android簡易購物商城

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical"
 6     >
 7 
 8     <TextView
 9
 
         android:layout_width="match_parent"
10         android:layout_height="45dp"
11         android:text="購物商城"
12         android:textSize="18sp"
13         android:textColor="#ffffff"
14         android:background="#ff8f03"
15         android:gravity="center"
16         />
17 
18     <ListView
 
19         android:layout_width="match_parent"
20         android:layout_height="match_parent"
21         android:id="@+id/lv"
22         />
23 
24 </LinearLayout>

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width
 
="match_parent"
 4     android:layout_height="match_parent"
 5     android:padding="16dp"
 6     >
 7     <ImageView
 8         android:layout_width="120dp"
 9         android:layout_height="90dp"
10         android:layout_centerVertical="true"
11         android:id="@+id/iv"
12         />
13     <RelativeLayout
14         android:layout_width="wrap_content"
15         android:layout_height="wrap_content"
16         android:layout_marginLeft="10dp"
17         android:layout_toRightOf="@+id/iv"
18         android:layout_centerVertical="true"
19         >
20         <TextView
21             android:id="@+id/title"
22             android:layout_width="wrap_content"
23             android:layout_height="wrap_content"
24             android:text="桌子"
25             android:textSize="20sp"
26             android:textColor="#000000"
27             />
28         <TextView
29             android:layout_width="wrap_content"
30             android:layout_height="wrap_content"
31             android:id="@+id/tv_price"
32             android:text="價格:"
33             android:textSize="20sp"
34             android:layout_marginTop="10dp"
35             android:layout_below="@+id/title"
36             android:textColor="#ff8f03"
37             />
38         <TextView
39             android:layout_width="wrap_content"
40             android:layout_height="wrap_content"
41             android:id="@+id/price"
42             android:text="1000"
43             android:textSize="20sp"
44             android:layout_below="@+id/title"
45             android:layout_toRightOf="@+id/tv_price"
46             android:textColor="#ff8f03"
47             android:layout_marginTop="10dp"
48             />
49 
50 
51     </RelativeLayout>
52 
53 </RelativeLayout>

 1 package com.example.myapplication;
 2 
 3 import androidx.appcompat.app.AppCompatActivity;
 4 
 5 import android.os.Bundle;
 6 import android.view.View;
 7 import android.view.ViewGroup;
 8 import android.widget.BaseAdapter;
 9 import android.widget.ImageView;
10 import android.widget.ListView;
11 import android.widget.TextView;
12 
13 public class MainActivity extends AppCompatActivity {
14     private String[] titles ={"草莓","荔枝","火龍果","橙子","芒果","櫻桃"};
15     private String[] prices ={"15元/kg","10元/kg","30元/kg","5元/kg","20元/kg","40元/kg"};
16     private  int[] icons ={R.drawable.a,R.drawable.b,R.drawable.c,R.drawable.d,R.drawable.e,R.drawable.f};
17 
18     @Override
19     protected void onCreate(Bundle savedInstanceState) {
20         super.onCreate(savedInstanceState);
21         setContentView(R.layout.activity_main);
22         ListView listView=  findViewById(R.id.lv);
23         MyBaseAdapter adapter =new MyBaseAdapter();
24         listView.setAdapter(adapter);
25     }
26 
27     class MyBaseAdapter extends BaseAdapter{
28 
29         @Override
30         public int getCount() {
31             return titles.length;
32         }
33 
34         @Override
35         public Object getItem(int position) {
36             return titles[position];
37         }
38 
39         @Override
40         public long getItemId(int position) {
41             return position;
42         }
43 
44         @Override
45         public View getView(int position, View convertView, ViewGroup parent) {
46             ViewHolder holder;
47             if(convertView==null){
48                 convertView= View.inflate(MainActivity.this,R.layout.list_item,null);
49                 holder =new ViewHolder();
50                 holder.title = convertView.findViewById(R.id.title);
51                 holder.price = convertView.findViewById(R.id.price);
52                 holder.iv= convertView.findViewById(R.id.iv);
53                 convertView.setTag(holder);
54             }else {
55                 holder=(ViewHolder) convertView.getTag();
56             }
57             holder.title.setText(titles[position]);
58             holder.price.setText(prices[position]);
59             holder.iv.setImageResource(icons[position]);
60             return convertView;
61         }
62     }
63     class ViewHolder{
64         TextView title;
65         TextView price;
66         ImageView iv;
67     }
68 }