商城管理系統

時間  2020-06-11
標籤 商城 管理 系統 简体版
原文   原文鏈接

 

 

 

 

 

 

 

 

 

 

 

題    目 商城管理系統設計與實現   java

系    別 信息與控制工程系         android

專    業 計算機科學與技術         sql

班    級 1701                     數據庫

學    號 173030112                服務器

姓    名 李亞楠                   app

 

1. 基於Android的商城管理系統設計與實現

1.1 系統需求分析

1.1.1 用例分析

用例圖如1.1所示eclipse

 

圖1.1 商城用例圖數據庫設計

 

 

 

 

 

 

 

 

 

1.1.2 數據邏輯模型

商城管理系統ER圖如圖1.2所示ide

 

 

 

 

                       n工具

 

 

 

                 n                                                n

 

                           1                          1   

 

 

             n

 

 

 

 

 

 

 

圖1.2 商城管理系統E-R圖

1.2 系統整體設計

 

圖1.3 商城管理功能圖

 

  在互聯網迅猛發展的時代，網上購物已經成爲許多人平常生活的一部分，足不出戶，即可得天下萬物。而在移動平臺技術日益成熟的現在，在移動平臺上實現網上購物功能更是將來的趨勢，時代的潮流。
　　爲了在Android平臺上實現移動商城系統，本文以基於Linux的開放源代碼操做系統Android爲研究對象，進行實際的開發工做。主要任務包括三個方面:第一，在Android系統上開發一款功能強大，可維護性好，用戶友好的手機客戶端軟件;第二，開發一款能有效支持移動平臺應用的，穩定，高效的服務端後臺系統;第三，尋求一種可以有效的解決移動平臺與服務器之間數據交互，同時下降系統消耗的數據傳輸途徑。
　　論文從項目的背景出發，介紹了基於Android的移動商城系統的開發過程和研究價值，探討了如何將各項先進技術融入項目的開發過程當中。本文以本系統的部分後臺開發，前臺客戶端相關功能的實現，以及先後臺之間數據傳輸的開發過程爲例，詳細的描述了移動商城系統的設計和實現的過程，同時從系統開發的需求分析，詳細設計到最終的測試等多個方面對系統進行了全方位的描述，並探討了下一步的改進計劃。

 

1.3 系統數據庫設計

根據前面E-R圖設計出實現系統功能所須要的數據庫表的結構，並以表格的形式列出每個數據庫表的表結構，即字段名、類型、長度、小數位數、是否主鍵、索引、是否容許爲空、說明等。並介紹表與表之間的邏輯關係。如表3.1所示：

表3.1  user

字段名

數據類型

長度

主鍵

索引

外鍵

可空

rowid

text

11

是

 

否

否

userid

int

50

否

 

否

否

password

text

50

否

 

否

否

 

表3.2  goods

字段名

數據類型

長度

主鍵

索引

外鍵

可空

rowid

text

11

是

 

否

否

shopname

text

20

否

 

否

否

shopintro

text

50

否

 

否

否

shopprice

int

10

否

 

否

否

shopnum

int

Unknow

否

 

否

否

shopdeller

text

30

否

 

否

否

 

表3.3  buyer_goods(部門表)

字段名

數據類型

長度

主鍵

索引

外鍵

可空

rowid

int

11

是

 

否

否

id

int

20

否

 

否

否

buyerid

int

50

否

 

否

否

buyershopnum

text

50

否

 

否

否

shopname

text

50

否

 

否

否

 

1.4 系統詳細設計

1.4.1 商家模塊

表3.4 商家模塊

編號

輸入

處理

輸出

1

用戶名和密碼

根據輸入用戶名從數據庫中找一個同名的用戶而且進行密碼比對

成功則跳轉到添加商品，失敗就轉到登陸頁面

2

用戶名和密碼

向數據庫中插入一個新的商家用戶

成功則提示失敗則轉到添加頁面

 

1.4.2 顧客模塊

表3.10 部門管理模塊

編號

輸入

處理

輸出

1

用戶名和密碼

向數據庫中插入一個新的顧客用戶

成功則提示失敗則轉到添加頁面

2

充值

輸入充值金額

成功則提示充值成功

3

購買

點擊要購買商品

成功點擊已購商品顯示購買的商品則購買成功

 

 

1.4.3 登陸設計

界面設計的時候用了toast提示，而後用intent切換頁面。登陸註冊頁面以下圖3.4 所示

 

 

