【安卓大作業】Android Studio圖書管理系統 聽雨軒

一、界面展示

二、功能介紹
登陸注冊，借閱圖書、收藏圖書、修改個人信息、錢包充值、退出登錄

三、關鍵代碼展示
（1）database

public class DbHelper extends SQLiteOpenHelper {private static final String SQL_BOOK= "create table if not exists "+Constants.TABLE_NAME_BOOK+"(" +"number INTEGER NOT NULL primary key autoincrement," +"type varchar(50) NOT NULL," +"price float NOT NULL," +"public_com varchar(50) DEFAULT '聽雨喧出版社'," +"count int(11) NOT NULL," +"name varchar(50) NOT NULL," +"cover varchar(50) DEFAULT NULL," +"introduce varchar(128) DEFAULT NULL," +"look_number int(11) default 0," +"star_number int(11) default 0," +"brow_number int(11) default 0" +")";private static final String SQL_USER= "create table if not exists "+Constants.TABLE_NAME_USER+"(" +"id INTEGER NOT NULL primary key autoincrement," +"type int(11) DEFAULT 1," +"sex varchar(5) DEFAULT NULL," +"major varchar(100) DEFAULT NULL," +"classnum int(11) DEFAULT NULL," +"name varchar(50) NOT NULL unique," +"cover varchar(128) DEFAULT NULL," +"age int(11) DEFAULT 0," +"phone int(11) DEFAULT 0," +"jointime datetime DEFAULT NULL," +"email int(11) DEFAULT 0," +"password varchar(50) not null"+")";private static final String SQL_OUT_BOOK= "create table if not exists "+Constants.TABLE_NAME_OUT_BOOK+"(" +"id INTEGER primary key autoincrement," +"outtime varchar(100) not null," +"userid int(11) not null," +"bookname varchar(51) not null," +"duration int(11) default 30," +"state int(11) default 0" +")";private static final String SQL_FAVIOR_BOOK= "create table if not exists "+Constants.TABLE_NAME_FAVOR+"(" +"id INTEGER primary key autoincrement," +"time varchar(100) not null," +"userid int(11) not null," +"bookname varchar(51) not null," +"state int(11) default 1" +")";private static final String SQL_OPERATION = "create table if not exists "+Constants.TABLE_NAME_RECORD_OPERATION+"(" +"id INTEGER primary key autoincrement," +"operation varchar(128) not null," +"username varchar(51) not null," +"time varchar(100) not null" +")";public DbHelper(Context context){super(context,"tingyuxuan.db",null,1);}public DbHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {super(context, name, factory, version);}@Overridepublic void onCreate(SQLiteDatabase sqLiteDatabase) {//創建表sqLiteDatabase.execSQL(SQL_BOOK);sqLiteDatabase.execSQL(SQL_USER);sqLiteDatabase.execSQL(SQL_OUT_BOOK);sqLiteDatabase.execSQL(SQL_OPERATION);sqLiteDatabase.execSQL(SQL_FAVIOR_BOOK);System.out.println("數據庫創建成功");}@Overridepublic void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {}public void addUser(String name,String pwd,String email,int type){SQLiteDatabase db = this.getWritableDatabase();ContentValues values = new ContentValues();values.put("name",name);values.put("password",pwd);values.put("email",email);values.put("type",type);db.insert("user",null,values);values.clear();db.close();}public int getUserLevl(String name){SQLiteDatabase db = this.getWritableDatabase();Cursor cursor = db.rawQuery("select type from user where name='" + name + "'", null);cursor.moveToLast();int type=0;try{type= cursor.getInt(cursor.getColumnIndex("type"));}catch (SQLException e){e.printStackTrace();}finally {db.close();return type;}}public String getUserName(int id){SQLiteDatabase db = this.getWritableDatabase();Cursor cursor = db.rawQuery("select name from user where id='" + id + "'", null);cursor.moveToLast();String name="";try{name= cursor.getString(cursor.getColumnIndex("name"));}catch (SQLException e){e.printStackTrace();}finally {db.close();return name;}}//獲取用戶的idpublic int getUserId(String name){SQLiteDatabase db = this.getWritableDatabase();Cursor cursor = db.rawQuery("select id from user where name='" + name + "'", null);cursor.moveToLast();int type=0;try{type= cursor.getInt(cursor.getColumnIndex("id"));}catch (SQLException e){e.printStackTrace();}finally {db.close();return type;}}public String getBookName(int id){SQLiteDatabase db = this.getWritableDatabase();Cursor cursor = db.rawQuery("select name from book where id=" + id , null);cursor.moveToLast();String nmae="";try{nmae= cursor.getString(cursor.getColumnIndex("name"));}catch (SQLException e){e.printStackTrace();}finally {db.close();return nmae;}}public List<BookBean> getAllBooks(){List<BookBean> books = new ArrayList<>();SQLiteDatabase db = this.getWritableDatabase();//查詢Book表中的所有數據Cursor cursor = db.query("book", null, null, null, null, null, "number desc", null);//遍歷Curosr對象，取出數據并打印while (cursor.moveToNext()) {BookBean book = new BookBean();String name = cursor.getString(cursor.getColumnIndex("name"));String introduce = cursor.getString(cursor.getColumnIndex("introduce"));String pub = cursor.getString(cursor.getColumnIndex("public_com"));String type = cursor.getString(cursor.getColumnIndex("type"));int