activity_main.xml代码如下：
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
android:layout_width="match_parent"
android:layout_height="45dp"
android:text="购物商城"
android:textSize="18sp"
android:textColor="#FFFFFF"
android:background="#FF8F03"
android:gravity="center"/>
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
list_item.xml代码如下：
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp">
android:id="@+id/iv"
android:layout_width="120dp"
android:layout_height="90dp"
android:layout_centerVertical="true" />
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:layout_toRightOf="@+id/iv">
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="桌子"
android:textColor="#000000"
android:textSize="20sp" />
android:id="@+id/tv_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/title"
android:layout_marginTop="10dp"
android:text="价格："
android:textColor="#FF8F03"
android:textSize="20sp" />
android:id="@+id/price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/title"
android:layout_marginTop="10dp"
android:layout_toRightOf="@+id/tv_price"
android:text="1000"
android:textColor="#FF8F03"
android:textSize="20sp" />
MainActivity.java代码如下：
package com.itcast.listview;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private ListView mListView;
//需要适配的数据
private String[] titles = { "桌子", "苹果", "蛋糕", "线衣", "猕猴桃",
"围巾"};
private String[] prices = { "1800元", "10元/kg", "300元", "350元", "10元/kg",
"280元"};
//图片集合
private int[] icons = {R.drawable.table,R.drawable.apple,R.drawable.cake,
R.drawable.wireclothes,R.drawable.kiwifruit,R.drawable.scarf};
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化ListView控件
mListView = (ListView) findViewById(R.id.lv);
//创建一个Adapter的实例
MyBaseAdapter mAdapter = new MyBaseAdapter();
//设置Adapter
mListView.setAdapter(mAdapter);
}
//创建一个类继承BaseAdapter
class MyBaseAdapter extends BaseAdapter {
//得到item的总数
@Override
public int getCount() {
//返回ListView Item条目的总数
return titles.length;
}
//得到Item代表的对象
@Override
public Object getItem(int position) {
//返回ListView Item条目代表的对象
return titles[position];
}
//得到Item的id
@Override
public long getItemId(int position) {
//返回ListView Item的id
return position;
}
//得到Item的View视图
@Override
public View getView(int position, View convertView, ViewGroup parent) {
/* //将list_item.xml文件找出来并转换成View对象
View view = View.inflate(MainActivity.this,
R.layout.list_item, null);
//找到list_item.xml中创建的TextView
TextView title = (TextView) view.findViewById(R.id.title);
TextView price = (TextView) view.findViewById(R.id.price);
ImageView iv = (ImageView) view.findViewById(R.id.iv);
title.setText(titles[position]);
price.setText(prices[position]);
iv.setBackgroundResource(icons[position]);
return view;*/
ViewHolder holder = null;
if(convertView == null){
//将list_item.xml文件找出来并转换成View对象
convertView = View.inflate(MainActivity.this, R.layout.list_item, null);
//找到list_item.xml中创建的TextView
holder = new ViewHolder();
holder.title = (TextView) convertView.findViewById(R.id.title);
holder.price = (TextView) convertView.findViewById(R.id.price);
holder.iv = (ImageView) convertView.findViewById(R.id.iv);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
holder.title.setText(titles[position]);
holder.price.setText(prices[position]);
holder.iv.setBackgroundResource(icons[position]);
return convertView;
}
}
static class ViewHolder{
TextView title;
TextView price;
ImageView iv;
}
}
实现效果如下：
标签：TextView,基础教程,position,Android,View,holder,id,商城,convertView
来源： /m0_46412771/article/details/105865984
