【Android开发基础】购物车代码整理
文章目录
-
- 一、数据库设计
- 二、Home界面
- 三、购物车模块
- 四、添加
- 五、源代码
这个月总算忙完了，总算能够抽出时间来，认真写一下博客了。整理一下购物车的代码
一、数据库设计
- 基于SqLite简单设计一个数据存储逻辑
- 实体（接收数据）
import androidx.lifecycle.LiveData;
public class Cart extends LiveData<Cart> {
int id;
int shop_id;
int number;
Shop shop;
public int getId() {
return id;
}
public int getShop_id() {
return shop_id;
}
public int getNumber() {
return number;
}
public Shop getShop() {
return shop;
}
public void setId(int id) {
this.id = id;
postValue(this);
}
public void setShop_id(int shop_id) {
this.shop_id = shop_id;
postValue(this);
}
public void setNumber(int number) {
this.number = number;
postValue(this);
}
public void setShop(Shop shop) {
this.shop = shop;
postValue(this);
}
@Override
public String toString() {
return "Cart{" +
"id=" + id +
", shop_id=" + shop_id +
", number=" + number +
", shop=" + shop +
'}';
}
}
import androidx.lifecycle.LiveData;
public class Shop extends LiveData<Shop> {
int id;
String image;
String name;
int price;
String bus;
float dis;
String time;
String des;
public int getId() {
return id;
}
public String getImage() {
return image;
}
public String getName() {
return name;
}
public int getPrice() {
return price;
}
public String getBus() {
return bus;
}
public float getDis() {
return dis;
}
public String getTime() {
return time;
}
public String getDes() {
return des;
}
public void setId(int id) {
this.id = id;
postValue(this);
}
public void setImage(String image) {
this.image = image;
postValue(this);
}
public void setName(String name) {
this.name = name;
postValue(this);
}
public void setPrice(int price) {
this.price = price;
postValue(this);
}
public void setBus(String bus) {
this.bus = bus;
postValue(this);
}
public void setDis(float dis) {
this.dis = dis;
postValue(this);
}
public void setTime(String time) {
this.time = time;
postValue(this);
}
public void setDes(String des) {
this.des = des;
postValue(this);
}
@Override
public String toString() {
return "Shop{" +
"id=" + id +
", image='" + image + '\'' +
", name='" + name + '\'' +
", price=" + price +
", bus='" + bus + '\'' +
", dis=" + dis +
", time='" + time + '\'' +
", des='" + des + '\'' +
'}';
}
}
- SQL实现类
public class CartOrder {
public static final String DATABASE_DATA = "db_cart"; // 数据库名
public static final String DATABASE_TABLE = "xpq_cart"; // 表名
public static final int DATABASE_INS = 1;
public static final String NOTEPAD_ID = "id";
public static final String NOTEPAD_SHOP_ID = "shop_id";
public static final String NOTEPAD_NUMBER = "number";
}
public class ShopOrder {
public static final String DATABASE_DATA = "db_data"; // 数据库名
public static final String DATABASE_TABLE = "xpq_shop"; // 表名
public static final int DATABASE_INS = 1;
public static final String NOTEPAD_ID = "id";
public static final String NOTEPAD_Image = "image"; // 图
public static final String NOTEPAD_NAME = "name"; // 名
public static final String NOTEPAD_PRICE = "price"; // 价格
public static final String NOTEPAD_BUS = "business"; // 商家
public static final String NOTEPAD_DIS = "discount"; // 折扣
public static final String NOTEPAD_TIME = "time"; // 时间
public static final String NOTEPAD_DES = "des"; // 描述
}
- IDUS
SqlCart.java
public class SqlCart extends SQLiteOpenHelper {
SQLiteDatabase sqLiteDatabase;
private SqlShop sqlShop;
public SqlCart(@Nullable Context context) {
super(context, CartOrder.DATABASE_DATA, null, CartOrder.DATABASE_INS);
sqLiteDatabase = this.getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + CartOrder.DATABASE_TABLE + "("
+ CartOrder.NOTEPAD_ID + " integer primary key autoincrement,"
