基于Android平台的图书管理系统的制作（2）

时间：2018-09-14 20:38:39 阅读：271 评论：0 收藏：0 [点我收藏+]

标签：equal extend audio activity close == weight lin als

上一篇讲解了制作图书管理系统的初衷与要求，和app首页的代码。

下面来介绍图书管理系统的服务对象：学生

学生类的设计：

个人信息：账号、密码、姓名、学号、邮箱、年龄。

借阅信息：借阅总数（不超过十本）、借阅书籍的ID（数组）、借阅书籍的日期（数组）。

源码在此：

  1 package com.example.administrator.library1;
  2 
  3 import org.litepal.LitePal;
  4 import org.litepal.crud.DataSupport;
  5 import org.litepal.crud.LitePalSupport;
  6 
  7 import java.util.ArrayList;
  8 import java.util.List;
  9 
 10 public class Student extends LitePalSupport{
 11     private int id;
 12     private String account,name,password,student_ID,mailBox;
 13     private int age,bookAmount;
 14     private int bookList[]=new int[10];
 15     private int bookyear[]=new int[10];
 16     private int bookday[]=new int[10];
 17 
 18     public Student(String account, String password, String name, String student_ID, String mailBox, int age)
 19     {
 20         this.account=account;
 21         this.password=password;
 22         this.name=name;
 23         this.student_ID=student_ID;
 24         this.mailBox=mailBox;
 25         this.age=age;
 26         bookAmount=0;
 27         for(int i=0;i<10;++i)
 28         {
 29             bookList[i]=0;
 30             bookyear[i]=0;
 31             bookday[i]=0;
 32         }
 33     }
 34     public int getId() {
 35         return id;
 36     }
 37     public void setId(int id) {
 38         this.id = id;
 39     }
 40     public void setName(String name) {
 41         this.name = name;
 42     }
 43     public void setAccount(String account) {
 44         this.account = account;
 45     }
 46     public void setAge(int age) {
 47         this.age = age;
 48     }
 49     public void setPassword(String password) {
 50         this.password = password;
 51     }
 52     public void setMailBox(String mailBox) {
 53         this.mailBox = mailBox;
 54     }
 55     public void setStudent_ID(String student_ID) {
 56         this.student_ID = student_ID;
 57     }
 58     public String getName() {
 59         return name;
 60     }
 61     public int getAge() {
 62         return age;
 63     }
 64     public String getAccount() {
 65         return account;
 66     }
 67     public String getPassword() {
 68         return password;
 69     }
 70     public String getStudent_ID() {
 71         return student_ID;
 72     }
 73     public String getMailBox() {
 74         return mailBox;
 75     }
 76     public void setBookList(int[] bookList) {
 77         this.bookList = bookList;
 78     }
 79     public void setBookList(int number,int book_id)
 80     {
 81         this.bookList[number]=book_id;
 82     }
 83     public int[] getBookList() {
 84         return bookList;
 85     }
 86     public int getBookAmount() {
 87         return bookAmount;
 88     }
 89     public void setBookAmount(int bookAmount) {
 90         this.bookAmount = bookAmount;
 91     }
 92     public int getBookList(int number)
 93     {
 94         return bookList[number];
 95     }
 96     public int getBookyear(int number){return bookyear[number];}
 97     public int getBookday(int number){return bookday[number];}
 98     public void setBookyear(int number,int year){this.bookyear[number]=year;}
 99     public void setBookday(int number,int day){this.bookday[number]=day;}
100 
101 }

