android-购物车

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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">

    <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"/>

</RelativeLayout>

<?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" />

    <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:layout_marginLeft="115dp"
            android:t="@+id/iv"
            android:textColor="#000000"/>
        <TextView
            android:id="@+id/tv_price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="价格："
            android:textSize="20sp"
            android:layout_marginTop="10dp"
            android:layout_below="@+id/title"
            android:textColor="#FF8F03"/>
        <TextView
            android:id="@+id/price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            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.aninterface;

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.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private ListView mListview;
    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"};
    private int[] icons = new int[]{R.drawable.ln, R.drawable.x, R.drawable.d, R.drawable.d, R.drawable.ln, R.drawable.x,};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mListview= findViewById(R.id.lv);
        MyBaseAdapter mAdapter;
        mAdapter = new MyBaseAdapter();
        mListview.setAdapter((ListAdapter) mAdapter);


            class ViewHolder {
                TextView title, price;
                ImageView iv;
            }

            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.layout, 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;
            }
        }
    }

    private class MyBaseAdapter {
    }
}