+ CartOrder.NOTEPAD_SHOP_ID + " integer,"
+ CartOrder.NOTEPAD_NUMBER + " integer)");
}
/**
* 增
* @param c
* @return
*/
public boolean insert(Cart c) {
ContentValues values = new ContentValues();
values.put(CartOrder.NOTEPAD_SHOP_ID, c.getShop_id());
values.put(CartOrder.NOTEPAD_NUMBER, c.getNumber());
return
sqLiteDatabase.insert(CartOrder.DATABASE_TABLE, null, values) > 0;
}
/**
* 改
* @param c
* @return
*/
public boolean update(Cart c) {
ContentValues values = new ContentValues();
values.put(CartOrder.NOTEPAD_NUMBER, c.getNumber());
String sql = CartOrder.NOTEPAD_ID + "=?";
String[] id = new String[]{String.valueOf(c.getId())};
return
sqLiteDatabase.update(CartOrder.DATABASE_TABLE, values, sql, id) > 0;
}
/**
* 删
* @param id
* @return
*/
public boolean delete(int id) {
String sql = CartOrder.NOTEPAD_ID + "=?";
String[] va = new String[]{String.valueOf(id)};
return
sqLiteDatabase.delete(CartOrder.DATABASE_TABLE, sql, va) > 0;
}
/**
* 查
* @return
*/
public List<Cart> select(View v) { // 全表遍历
sqlShop = new SqlShop(v.getContext());
List<Cart> list = new ArrayList<Cart>();
try {
Cursor cursor = sqLiteDatabase.rawQuery("select * from " + CartOrder.DATABASE_TABLE,
null, null);
if (cursor != null) {
while (cursor.moveToNext()) {
Cart d = new Cart();
String id = cursor.getString(cursor.getColumnIndex(CartOrder.NOTEPAD_ID));
int ids = Integer.valueOf(id);
int shop_id = cursor.getInt(cursor.getColumnIndex(CartOrder.NOTEPAD_SHOP_ID));
d.setId(ids);
d.setShop_id(shop_id);
d.setNumber(cursor.getInt(cursor.getColumnIndex(CartOrder.NOTEPAD_NUMBER)));
d.setShop(sqlShop.select(shop_id));
list.add(d);
}
cursor.close();
} else {
Log.i("SqlCart-select", "获取Data的信息出现问题!!");
}
} catch (Exception e) {
e.printStackTrace();
}
return list;
}
public List<Cart> select(View v, int sid) { // 全表遍历
sqlShop = new SqlShop(v.getContext());
List<Cart> list = new ArrayList<Cart>();
try {
Cursor cursor = sqLiteDatabase.rawQuery("select * from " + CartOrder.DATABASE_TABLE +
" where " + CartOrder.NOTEPAD_SHOP_ID + "=" + sid,
null,null );
if (cursor != null) {
while (cursor.moveToNext()) {
Cart d = new Cart();
String id = cursor.getString(cursor.getColumnIndex(CartOrder.NOTEPAD_ID));
int ids = Integer.valueOf(id);
int shop_id = cursor.getInt(cursor.getColumnIndex(CartOrder.NOTEPAD_SHOP_ID));
d.setId(ids);
d.setShop_id(shop_id);
d.setNumber(cursor.getInt(cursor.getColumnIndex(CartOrder.NOTEPAD_NUMBER)));
d.setShop(sqlShop.select(shop_id));
list.add(d);
}
cursor.close();
} else {
Log.i("SqlCart-select", "获取Data的信息出现问题!!");
}
} catch (Exception e) {
e.printStackTrace();
}
return list;
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
SqlShop.java
public class SqlShop extends SQLiteOpenHelper {
SQLiteDatabase sqLiteDatabase;
/**
* Create a helper object to create, open, and/or manage a database.
* This method always returns very quickly. The database is not actually
* created or opened until one of {@link #getWritableDatabase} or
* {@link #getReadableDatabase} is called.
*
* @param context to use for locating paths to the the database
* {@link #onUpgrade} will be used to upgrade the database; if the database is
* newer, {@link #onDowngrade} will be used to downgrade the database
*/
public SqlShop(@Nullable Context context) {
super(context, ShopOrder.DATABASE_DATA, null, ShopOrder.DATABASE_INS);
sqLiteDatabase = this.getWritableDatabase();
}
/**
* Called when the database is created for the first time. This is where the
* creation of tables and the initial population of the tables should happen.
*
* @param db The database.