圖3.4 登陸註冊頁面圖

1.5 系統實現

1.5.1 註冊模塊

註冊包括商家註冊和顧客註冊。

1.5.1.1 顧客註冊

顧客註冊包括輸入帳號，輸入密碼，輸入充值金額以後點顧客，最後點擊註冊。

 

 

1.5.1.2 商家註冊

商家註冊包括輸入帳號，輸入密碼，輸入充值金額以後點商家，最後點擊註冊。

 

顧客和商家註冊代碼以下：

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_register);

try {

// 打開數據庫，若是數據庫不存在則建立數據庫

mSQLiteDatabase = this.openOrCreateDatabase(DATABASE_NAME,

Activity.MODE_PRIVATE, null);

} catch (Exception ex) {

Toast.makeText(this, "打開或建立數據庫異常:" + ex.getMessage(), 2000).show();

}

edt_userid = (EditText)this.findViewById(R.id.edt_userid);

edt_userpwd = (EditText)this.findViewById(R.id.edt_userpwd);

edt_usermoney= (EditText)this.findViewById(R.id.edt_usermoney);

Button bt3 = (Button) findViewById(R.id.button3);

bt3.setOnClickListener(new OnClickListener() {

 

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

ShopregActivity.this.finish();

}

});

Button button_register = (Button) this.findViewById(R.id.button_register);

button_register.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

String userid = edt_userid.getText().toString();

String userpwd = edt_userpwd.getText().toString();

int usermoney=Integer.parseInt(edt_usermoney.getText().toString());

RadioButton radio_buyer =(RadioButton) findViewById(R.id.radio_buyer);

String type = "seller";

if(radio_buyer.isChecked()){

type = "buyer";

}

try{

 

   mSQLiteDatabase.execSQL("insert into user values('"+userid+"','"+userpwd+"','"+usermoney+"','"+type+"')");

   Toast.makeText(ShopregActivity.this, "註冊成功!", 2000).show();

}catch(Exception e){

   Toast.makeText(ShopregActivity.this, "新增用戶失敗:" + e.getMessage(), 2000).show();

}

}

});

}

 

1.5.2 商家登陸模塊

添加商品的名稱價格數量，以後點擊發布商品。

 

 

商家發佈商品代碼： @Override

public void onClick(View v) {

// TODO Auto-generated method stub

String shopname = edit_shopname.getText().toString();

String shopintro = edit_shopintro.getText().toString();

int shopprice = Integer.parseInt(edit_shopprice.getText()

.toString());

int shopnum = Integer.parseInt(edit_shopnum.getText()

.toString());

String sql = "insert into goods values('" + shopname + "','"

+ shopintro + "',"+shopprice + "," + shopnum + ",'" + userId + "')";

try {

// 打開數據庫，若是數據庫不存在則建立數據庫

mSQLiteDatabase = openOrCreateDatabase(DATABASE_NAME,

Activity.MODE_PRIVATE, null);

mSQLiteDatabase.execSQL(sql);

Toast.makeText(ShopAddsActivity.this, "添加商品成功!",

1000).show();

Intent i = new Intent(ShopAddsActivity.this,

null);//SellerCheckShopActivity.class

 Bundle b = new Bundle();

 b.putString("user", userId);

i.putExtra("data", b);

startActivity(i);

} catch (Exception e) {

Toast.makeText(ShopAddsActivity.this,

"添加商品異常!" + e.getMessage(), 1000).show();

}

}

});

 

}

1.5.3 用戶登陸模塊

主要能夠查看商家發佈的商品名稱，本身的餘額，若是餘額不足能夠輸入充值金額而後點擊充值按鈕進行充值。

 

購買商品代碼實現：public void onClick(View v) {

// TODO Auto-generated method stub

String shopname = tv.getText().toString();

 buy_shopnum=Integer.parseInt(edt_buy_shopnum.getText().toString());

int price=Integer.parseInt(shopprice);

int total_price=buy_shopnum*price;

try {

 String a="select usermoney from user  where userid='"+userId+"' " ;

Cursor cursor = mSQLiteDatabase.rawQuery(a, null);

while (cursor.moveToNext()) {

 buyermoney= cursor.getInt(cursor.getColumnIndex("usermoney"));

 

}

 

 

if(buyermoney>=total_price){

 

String sql = "update goods set shopnum=shopnum-"+buy_shopnum+" where shopname='"+shopname+"' " ;

mSQLiteDatabase.execSQL(sql);

sql="update user set usermoney=usermoney-"+total_price+" where userid='"+userId+"'";

mSQLiteDatabase.execSQL(sql);

 sql = "insert into buyer_goods(buyerid,shopname,buyshopnum) values('" + userId + "','"