count = cursor.getInt(cursor.getColumnIndex("count"));int look_number = cursor.getInt(cursor.getColumnIndex("look_number"));int star_number = cursor.getInt(cursor.getColumnIndex("star_number"));int price = cursor.getInt(cursor.getColumnIndex("price"));int id = cursor.getInt(cursor.getColumnIndex("number"));book.setNumber(id);book.setName(name);book.setPublic_com(pub);book.setLook_number(look_number);book.setStar_number(star_number);book.setIntroduce(introduce);book.setCount(count);book.setPrice(price);book.setType(type);books.add(book);}//關閉Cursorcursor.close();db.close();return books;}public void addBook(BookBean book){SQLiteDatabase db = this.getReadableDatabase();ContentValues values = new ContentValues();values.put("name",book.getName());values.put("price",book.getPrice());values.put("count",book.getCount());values.put("introduce","這是有關："+book.getName()+"的介紹");values.put("type",book.getType());long book1 = db.insert("book", null, values);System.out.println("-=-----book1---添加一本-"+book1);values.clear();db.close();}public void addBooks(){SQLiteDatabase db = this.getReadableDatabase();ContentValues values = new ContentValues();Random random = new Random();String bookName = Constants.getBookName(random.nextInt(100));values.put("name", bookName);values.put("price",random.nextInt(90)/2);values.put("count",random.nextInt(40));values.put("introduce","這是有關："+bookName+"的介紹");values.put("type","文學");db.insert("book",null,values);values.clear();db.close();}public void addDefaultData(){SQLiteDatabase db = this.getWritableDatabase();ContentValues values = new ContentValues();for(int i=1;i<11;i++){Random random = new Random();int index = random.nextInt(100);String bookName = Constants.getBookName(index);values.put("type","文學類");values.put("price",i+index);values.put("star_number",0);values.put("public_com","聽雨軒出版社");values.put("count",20+i);values.put("name",bookName+"傳");values.put("introduce","介紹："+bookName);try {long book = db.insert("book", null, values);}catch (SQLException e){e.printStackTrace();}finally {values.clear();}}db.close();}public void addToMyBorreow(String username,String bookName) {SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");// HH:mm:ss //獲取當前時間Date date = new Date(System.currentTimeMillis());String time = simpleDateFormat.format(date);int userId = getUserId(username);SQLiteDatabase db = this.getReadableDatabase();ContentValues values = new ContentValues();values.put("userid",userId);values.put("bookname",bookName);values.put("outtime",time);try{db.insert("outbook",null,values);}catch (SQLException e){e.printStackTrace();}finally {values.clear();db.close();}}public void getUserBorrows(String name){String sql = "select j.outtime,b.name,j.duration from outbook j,book b,user u where u.name='"+name+"' and u.id=j.userid and b.number=j.bookid ";SQLiteDatabase db = this.getWritableDatabase();Cursor cursor = db.rawQuery(sql, null); // db.query()while(cursor.moveToNext()){String outtime = cursor.getString(cursor.getColumnIndex("outtime"));String name2 = cursor.getString(cursor.getColumnIndex("name"));int duration = cursor.getInt(cursor.getColumnIndex("duration"));}}public void selectAllBorrow(String name){List<BorrowBean> books = new ArrayList<>();int userId = getUserId(name);SQLiteDatabase db = this.getReadableDatabase();Cursor cursor = db.query("outbook", null, null, null, null, null, null);while (cursor.moveToNext()){int id = cursor.getInt(cursor.getColumnIndex("userid"));if(userId == id){BorrowBean bean = new BorrowBean();String outtime = cursor.getString(cursor.getColumnIndex("outtime"));String name2 = cursor.getString(cursor.getColumnIndex("name"));bean.setTime(outtime);bean.setName(name2);System.out.println("------------------"+outtime+"---"+name2);}}}public List<UserBean> getAllUsers(){List<UserBean> users = new ArrayList<>();SQLiteDatabase db = this.getWritableDatabase(); // Cursor cursor = db.query("user", null, null, null, null, null, null);Cursor cursor = db.rawQuery("select * from user order by id desc", null);while(cursor.moveToNext()){int id = cursor.getInt(cursor.getColumnIndex("id"));int type = cursor.getInt(cursor.getColumnIndex("type"));String name = cursor.getString(cursor.getColumnIndex("name"));String sex = cursor.getString(cursor.getColumnIndex("sex"));String major = cursor.getString(cursor.getColumnIndex("major"));String email = cursor.getString(cursor.getColumnIndex("email"));String pwd = cursor.getString(cursor.getColumnIndex("password"));UserBean bean = new UserBean();bean.setType(type);bean.setPassword(pwd);bean.setId(id);bean.setMajor(major);bean.setSex(sex);bean.setEmail(email);bean.setName(name);users.add(bean);}cursor.close();db.close();return users;} }

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