Android實現購物商城

<ListView
        android:id="@+id/lv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:listSelector="#B5DCFA">


</ListView>

<?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">
    <ImageView
        android:id="@+id/iv"
        android:layout_width="120dp"
        android:layout_height="90dp"
        android:background="@drawable/table"
        android:layout_marginRight="10dp">
    </ImageView>
    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/iv"
        android:text="桌子"
        android:textSize="20dp"
        android:layout_marginTop="10dp">
    </TextView>
    <TextView
        android:id="@+id/price"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/iv"
        android:layout_below="@id/title"
        android:text="價格:   "
        android:textSize="15dp"
        android:textColor="#FF8F03"
        android:layout_marginTop="15dp">
    </TextView>
    <TextView
        android:id="@+id/count"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@id/price"
        android:layout_toRightOf="@id/price"
        android:textSize="15dp"
        android:text="1000"
        android:textColor="#FF8F03">
    </TextView>
</RelativeLayout>

public class MainActivity extends AppCompatActivity {
    private ListView listView; //ListView控件
    //商品名稱、價格、圖片集合
    private String[] titles={"桌子","蘋果","蛋糕","線衣","獼猴桃","圍巾"};
    private String[] prices={"1800元","10元/kg","300元","350元","10元/kg","280元"};
    private int[] icons={R.drawable.table,R.drawable.apple,R.drawable.cake,R.drawable.wireclothes,R.drawable.kiwifruit,R.drawable.scarf};


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView=findViewById(R.id.lv);       //獲取ListView控件
        MallAdapter adapter=new MallAdapter();    //創建一個Adapter實例
        listView.setAdapter(adapter);    //設置adapter，將適配器指定給ListView對象
    }
    //創建一個MallAdapter類繼承自BaseAdapter類，並重寫類中的一些方法
    public class MallAdapter extends BaseAdapter {

        @Override
        public int getCount() {   //獲取item條數
            return titles.length;    //返回ListView Item條目的總數
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
                /*
        position:當前的item的位置
        convertView：指定的單元格佈局
        parent：用於加載xml佈局
         */
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView==null){
                //通過inflate（）方法加載列表條目的佈局文件
                convertView=View.inflate(MainActivity.this,R.layout.listview2,null);
            }
            //獲取列表條目上的控件
            TextView title=convertView.findViewById(R.id.title);
            TextView price=convertView.findViewById(R.id.count);
            ImageView iv=convertView.findViewById(R.id.iv);
            //設置界面上的文本圖片和數據信息
            title.setText(titles[position]);
            price.setText(prices[position]);
            iv.setBackgroundResource(icons[position]);
            return convertView;
        }
    }
}