+ shopname + "','"+buy_shopnum+"')";

mSQLiteDatabase.execSQL(sql);

 

Toast.makeText(ShopbSelectActivity.this, "購買成功!",

1000).show();

Intent i = new Intent(ShopbSelectActivity.this,

ShopbSelectActivity.class);

 Bundle b = new Bundle();

 b.putString("user", userId);

i.putExtra("data", b);

startActivity(i);

}

else {Toast.makeText(ShopbSelectActivity.this, "餘額不足，請充值!",

3000).show();}

} catch (Exception e) {

Toast.makeText(ShopbSelectActivity.this,

"添加商品異常!" + e.getMessage(), 1000).show();

}

 

}

});

 

充值代碼實現：

btn_myshop.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Intent i = new Intent(ShopbSelectActivity.this,

ShopbuyerActivity.class);

 Bundle b = new Bundle();       //發送數據

 b.putString("user", userId);

i.putExtra("data", b);

startActivity(i);

}

});

edt_addmoney=(EditText)this.findViewById(R.id.edittext_addmoney);

btn_addmoney=  (Button)this.findViewById(R.id.button_addmoney);

btn_addmoney.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

String addmoney=edt_addmoney.getText().toString();

String sql = "update user set usermoney=usermoney+"+addmoney+"  where userid='"+userId+"' " ;

mSQLiteDatabase.execSQL(sql);

Toast.makeText(ShopbSelectActivity.this, "成功充值"+addmoney+"元!",

1000).show();

Intent i = new Intent(ShopbSelectActivity.this,

ShopbSelectActivity.class);

 Bundle b = new Bundle();

 b.putString("user", userId);

i.putExtra("data", b);

startActivity(i);

}

});

1.5.3.1 查看已購商品

點擊查看已購商品，頁面跳轉到已購商品的頁面，頁面顯示你當前的餘額和你所購買的商品名稱，商品單價，購買商品數量和你購買時商家的名稱。點擊返回按鈕能夠返回到前一個頁面。

 

查看已購商品代碼實現：

private void selectData() {

String sql = "select g.shopname,g.shopprice,bd.buyshopnum,g.shopseller from buyer_goods as bd,goods as g where bd.buyerid='"

+ userId + "' and bd.shopname=g.shopname";

Cursor cursor = mSQLiteDatabase.rawQuery(sql, null);

if (cursor != null) {

// 定義存儲查詢結果的List，每一行數據類型爲Map<String, Object>，其中String表明列名，Object爲值

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

Map<String, Object> map;

// 遍歷遊標對象，每一行獲取的數據存放到Map<String, Object>類型的變量map中

while (cursor.moveToNext()) {

map = new HashMap<String, Object>();

map.put("shopname", cursor.getString(cursor.getColumnIndex("shopname")));

map.put("shopprice", cursor.getInt(cursor.getColumnIndex("shopprice")));

map.put("buyshopnum", cursor.getInt(cursor.getColumnIndex("buyshopnum")));

map.put("shopseller", cursor.getString(cursor.getColumnIndex("shopseller")));

list.add(map);

}

// 建立Adapter，並於ListView綁定

SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.buyer_myshop,

new String[] { "shopname", "shopprice", "buyshopnum", "shopseller" },

new int[] { R.id.tv_buyer_myshopname, R.id.tv_buyer_myshopprice, R.id.tv_buyer_myshopnum,

R.id.tv_buyer_mysellername });

lv1.setAdapter(adapter);

}

}

 

private void selectBuyermoney() {

String sql = "select usermoney from user where userid='" + userId + "'";

// 得到查詢結果對應的遊標對象

Cursor cursor = mSQLiteDatabase.rawQuery(sql, null);

if (cursor != null) {

// 定義存儲查詢結果的List，每一行數據類型爲Map<String, Object>，其中String表明列名，Object爲值

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

Map<String, Object> map;

while (cursor.moveToNext()) {

map = new HashMap<String, Object>();

map.put("usermoney", cursor.getInt(cursor.getColumnIndex("usermoney")));

list.add(map);

}

// 建立Adapter，並於ListView綁定

SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.buyer_money2, new String[] { "usermoney" },

new int[] { R.id.tv_buyer_money2 });

lv2.setAdapter(adapter);

 

}

 

