Android购物商城

android简易购物商城

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    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:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/lv"
        />

</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:layout_width="120dp"
        android:layout_height="90dp"
        android:layout_centerVertical="true"
        android:id="@+id/iv"
        />
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_toRightOf="@+id/iv"
        android:layout_centerVertical="true"
        >
        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="桌子"
            android:textSize="20sp"
            android:textColor="#000000"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/tv_price"
            android:text="价格:"
            android:textSize="20sp"
            android:layout_marginTop="10dp"
            android:layout_below="@+id/title"
            android:textColor="#ff8f03"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/price"
            android:text="1000"
            android:textSize="20sp"
            android:layout_below="@+id/title"
            android:layout_toRightOf="@+id/tv_price"
            android:textColor="#ff8f03"
            android:layout_marginTop="10dp"
            />


    </RelativeLayout>

</RelativeLayout>

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

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 AppCompatActivity {
    private String[] titles ={"草莓","荔枝","火龙果","橙子","芒果","樱桃"};
    private String[] prices ={"15元/kg","10元/kg","30元/kg","5元/kg","20元/kg","40元/kg"};
    private  int[] icons ={R.drawable.a,R.drawable.b,R.drawable.c,R.drawable.d,R.drawable.e,R.drawable.f};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ListView listView=  findViewById(R.id.lv);
        MyBaseAdapter adapter =new MyBaseAdapter();
        listView.setAdapter(adapter);
    }

    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;
            if(convertView==null){
                convertView= View.inflate(MainActivity.this,R.layout.list_item,null);
                holder =new ViewHolder();
                holder.title = convertView.findViewById(R.id.title);
                holder.price = convertView.findViewById(R.id.price);
                holder.iv= 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.setImageResource(icons[position]);
            return convertView;
        }
    }
    class ViewHolder{
        TextView title;
        TextView price;
        ImageView iv;
    }
}