Student

学生的注册：

注册有个人信息的填写：账号、密码（重复输入）、学号、姓名、邮箱、年龄。

代码如下：

主逻辑：

 1 package com.example.administrator.library1;
 2 
 3 import android.content.Intent;
 4 import android.support.v7.app.AppCompatActivity;
 5 import android.os.Bundle;
 6 import android.view.View;
 7 import android.widget.Button;
 8 import android.widget.EditText;
 9 import android.widget.Toast;
10 
11 import org.litepal.LitePal;
12 
13 import java.util.List;
14 
15 public class Register_student extends AppCompatActivity {
16     private EditText editAccount,editPassword1,editPassword2,editName,editMailbox,editAge,editStudentID;
17     private Button button_commit;
18     @Override
19     protected void onCreate(Bundle savedInstanceState) {
20         super.onCreate(savedInstanceState);
21         setContentView(R.layout.activity_register_student);
22         editAccount=findViewById(R.id.reg_st_acc_id);
23         editPassword1=findViewById(R.id.reg_st_pass1_id);
24         editPassword2=findViewById(R.id.reg_st_pass2_id);
25         editName=findViewById(R.id.reg_st_name_id);
26         editAge=findViewById(R.id.reg_st_age_id);
27         editMailbox=findViewById(R.id.reg_st_mail_id);
28         editStudentID=findViewById(R.id.reg_st_ID_id);
29         button_commit=findViewById(R.id.reg_st_commit_id);
30         button_commit.setOnClickListener(new View.OnClickListener() {
31             @Override
32             public void onClick(View view) {
33                 if(editAccount.getText().toString().equals("")||editPassword1.getText().toString().equals("")||editPassword2.getText().toString().equals("")||editName.getText().toString().equals("")||editAge.getText().toString().equals("")||editMailbox.getText().toString().equals("")||editStudentID.getText().toString().equals(""))
34                 {
35                     Toast.makeText(Register_student.this,"注册信息不能为空",Toast.LENGTH_SHORT);
36                 }
37                 else
38                 {
39                     if(editAccount.getText().toString().length()>=6&&editAccount.getText().toString().length()<=12)
40                     {
41                         List<Student> students_account= LitePal.findAll(Student.class);
42                         boolean differ=true;
43                         for(int i=0;i<students_account.size();++i)
44                         {
45                             if(editAccount.getText().toString().equals(students_account.get(i).getAccount()))
46                             {
47                                 Toast.makeText(Register_student.this,"账号已存在",Toast.LENGTH_SHORT).show();
48                                 differ=false;
49                             }
50                         }
51                         if(differ==true)
52                         {
53                             if(editPassword2.getText().toString().equals(editPassword1.getText().toString()))
54                             {
55                                 int reg_age=Integer.parseInt(editAge.getText().toString());
56                                 Student student=new Student(editAccount.getText().toString(),editPassword1.getText().toString(),editName.getText().toString(),editStudentID.getText().toString(),editMailbox.getText().toString(),reg_age);
57                                 student.save();
58                                 Intent intent=new Intent(Register_student.this,MainActivity.class);
59                                 startActivity(intent);
60                                 //Toast.makeText(Register_student.this,"注册成功",Toast.LENGTH_SHORT).show();
61                             }
62                             else
63                             {
64                                 Toast.makeText(Register_student.this,"两次密码不相同",Toast.LENGTH_SHORT).show();
65                             }
66                         }
67                     }
68                     else
69                     {
70                         Toast.makeText(Register_student.this,"账号大小需要在6-12位数之间",Toast.LENGTH_SHORT).show();
71                     }
72                 }
73 
74             }
75         });
76     }
77 
78     @Override
79     protected void onPause() {
80         Intent intent=new Intent(Register_student.this,MainActivity.class);
81         startActivity(intent);
82         super.onPause();
83     }
84 }

