    }