*/
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + ShopOrder.DATABASE_TABLE + "("
+ ShopOrder.NOTEPAD_ID + " integer primary key autoincrement,"
+ ShopOrder.NOTEPAD_Image + " VARCHAR(25),"
+ ShopOrder.NOTEPAD_NAME + " VARCHAR(50),"
+ ShopOrder.NOTEPAD_PRICE + " integer,"
+ ShopOrder.NOTEPAD_BUS + " VARCHAR(25),"
+ ShopOrder.NOTEPAD_DIS + " float,"
+ ShopOrder.NOTEPAD_TIME + " VARCHAR(25),"
+ ShopOrder.NOTEPAD_DES + " VARCHAR(25));");
}
/**
* Called when the database needs to be upgraded. The implementation
* should use this method to drop tables, add tables, or do anything else it
* needs to upgrade to the new schema version.
*
*
* The SQLite ALTER TABLE documentation can be found
* here. If you add new columns
* you can use ALTER TABLE to insert them into a live table. If you rename or remove columns
* you can use ALTER TABLE to rename the old table, then create the new table and then
* populate the new table with the contents of the old table.
*
* This method executes within a transaction. If an exception is thrown, all changes
* will automatically be rolled back.
*
*
* @param db The database.
* @param oldVersion The old database version.
* @param newVersion The new database version.
*/
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
/**
* 增
* @param s
* @return
*/
public boolean insert(Shop s) {
ContentValues values = new ContentValues();
values.put(ShopOrder.NOTEPAD_Image, s.getImage());
values.put(ShopOrder.NOTEPAD_NAME, s.getName());
values.put(ShopOrder.NOTEPAD_PRICE, s.getPrice());
values.put(ShopOrder.NOTEPAD_BUS, s.getBus());
values.put(ShopOrder.NOTEPAD_DIS, s.getDis());
values.put(ShopOrder.NOTEPAD_TIME, s.getTime());
values.put(ShopOrder.NOTEPAD_DES, s.getDes());
return
sqLiteDatabase.insert(ShopOrder.DATABASE_TABLE, null, values) > 0;
}
/**
* 删
* @param id
* @return
*/
public boolean delete(int id) {
String sql = ShopOrder.NOTEPAD_ID + "=?";
String[] va = new String[]{String.valueOf(id)};
return
sqLiteDatabase.delete(ShopOrder.DATABASE_TABLE, sql, va) > 0;
}
/**
* 查
* @return
*/
public List<Shop> select() { // 全表遍历
List<Shop> list = new ArrayList<Shop>();
try {
Cursor cursor = sqLiteDatabase.rawQuery("select * from " + ShopOrder.DATABASE_TABLE,
null, null);
if (cursor != null) {
while (cursor.moveToNext()) {
Shop s = new Shop();
String id = cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_ID));
int ids = Integer.valueOf(id);
s.setId(ids);
s.setImage(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_Image)));
s.setName(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_NAME)));
s.setPrice(cursor.getInt(cursor.getColumnIndex(ShopOrder.NOTEPAD_PRICE)));
s.setBus(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_BUS)));
s.setDis(cursor.getFloat(cursor.getColumnIndex(ShopOrder.NOTEPAD_DIS)));
s.setTime(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_TIME)));
s.setDes(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_DES)));
list.add(s);
}
cursor.close();
} else {
Log.i("DataSql-select", "获取Data的信息出现问题!!");
}
} catch (Exception e) {
e.printStackTrace();
}
return list;
}
public Shop select(int i) {
Shop s = null;
try {
Cursor cursor = sqLiteDatabase.rawQuery("select * from " + ShopOrder.DATABASE_TABLE +
" where " + ShopOrder.NOTEPAD_ID + "=" + i,
null,null );
if (cursor.moveToNext()){
s = new Shop();
String id = cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_ID));
int ids = Integer.valueOf(id);
s.setId(ids);
s.setImage(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_Image)));
s.setName(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_NAME)));
s.setPrice(cursor.getInt(cursor.getColumnIndex(ShopOrder.NOTEPAD_PRICE)));
s.setBus(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_BUS)));
s.setDis(cursor.getFloat(cursor.getColumnIndex(ShopOrder.NOTEPAD_DIS)));
s.setTime(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_TIME)));
s.setDes(cursor.getString(cursor.getColumnIndex(ShopOrder.NOTEPAD_DES)));
} else {
Log.i("DataSql-select", "连接异常!!");
}
} catch (Exception e) {
e.printStackTrace();
}
return s;
}
}
二、Home界面
- 样图
- UI界面设计
<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=".ui.home.HomeFragment"
android:paddingBottom="?attr/actionBarSize"
android:background="#F0F0F0"