}

1.6 系統測試

本次實習所用的開發環境爲

開發技術：android

數據庫：sqlLite

開發工具：eclipse

1.6.1 項目測試 

1、測試登陸功能

2、測試註冊功能

3、測試添加商品功能

四、測試用戶購買充值功能

5、測試查已購商品功能

1.6.2 測試結果

 

 

 

 

 

 

 

以上截圖測試了本系統的大部分功能，而且成功實現了每一個功能。

 

2. 課程設計總結

本次課程設計，讓我受益不淺，此次的課程設計把本身學的java集合利用上去了，很是開心。還有就是雖然上課聽老師講課，可是本身學完作作做業以後就沒再看過，如今不少知識都忘記了，經過此次的課程設計我回憶了一遍android的基礎東西，並且把java知識複習了，經過此次的android課程設計讓我更加了解了這門學科，讓本身更有興趣的去學習這門學科，讓我感受很是開心。

而後就是經過此次的課程設計我感受到了寫代碼須要很是嚴謹，在此次的課程設計中我深有體會，尤爲是調用layout中的 控件，在我感受若是寫的不嚴謹在你調用這個控件時就很是的困難，因此咱們在課程設計須要把每一個控件的ID設置嚴謹一點，這樣咱們才能輕鬆地調用這個控件，還有就是不能有一點錯誤，否則整個程序就會不能順利地運行，還有一點就是須要作到不懂就問的習慣，讓老師同窗幫助一下這樣的話，讓你在寫代碼將會更加的流暢，還有一點就是不論遇到什麼困難和難題都須要咱們的堅持，在堅持以後咱們必定可以成功完成。總之，在此次的課程設計當中我學習到了不少知識，讓我也鞏固了一下書本上的知識，這次的課程設計在我學習生涯上起到了相當重要的一步。

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

附錄：

         商城購物系統的實現

使用技術：

UI設計：創建了5個界面

數據庫使用：運用sqlLite數據庫創建了3個表分別是用戶信息表、商品表和用戶購買商品表。

Activity組件的應用：運用了Activity組件實現了登陸界面的跳轉功能和

查看已購商品的跳轉界面。

ListView的使用：使用了2個listview實現了商家添加商品的顯示和查看用戶已購商品的顯示。     

UML類圖：

 

 

代碼：

清單文件：

/ShopCenter/src/com/example/shopcenter/MainActivity.java

/ShopCenter/src/com/example/shopcenter/ShopAddsActivity.java

/ShopCenter/src/com/example/shopcenter/ShopbSelectActivity.java

/ShopCenter/src/com/example/shopcenter/ShopbuyerActivity.java

/ShopCenter/src/com/example/shopcenter/ShopregActivity.java

/ShopCenter/res/layout/activity_buyer_check_shop.xml

/ShopCenter/res/layout/activity_buyer_select_shop.xml

/ShopCenter/res/layout/activity_main.xml

/ShopCenter/res/layout/activity_register.xml

/ShopCenter/res/layout/activity_seller_add_shop.xml

/ShopCenter/res/layout/buyer_money.xml

/ShopCenter/res/layout/buyer_money2.xml

/ShopCenter/res/layout/buyer_myshop.xml

/ShopCenter/res/layout/buyer_shop.xml

/ShopCenter/res/layout/shop_buyer.xml

佈局文件：

截圖：

 

 

/ShopCenter/res/layout/activity_buyer_check_shop.xml

/ShopCenter/res/layout/activity_buyer_select_shop.xml

/ShopCenter/res/layout/activity_main.xml

/ShopCenter/res/layout/activity_register.xml

/ShopCenter/res/layout/activity_seller_add_shop.xml

/ShopCenter/res/layout/buyer_money.xml

/ShopCenter/res/layout/buyer_money2.xml

/ShopCenter/res/layout/buyer_myshop.xml

/ShopCenter/res/layout/buyer_shop.xml

/ShopCenter/res/layout/shop_buyer.xml

Java原代碼：

主界面

package com.example.shopcenter;

 

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

 

public class MainActivity extends Activity {

//定義用於訪問SQLite的對象

private SQLiteDatabase mSQLiteDatabase = null;

//數據庫名稱

private static final String DATABASE_NAME = "test.db";

private static final String CREATE_TABLE_USER="create table if not exists user(userid text primary key,userpwd text,usermoney  integer ,usertype text)";

private static final String CREATE_TABLE_GOODS="create table if not exists goods(shopname text primary key,shopintro text,shopprice integer,shopnum integer,shopseller text)";

private static final String CREATE_TABLE_BUYER_GOODS="create table if not exists buyer_goods(id integer primary key autoincrement,buyerid text,shopname text,buyshopnum integer)";

private EditText edt_login_userid,edt_login_userpwd;

