Android 完整购物商城界面的实现案例

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">
 
    <TextView
        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"/>
 
    <ListView
        android:id="@ id/lv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:listSelector="@color/colorAccent" />
 
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp">
    <ImageView
        android:id="@ id/iv"
        android:layout_width="120dp"
        android:layout_height="90dp"
        android:layout_centerVertical="true" />
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginLeft="10dp"
        android:layout_toRightOf="@ id/iv">
        <TextView
            android:id="@ id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="桌子"
            android:textColor="#000000"
            android:textSize="20sp" />
        <TextView
            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" />
        <TextView
            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" />
    </RelativeLayout>
</RelativeLayout>

package com.example.dymemory1;
 
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;
    private  String[] titles = {"苹果","蛋糕","修罗壁纸","桌子","猕猴桃","毛衣"};
    private  String[] prices = {"10元/kg","100元/个","50元/张","45元/把","10元/kg","110元/件"};
 
    private int[] icons = {R.drawable.apple,R.drawable.cake,R.drawable.juyoujing,R.drawable.table,R.drawable.kiwifruit,R.drawable.wireclothes};
 
    protected  void onCreate(Bundle saveInstanceState){
        super.onCreate(saveInstanceState);
        setContentView(R.layout.activity_main);
 
        mListView=(ListView)findViewById(R.id.lv);
 
        MyBaseAdaPter mAdapter = new MyBaseAdaPter();
 
        mListView.setAdapter(mAdapter);
    }
    class MyBaseAdaPter extends  BaseAdapter{
        @Override
        public int getCount( ){
            return  titles.length;
        }
        @Override
        public Object getItem(int position){
            return titles[position];
        }
        @Override
        public long getItemId(int position){
            return  position;
        }
        @Override
        public View getView(int position,View convertView,ViewGroup parent){
            ViewHolder holder =null;
            if(convertView == null){
                convertView = View.inflate( MainActivity.this,R.layout.list_item,null);
                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;
    }
}