android:padding="5dp">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/listShop"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:paddingLeft="8dp"
android:paddingRight="8dp"
android:background="@drawable/shape"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="right|bottom"
android:paddingBottom="80dp"
android:paddingRight="10dp">
<Button
android:id="@+id/homeCart"
android:layout_width="50dp"
android:layout_height="50dp"
android:background="@drawable/shape_circular"/>
RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="right|bottom"
android:paddingBottom="115dp"
android:layout_marginRight="5dp">
<TextView
android:id="@+id/homeCartNumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="4dp"
android:background="@drawable/shape_circular_number"
android:textColor="#FFF"
android:textSize="10dp"/>
RelativeLayout>
RelativeLayout>
- 内部逻辑
HomeFragment.java
public class HomeFragment extends Fragment {
private HomeViewModel homeViewModel;
private RecyclerView listShop; // 数据渲染控件
private List<Shop> shopList; // 数据地址
private List<Cart> cartList; // 数据地址
private SqlShop sqlShop; // sqLite数据库
private SqlCart sqlCart; // sqLite数据库 SqlCart
private Button homeCart;
private TextView homeCartNumber;
public View onCreateView(@NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
homeViewModel =
ViewModelProviders.of(this).get(HomeViewModel.class);
View root = inflater.inflate(R.layout.fragment_home, container, false);
init(root); // 初始化
return root;
}
private void init(View root) {
// SQL
sqlShop = new SqlShop(root.getContext());
sqlCart = new SqlCart(root.getContext());
// Model
shopList = homeViewModel.getListShop(sqlShop);
cartList = homeViewModel.getCartList(sqlCart, root);
// View
listShop = root.findViewById(R.id.listShop);
homeCart = root.findViewById(R.id.homeCart);
homeCartNumber = root.findViewById(R.id.homeCartNumber);
// UI渲染
homeCart.setText(XpqIcoMoon.CART);
XpqIcoMoonUtils.setIOC(homeCart);
homeCartNumber.setText(String.valueOf(alg.CountZPrice(cartList).get("number")));
// 数据渲染
getListAdapter();
}
// List适配器
private void getListAdapter() {
StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(1,StaggeredGridLayoutManager.VERTICAL);
listShop.setLayoutManager(layoutManager);
ListAdapter adapter = new ListAdapter(shopList, homeCartNumber);
listShop.setAdapter(adapter);
}
}
HomeViewModel.java
public class HomeViewModel extends ViewModel {
public List<Shop> getListShop(SqlShop sqlShop) {
return sqlShop.select();
}
public List<Cart> getCartList(SqlCart sqlCart, View root) {
return sqlCart.select(root);
}
}
三、购物车模块
- 样图
- UI设计
<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=".ui.dashboard.DashboardFragment"
android:paddingBottom="?attr/actionBarSize"
android:background="#F0F0F0">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/listCart"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:paddingLeft="8dp"
android:paddingRight="8dp"
android:layout_margin="5dp"
android:background="@drawable/shape"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right">
<Button
android:id="@+id/cart_z_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="30dp"
android:layout_marginBottom="10dp"
android:background="@drawable/shape_z_price"/>
LinearLayout>
LinearLayout>
RelativeLayout>
- 后台逻辑
DashboardFragment.java
public class DashboardFragment extends Fragment {
private DashboardViewModel dashboardViewModel;
private RecyclerView listCart;
List<Cart> cartList; // 数据地址
private SqlCart sqlCart; // sqLite数据库 SqlCart
private Button cart_z_price;
public View onCreateView(@NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
dashboardViewModel =
ViewModelProviders.of(this).get(DashboardViewModel.class);
View root = inflater.inflate(R.layout.fragment_dashboard, container, false);
// 初始化
init(root);
return root;
}
private void init(View root) {
sqlCart = new SqlCart(root.getContext());
listCart = root.findViewById(R.id.listCart);
cart_z_price = root.findViewById(R.id.cart_z_price);
cartList = dashboardViewModel.getCartList(sqlCart, root);
// 渲染结算
cart_z_price = root.findViewById(R.id.cart_z_price);
cart_z_price.setText("结算: ￥ " + String.format("%.2f", alg.CountZPrice(cartList).get("price")));
// 数据渲染
getCartAdapter();
}
// List适配器