 

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

try {

// 打開數據庫，若是數據庫不存在則建立數據庫

mSQLiteDatabase = this.openOrCreateDatabase(DATABASE_NAME,

Activity.MODE_PRIVATE, null);

} catch (Exception ex) {

Toast.makeText(this, "打開或建立數據庫異常:" + ex.getMessage(), 2000).show();

}

try {

mSQLiteDatabase.execSQL(CREATE_TABLE_USER);

mSQLiteDatabase.execSQL(CREATE_TABLE_GOODS);

mSQLiteDatabase.execSQL(CREATE_TABLE_BUYER_GOODS);

} catch (Exception ex) {

Toast.makeText(this, "建立用戶表異常:" + ex.getMessage(), 2000).show();

}

Button goto_register = (Button) this.findViewById(R.id.button_goto_register);

goto_register.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

Intent i = new Intent(MainActivity.this,ShopregActivity.class);

startActivity(i);

}

});

edt_login_userid = (EditText)this.findViewById(R.id.edt_login_userid);

edt_login_userpwd = (EditText)this.findViewById(R.id.edt_login_userpwd);

Button user_login = (Button) this.findViewById(R.id.button_login);

user_login.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

String login_userid = edt_login_userid.getText().toString();

String login_userpwd = edt_login_userpwd.getText().toString();

try{

 String sql = "select * from user where userid='"+login_userid+"' and userpwd='"+login_userpwd+"'";

  Cursor cursor =  mSQLiteDatabase.rawQuery(sql,null);

  if(cursor.moveToNext()){

  String type = cursor.getString(cursor.getColumnIndex("usertype"));

  Bundle b = new Bundle();

 

  b.putString("user", login_userid);

  

  if(type.equals("seller")){

Intent i = new Intent(MainActivity.this,ShopAddsActivity.class);

i.putExtra("data", b);

startActivity(i);

   }else{

   Intent i = new Intent(MainActivity.this,ShopbSelectActivity.class);

   i.putExtra("data", b);

startActivity(i);

   }

  }else{

  Toast.makeText(MainActivity.this, "帳號或密碼錯誤!", 2000).show();

  }

  

}catch(Exception e){

   Toast.makeText(MainActivity.this, e.getMessage(), 2000).show();

}

}

});

}

 

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

    

}

用戶註冊類：

package com.example.shopcenter;

import android.os.Bundle;

import android.app.Activity;

import android.database.sqlite.SQLiteDatabase;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.RadioButton;

import android.widget.Toast;

 

public class ShopregActivity extends Activity {

//定義用於訪問SQLite的對象

private SQLiteDatabase mSQLiteDatabase = null;

//數據庫名稱

private static final String DATABASE_NAME = "test.db";

private EditText edt_userid,edt_userpwd,edt_usermoney;

 

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_register);

try {

// 打開數據庫，若是數據庫不存在則建立數據庫

mSQLiteDatabase = this.openOrCreateDatabase(DATABASE_NAME,

Activity.MODE_PRIVATE, null);

} catch (Exception ex) {

Toast.makeText(this, "打開或建立數據庫異常:" + ex.getMessage(), 2000).show();

}

edt_userid = (EditText)this.findViewById(R.id.edt_userid);

edt_userpwd = (EditText)this.findViewById(R.id.edt_userpwd);

edt_usermoney= (EditText)this.findViewById(R.id.edt_usermoney);

Button bt3 = (Button) findViewById(R.id.button3);

bt3.setOnClickListener(new OnClickListener() {

 

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

ShopregActivity.this.finish();

}

});

Button button_register = (Button) this.findViewById(R.id.button_register);

button_register.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

String userid = edt_userid.getText().toString();

String userpwd = edt_userpwd.getText().toString();

int usermoney=Integer.parseInt(edt_usermoney.getText().toString());

RadioButton radio_buyer =(RadioButton) findViewById(R.id.radio_buyer);

String type = "seller";

if(radio_buyer.isChecked()){

type = "buyer";

}

try{

 

   mSQLiteDatabase.execSQL("insert into user values('"+userid+"','"+userpwd+"','"+usermoney+"','"+type+"')");

   Toast.makeText(ShopregActivity.this, "註冊成功!", 2000).show();

}catch(Exception e){

   Toast.makeText(ShopregActivity.this, "新增用戶失敗:" + e.getMessage(), 2000).show();

