1、在getview时，如果是一个textview，那么不用每次都new一个或者inflater直接返回，可以先判断convertview是否为空，如果为空则new或者inflate，否则直接返回convertview

2、如果adapter数量太多，假设需要显示1000个数据，那么如果在getview时每次都是对inflate，那么是一种对资源的浪费，且卡顿现象严重，此时可以通过结合viewHolder提高效率

 

举例：

1、adapter的getview方法

@Override    public View getView( int pos, View convertView, ViewGroup parent) {        // TODO Auto-generated method stub                    ViewHolderPushHistory holder;            final int position = pos;                        if(convertView == null)            {                                CommonUtils.LogWuwei(tag, "pushHistoryAdapter  getView position is "+pos);                                LayoutInflater inflater = (LayoutInflater)ctxt.getSystemService(Context.LAYOUT_INFLATER_SERVICE);                                holder = new ViewHolderPushHistory();                                convertView = inflater.inflate(R.layout.gridview_history_item, null);                                holder.tv_serinal_num = (TextView)convertView.findViewById(R.id.textview_grdiview_history_item_serinal_num);                                holder.tv_whether_packaged = (TextView)convertView.findViewById(R.id.textview_grdiview_history_item_whether_packaged);                                holder.buttonContent = (TextView)convertView.findViewById(R.id.button_gridview_history_item_order_content);                            holder.buttonTime = (TextView)convertView.findViewById(R.id.textview_grdiview_history_item_time);                                convertView.setTag(holder);            }            else            {                holder = (ViewHolderPushHistory)convertView.getTag();            }                                    holder.tv_serinal_num.setText(serinal_num);            holder.buttonContent.setText("鱼香肉丝");            holder.tv_whether_packaged.setText("打包");                                        holder.buttonTime.setText(“2：12”）;                                            return convertView;            }

 

2、定义一个存储信息的类

1 package com.shanfubaoAndroid.kitchenMealDone; 2  3  4 import android.widget.TextView; 5  6 public class ViewHolderPushHistory { 7      8      9     public TextView tv_serinal_num;10     11     public TextView tv_whether_packaged ;12     13     public TextView buttonContent ;14     15     public TextView buttonTime ;16     17 18 }