Student_Register

界面：

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     xmlns:app="http://schemas.android.com/apk/res-auto"
  4     xmlns:tools="http://schemas.android.com/tools"
  5     android:orientation="vertical"
  6     android:layout_width="match_parent"
  7     android:layout_height="match_parent"
  8     tools:context=".Register_student">
  9     <LinearLayout
 10         android:layout_marginTop="20dp"
 11         android:orientation="horizontal"
 12         android:layout_width="match_parent"
 13         android:layout_height="wrap_content">
 14         <TextView
 15             android:layout_width="0dp"
 16             android:layout_height="match_parent"
 17             android:layout_weight="1"
 18             android:text="账号 ："
 19             android:textSize="21sp"/>
 20         <EditText
 21             android:id="@+id/reg_st_acc_id"
 22             android:layout_width="0dp"
 23             android:layout_height="match_parent"
 24             android:inputType="number"
 25             android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890*/@#$%^"
 26             android:layout_weight="3"/>
 27     </LinearLayout>
 28     <LinearLayout
 29         android:orientation="horizontal"
 30         android:layout_width="match_parent"
 31         android:layout_height="wrap_content">
 32         <TextView
 33             android:layout_width="0dp"
 34             android:layout_height="match_parent"
 35             android:layout_weight="1"
 36             android:text="输入密码"
 37             android:textSize="18sp"/>
 38         <EditText
 39             android:id="@+id/reg_st_pass1_id"
 40             android:layout_width="0dp"
 41             android:layout_height="match_parent"
 42             android:inputType="textPassword"
 43             android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890*/@#$%^"
 44             android:layout_weight="3"/>
 45     </LinearLayout>
 46     <LinearLayout
 47         android:orientation="horizontal"
 48         android:layout_width="match_parent"
 49         android:layout_height="wrap_content">
 50         <TextView
 51             android:layout_width="0dp"
 52             android:layout_height="match_parent"
 53             android:layout_weight="1"
 54             android:text="再输入密码"
 55             android:textSize="18sp"/>
 56         <EditText
 57             android:id="@+id/reg_st_pass2_id"
 58             android:layout_width="0dp"
 59             android:layout_height="match_parent"
 60             android:inputType="textPassword"
 61             android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890*/@#$%^"
 62             android:layout_weight="3"/>
 63     </LinearLayout>
 64     <LinearLayout
 65         android:orientation="horizontal"
 66         android:layout_width="match_parent"
 67         android:layout_height="wrap_content">
 68         <TextView
 69             android:layout_width="0dp"
 70             android:layout_height="match_parent"
 71             android:layout_weight="1"
 72             android:text="姓名 ："
 73             android:textSize="21sp"/>
 74         <EditText
 75             android:id="@+id/reg_st_name_id"
 76             android:layout_width="0dp"
 77             android:layout_height="match_parent"
 78             android:layout_weight="3"/>
 79     </LinearLayout>
 80     <LinearLayout
 81         android:orientation="horizontal"
 82         android:layout_width="match_parent"
 83         android:layout_height="wrap_content">
 84         <TextView
 85             android:layout_width="0dp"
 86             android:layout_height="match_parent"
 87             android:layout_weight="1"
 88             android:text="学号 ："
 89             android:textSize="21sp"/>
 90         <EditText
 91             android:id="@+id/reg_st_ID_id"
 92             android:inputType="number"
 93             android:digits="1234567890"
 94             android:layout_width="0dp"
 95             android:layout_height="match_parent"
 96             android:layout_weight="3"/>
 97     </LinearLayout>
 98     <LinearLayout
 99         android:orientation="horizontal"
100         android:layout_width="match_parent"
101         android:layout_height="wrap_content">
102         <TextView
103             android:layout_width="0dp"
104             android:layout_height="match_parent"
105             android:layout_weight="1"
106             android:text="邮箱 ："
107             android:textSize="21sp"/>
108         <EditText
109             android:id="@+id/reg_st_mail_id"
110             android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890@."
111             android:layout_width="0dp"
112             android:inputType="number"
113             android:layout_height="match_parent"
114             android:layout_weight="3"/>
115     </LinearLayout>
116     <LinearLayout
117         android:orientation="horizontal"
118         android:layout_width="match_parent"
119         android:layout_height="wrap_content">
120         <TextView
121             android:layout_width="0dp"
122             android:layout_height="match_parent"
123             android:layout_weight="1"
124             android:text="年龄 ："
125             android:textSize="21sp"/>
126         <EditText
127             android:id="@+id/reg_st_age_id"
128             android:layout_width="0dp"
129             android:layout_height="match_parent"
130             android:layout_weight="3"
131             android:inputType="number"/>
132     </LinearLayout>
133     <Button
134         android:id="@+id/reg_st_commit_id"
135         android:layout_width="150dp"
136         android:layout_height="wrap_content"
137         android:textSize="24sp"
138         android:layout_gravity="center"
139         android:gravity="center"
140         android:text="注册提交"/>
141 </LinearLayout>

Studnet_register_xml

界面很丑，截图如下：

技术分享图片

注册成功之后，将会使用开源项目Litepal将Edittext里的内容储存至本地数据库。Intent将活动带回MainActivity。

学生的登录：

使用账号密码登录，记住密码自动开启，并将账号和密码通过Simple类储存至Library数据库Simple表的第一列，登录开始时，会自动先访问Simple表ID为1的simple获得数据，登陆成功后进入Student homepage。