}

}

});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.register, menu);

return true;

}

 

}

 

 

商品發佈類：

package com.example.shopcenter;

 

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.database.sqlite.SQLiteDatabase;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

 

 

public class ShopAddsActivity extends Activity {

private SQLiteDatabase mSQLiteDatabase = null;

private static final String DATABASE_NAME = "test.db";

private EditText edit_shopnum, edit_shopname, edit_shopprice,edit_shopintro;

private String userId;

Button button_addshop, button_reset,button_seller_myshop;

 

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_seller_add_shop);

Intent i = this.getIntent();

Bundle b = i.getBundleExtra("data");

userId = b.getString("user");

edit_shopname = (EditText) findViewById(R.id.edt_shopname);

edit_shopintro = (EditText) findViewById(R.id.edt_shopintro);

edit_shopprice = (EditText) findViewById(R.id.edt_shopprice);

edit_shopnum = (EditText) findViewById(R.id.edit_shopnum);

Button bt5 = (Button) findViewById(R.id.button5);

bt5.setOnClickListener(new OnClickListener() {

 

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

ShopAddsActivity.this.finish();

}

});

button_addshop = (Button) findViewById(R.id.button_addshop);

button_addshop.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

String shopname = edit_shopname.getText().toString();

String shopintro = edit_shopintro.getText().toString();

int shopprice = Integer.parseInt(edit_shopprice.getText()

.toString());

int shopnum = Integer.parseInt(edit_shopnum.getText()

.toString());

String sql = "insert into goods values('" + shopname + "','"

+ shopintro + "',"+shopprice + "," + shopnum + ",'" + userId + "')";

try {

// 打開數據庫，若是數據庫不存在則建立數據庫

mSQLiteDatabase = openOrCreateDatabase(DATABASE_NAME,

Activity.MODE_PRIVATE, null);

mSQLiteDatabase.execSQL(sql);

Toast.makeText(ShopAddsActivity.this, "添加商品成功!",

1000).show();

Intent i = new Intent(ShopAddsActivity.this,

null);//SellerCheckShopActivity.class

 Bundle b = new Bundle();

 b.putString("user", userId);

i.putExtra("data", b);

startActivity(i);

} catch (Exception e) {

// Toast.makeText(ShopAddsActivity.this,

// "添加商品異常!" + e.getMessage(), 1000).show();

}

}

});

 

}

 

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.seller_add_shop, menu);

return true;

}

 

}

已購商品類：

package com.example.shopcenter;

 

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.AdapterView;

import android.widget.Button;

import android.widget.ListView;

import android.widget.SimpleAdapter;

import android.widget.TextView;

import android.widget.AdapterView.OnItemClickListener;

 

public class ShopbuyerActivity extends Activity {

 

private SQLiteDatabase mSQLiteDatabase = null;

// 數據庫名稱

private static final String DATABASE_NAME = "test.db";

private String userId, shopname;

private TextView tv;

private ListView lv1, lv2;

int buyermoney;

 

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_buyer_check_shop);

Intent i = this.getIntent(); // 接收數據

Bundle b = i.getBundleExtra("data");

userId = b.getString("user");

lv2 = (ListView) this.findViewById(R.id.lv_buyer_money);

lv1 = (ListView) this.findViewById(R.id.lv_buyer_myshop);

mSQLiteDatabase = openOrCreateDatabase(DATABASE_NAME, Activity.MODE_PRIVATE, null);

selectBuyermoney();

selectData();

Button bt1 = (Button) findViewById(R.id.button1);

bt1.setOnClickListener(new OnClickListener() {

 

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

ShopbuyerActivity.this.finish();

}

});

 

lv1.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

// 根據參數arg2獲取當前位置的數據（行），並根據key獲取對應的value

@SuppressWarnings("unchecked")

Map<String, Object> map = (Map<String, Object>) lv1.getItemAtPosition(arg2);

tv.setText(map.get("shopname").toString());

shopname = map.get("shopname").toString();

}

});

 

}

 

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.buyer_check_shop, menu);

return true;

}

 

private void selectData() {

String sql = "select g.shopname,g.shopprice,bd.buyshopnum,g.shopseller from buyer_goods as bd,goods as g where bd.buyerid='"

+ userId + "' and bd.shopname=g.shopname";

Cursor cursor = mSQLiteDatabase.rawQuery(sql, null);

if (cursor != null) {

// 定義存儲查詢結果的List，每一行數據類型爲Map<String, Object>，其中String表明列名，Object爲值

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

Map<String, Object> map;