private void getCartAdapter() {
StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(1,StaggeredGridLayoutManager.VERTICAL);
listCart.setLayoutManager(layoutManager);
CartAdapter adapter = new CartAdapter(cartList, cart_z_price);
listCart.setAdapter(adapter);
}
}
DashboardViewModel.java
public class DashboardViewModel extends ViewModel {
public List<Cart> getCartList(SqlCart sqlCart, View root) {
return sqlCart.select(root);
}
}
四、添加
- 样图
- UI界面设计
<TableLayout 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=".ui.notifications.NotificationsFragment"
android:padding="50dp"
android:background="#F0F0F0">
<TableRow>
<TextView
android:layout_width="100dp"
android:text="图片:"
android:textSize="20dp"/>
<ImageButton
android:layout_width="150dp"
android:layout_height="150dp"
android:background="@drawable/ic_launcher_background"/>
TableRow>
<TableRow>
<TextView
android:text="名称:"
android:textSize="20dp"/>
<EditText
android:id="@+id/name"/>
TableRow>
<TableRow>
<TextView
android:text="价格:"
android:textSize="20dp"/>
<EditText
android:id="@+id/price"/>
TableRow>
<TableRow>
<TextView
android:text="商家:"
android:textSize="20dp"/>
<EditText
android:id="@+id/bus"/>
TableRow>
<TableRow>
<TextView
android:text="折扣:"
android:textSize="20dp"/>
<EditText
android:id="@+id/dis"/>
TableRow>
<TableRow>
<TextView
android:text="时间:"
android:textSize="20dp"/>
<EditText
android:id="@+id/time"/>
TableRow>
<TableRow>
<TextView
android:text="描述:"
android:textSize="20dp"/>
<EditText
android:id="@+id/des"/>
TableRow>
<TableRow
android:layout_marginTop="20dp">
<Button
android:id="@+id/qk"
android:text="清空"/>
<Button
android:id="@+id/add"
android:text="添加"/>
TableRow>
TableLayout>
- 后台逻辑
NotificationsFragment.java
public class NotificationsFragment extends Fragment {
private NotificationsViewModel notificationsViewModel;
private Button add, qk;
public View onCreateView(@NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
// 数据
notificationsViewModel =
ViewModelProviders.of(this).get(NotificationsViewModel.class);
View root = inflater.inflate(R.layout.fragment_notifications, container, false);
// 绑定事件
onClicks(root);
return root;
}
private void onClicks(final View root) {
add = root.findViewById(R.id.add);
qk = root.findViewById(R.id.qk);
add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
notificationsViewModel.setShop(root);
}
});
qk.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
notificationsViewModel.qkEditText(root);
}
});
}
}
NotificationsViewModel.java
public class NotificationsViewModel extends ViewModel {
private Shop shop;
private EditText name, price, bus, dis, time, des;
private SqlShop sqlShop;
// 存储数据
public void setShop(View root) {
sqlShop = new SqlShop(root.getContext()); // 初始化数据库
shop = new Shop(); // 定义实体
name = root.findViewById(R.id.name);
price = root.findViewById(R.id.price);
bus = root.findViewById(R.id.bus);
dis = root.findViewById(R.id.dis);
time = root.findViewById(R.id.time);
des = root.findViewById(R.id.des);
shop.setImage("");
shop.setName(name.getText().toString());
shop.setBus(bus.getText().toString());
shop.setTime(time.getText().toString());
shop.setDes(des.getText().toString());
try { // 存在两个非String类型数据需要做转型异常判断
shop.setPrice(Integer.valueOf(price.getText().toString()));
shop.setDis(Float.valueOf(dis.getText().toString()));
} catch (NumberFormatException e) {
Toast.makeText(root.getContext(), "请输入正确的数据!", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
if (sqlShop.insert(shop)) { // 数据库字段有长度限定。如果需要具体到每个字段，自己写判断语句。
Log.i("data", shop.toString());
Toast.makeText(root.getContext(), "数据库插入成功!", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(root.getContext(), "数据库插入失败!", Toast.LENGTH_SHORT).show();
}
}
public void qkEditText(View root) {
name = root.findViewById(R.id.name);
price = root.findViewById(R.id.price);
bus = root.findViewById(R.id.bus);
dis = root.findViewById(R.id.dis);
time = root.findViewById(R.id.time);
des = root.findViewById(R.id.des);
name.setText("");
price.setText("");
bus.setText("");
dis.setText("");
time.setText("");
des.setText("");
}
}
五、源代码
关于效果展示，前往（http://t.csdn.cn/KcvTk）
关于适配器Adapter的学习，前往（http://t.csdn.cn/hEXUF）
关于源代码，前往（https://download.csdn.net/download/weixin_48916759/87844422）