// 遍歷遊標對象，每一行獲取的數據存放到Map<String, Object>類型的變量map中

while (cursor.moveToNext()) {

map = new HashMap<String, Object>();

map.put("shopname", cursor.getString(cursor.getColumnIndex("shopname")));

map.put("shopprice", cursor.getInt(cursor.getColumnIndex("shopprice")));

map.put("buyshopnum", cursor.getInt(cursor.getColumnIndex("buyshopnum")));

map.put("shopseller", cursor.getString(cursor.getColumnIndex("shopseller")));

list.add(map);

}

// 建立Adapter，並於ListView綁定

SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.buyer_myshop,

new String[] { "shopname", "shopprice", "buyshopnum", "shopseller" },

new int[] { R.id.tv_buyer_myshopname, R.id.tv_buyer_myshopprice, R.id.tv_buyer_myshopnum,

R.id.tv_buyer_mysellername });

lv1.setAdapter(adapter);

}

}

 

private void selectBuyermoney() {

String sql = "select usermoney from user where userid='" + userId + "'";

// 得到查詢結果對應的遊標對象

Cursor cursor = mSQLiteDatabase.rawQuery(sql, null);

if (cursor != null) {

// 定義存儲查詢結果的List，每一行數據類型爲Map<String, Object>，其中String表明列名，Object爲值

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

Map<String, Object> map;

while (cursor.moveToNext()) {

map = new HashMap<String, Object>();

map.put("usermoney", cursor.getInt(cursor.getColumnIndex("usermoney")));

list.add(map);

}

// 建立Adapter，並於ListView綁定

SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.buyer_money2, new String[] { "usermoney" },

new int[] { R.id.tv_buyer_money2 });

lv2.setAdapter(adapter);

 

}

 

}

 

}

商品購買類：

package com.example.shopcenter;

 

 

 

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.os.Bundle;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.content.Intent;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.AdapterView;

import android.widget.Button;

import android.widget.EditText;

import android.widget.ListView;

import android.widget.SimpleAdapter;

import android.widget.TextView;

import android.widget.Toast;

import android.widget.AdapterView.OnItemClickListener;

 

 

 

 

@SuppressLint("ShowToast")

public class ShopbSelectActivity extends Activity  {

private SQLiteDatabase mSQLiteDatabase = null;

//數據庫名稱

private static final String DATABASE_NAME = "test.db";

private TextView tv;

private ListView lv1,lv2;

private Button btn_selectshop,btn_myshop,btn_addmoney;

private String userId;

private String shopprice;

EditText edt_addmoney,edt_buy_shopnum;

int buy_shopnum;

int buyermoney;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_buyer_select_shop);

Intent i = this.getIntent();

Bundle b = i.getBundleExtra("data");

userId = b.getString("user");

tv = (TextView)this.findViewById(R.id.tv_buyer_selectshopname);

lv2 = (ListView) this.findViewById(R.id.lv_buyer_money);

lv1 = (ListView) this.findViewById(R.id.lv_buyer_shop);

 

lv1.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,

long arg3) {

@SuppressWarnings("unchecked")

Map<String, Object> map = (Map<String, Object>) lv1

.getItemAtPosition(arg2);

tv.setText(map.get("shopname").toString());

 shopprice=map.get("shopprice").toString();

}

});

try {

mSQLiteDatabase = this.openOrCreateDatabase(DATABASE_NAME,

Activity.MODE_PRIVATE, null);

} catch (Exception ex) {

Toast.makeText(this, "打開或建立數據庫異常:" + ex.getMessage(), 2000).show();

}

selectData();

selectBuyermoney();

edt_buy_shopnum=(EditText)this.findViewById(R.id.edittext_buy_shopnum);

btn_selectshop =  (Button)this.findViewById(R.id.button_buyer_selectshop);

btn_selectshop.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

String shopname = tv.getText().toString();

 buy_shopnum=Integer.parseInt(edt_buy_shopnum.getText().toString());

int price=Integer.parseInt(shopprice);

int total_price=buy_shopnum*price;

try {

 String a="select usermoney from user  where userid='"+userId+"' " ;

Cursor cursor = mSQLiteDatabase.rawQuery(a, null);

while (cursor.moveToNext()) {

 buyermoney= cursor.getInt(cursor.getColumnIndex("usermoney"));

 

}

 

 

if(buyermoney>=total_price){

 

String sql = "update goods set shopnum=shopnum-"+buy_shopnum+" where shopname='"+shopname+"' " ;

mSQLiteDatabase.execSQL(sql);

sql="update user set usermoney=usermoney-"+total_price+" where userid='"+userId+"'";

mSQLiteDatabase.execSQL(sql);

 sql = "insert into buyer_goods(buyerid,shopname,buyshopnum) values('" + userId + "','"

+ shopname + "','"+buy_shopnum+"')";

mSQLiteDatabase.execSQL(sql);

 

Toast.makeText(ShopbSelectActivity.this, "購買成功!",

1000).show();

Intent i = new Intent(ShopbSelectActivity.this,

ShopbSelectActivity.class);

 Bundle b = new Bundle();

 b.putString("user", userId);

i.putExtra("data", b);

startActivity(i);

}

else {Toast.makeText(ShopbSelectActivity.this, "餘額不足，請充值!",

3000).show();}

} catch (Exception e) {

Toast.makeText(ShopbSelectActivity.this,

"添加商品異常!" + e.getMessage(), 1000).show();

}

 

}

});

btn_myshop=  (Button)this.findViewById(R.id.button_buyer_myshop);

btn_myshop.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Intent i = new Intent(ShopbSelectActivity.this,

ShopbuyerActivity.class);

 Bundle b = new Bundle();       //發送數據

 b.putString("user", userId);

i.putExtra("data", b);

startActivity(i);

}

});

edt_addmoney=(EditText)this.findViewById(R.id.edittext_addmoney);

btn_addmoney=  (Button)this.findViewById(R.id.button_addmoney);

btn_addmoney.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

String addmoney=edt_addmoney.getText().toString();

String sql = "update user set usermoney=usermoney+"+addmoney+"  where userid='"+userId+"' " ;

mSQLiteDatabase.execSQL(sql);

Toast.makeText(ShopbSelectActivity.this, "成功充值"+addmoney+"元!",

1000).show();

Intent i = new Intent(ShopbSelectActivity.this,

ShopbSelectActivity.class);

 Bundle b = new Bundle();

 b.putString("user", userId);

i.putExtra("data", b);

startActivity(i);

}

});

}

 

 

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.buyer_select_shop, menu);

return true;

}

 

private void selectData() {

String sql = "select * from goods ";

//得到查詢結果對應的遊標對象

Cursor cursor = mSQLiteDatabase.rawQuery(sql, null);

if (cursor != null) {

//定義存儲查詢結果的List，每一行數據類型爲Map<String, Object>，其中String表明列名，Object爲值

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

Map<String, Object> map;

        //遍歷遊標對象，每一行獲取的數據存放到Map<String, Object>類型的變量map中

while (cursor.moveToNext()) {

map = new HashMap<String, Object>();

map.put("shopname", cursor.getString(cursor.getColumnIndex("shopname")));

map.put("shopintro", cursor.getString(cursor.getColumnIndex("shopintro")));

map.put("shopprice", cursor.getInt(cursor.getColumnIndex("shopprice")));

map.put("shopnum", cursor.getString(cursor.getColumnIndex("shopnum")));

map.put("shopseller", cursor.getString(cursor.getColumnIndex("shopseller")));

list.add(map);

}

        //建立Adapter，並於ListView綁定

SimpleAdapter adapter = new SimpleAdapter(this, list,

R.layout.buyer_shop, new String[] { "shopname","shopintro", "shopprice",

"shopnum","shopseller"}, new int[] { R.id.tv_buyer_myshopname,R.id.tv_buyer_myshopintro, R.id.tv_buyer_myshopprice,

R.id.tv_buyer_shopnum ,R.id.tv_buyer_sellername});

lv1.setAdapter(adapter);

}

}

private void selectBuyermoney(){

String sql = "select usermoney from user where userid='"+userId+"'";

//得到查詢結果對應的遊標對象

Cursor cursor = mSQLiteDatabase.rawQuery(sql, null);

if (cursor != null) {

//定義存儲查詢結果的List，每一行數據類型爲Map<String, Object>，其中String表明列名，Object爲值

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

Map<String, Object> map;

while (cursor.moveToNext()) {

map = new HashMap<String, Object>();

map.put("usermoney", cursor.getInt(cursor.getColumnIndex("usermoney")));

list.add(map);

}

        //建立Adapter，並於ListView綁定

SimpleAdapter adapter = new SimpleAdapter(this, list,

R.layout.buyer_money, new String[] { "usermoney"}, new int[] { R.id.tv_buyer_money});

lv2.setAdapter(adapter);

    

 

 

}

 

}

 

 

 

 

}

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