逻辑代码：

 1 package com.example.administrator.library1;
 2 
 3 import android.content.Intent;
 4 import android.support.v7.app.AppCompatActivity;
 5 import android.os.Bundle;
 6 import android.util.Log;
 7 import android.view.View;
 8 import android.widget.Button;
 9 import android.widget.CheckBox;
10 import android.widget.EditText;
11 import android.widget.Toast;
12 
13 import org.litepal.LitePal;
14 import org.litepal.crud.LitePalSupport;
15 
16 import java.util.List;
17 
18 public class Login_student extends AppCompatActivity {
19 
20     private EditText editAccount,editPassword;
21     private CheckBox checkBox;
22     private Button button_commit;
23     @Override
24     protected void onCreate(Bundle savedInstanceState) {
25         super.onCreate(savedInstanceState);
26         setContentView(R.layout.activity_login_student);
27         editAccount=findViewById(R.id.accountStudent_id);
28         editPassword=findViewById(R.id.passwordStudent_id);
29         checkBox=findViewById(R.id.rememberPassStudent_id);
30         button_commit=findViewById(R.id.commitStudent_id);
31 
32         //自动登录功能
33         final Simple simple=LitePal.find(Simple.class,1);
34         editAccount.setText(simple.getAccount());
35         editPassword.setText(simple.getPassword());
36 
37         button_commit.setOnClickListener(new View.OnClickListener() {
38             @Override
39             public void onClick(View view) {                  //在这里之前已经出错
40                 List<Student> students_account= LitePal.findAll(Student.class);
41                 boolean is_account_available=false;
42                 String st_account,st_password;
43                 st_account=editAccount.getText().toString();
44                 st_password=editPassword.getText().toString();
45                 for(int i=0;i<students_account.size();++i)
46                 {
47                     if(st_account.equals(students_account.get(i).getAccount()))
48                     {
49                         is_account_available=true;
50                         if(st_password.equals(students_account.get(i).getPassword()))
51                         {
52                             if(checkBox.isChecked())
53                             {
54                                 Simple simple= LitePal.find(Simple.class,1);
55                                 simple.setAccount(editAccount.getText().toString());
56                                 simple.setPassword(editPassword.getText().toString());
57                                 simple.save();
58                             }
59                             else
60                             {
61                                 Simple simple1=LitePal.find(Simple.class,1);
62                                 simple1.setAccount("");
63                                 simple1.setPassword("");
64                                 simple1.save();
65                             }
66                             Intent intent=new Intent(Login_student.this,Student_homepage.class);
67                             intent.putExtra("extra_data",i+1);
68                             startActivity(intent);
69                             finish();
70                         }
71                         else
72                         {
73                             Toast.makeText(Login_student.this,"密码错误",Toast.LENGTH_SHORT).show();
74                             break;                           //记住密码还没有用上
75                         }
76                     }
77                 }
78                 if(is_account_available==false)
79                 {
80                     Toast.makeText(Login_student.this,"账号不存在",Toast.LENGTH_SHORT).show();
81                 }
82             }
83 
84         });
85     }
86 }

界面代码：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:app="http://schemas.android.com/apk/res-auto"
 4     android:orientation="vertical"
 5     xmlns:tools="http://schemas.android.com/tools"
 6     android:layout_width="match_parent"
 7     android:layout_height="match_parent"
 8     tools:context=".Login_student">
 9 
10     <ImageView
11         android:layout_width="match_parent"
12         android:layout_height="211dp"
13         android:src="@drawable/img_login" />
14     <LinearLayout
15         android:layout_width="match_parent"
16         android:layout_height="wrap_content"
17         android:layout_marginTop="20dp"
18         android:layout_marginLeft="20dp"
19         android:layout_marginRight="20dp"
20         android:orientation="horizontal">
21         <TextView
22             android:layout_width="0dp"
23             android:layout_height="match_parent"
24             android:layout_weight="1"
25             android:textSize="21sp"
26             android:text="账号： "/>
27         <EditText
28             android:id="@+id/accountStudent_id"
29             android:layout_width="0dp"
30             android:layout_height="match_parent"
31             android:layout_weight="5"
32             android:hint="type here"/>
33     </LinearLayout>
34     <LinearLayout
35         android:orientation="horizontal"
36         android:layout_width="match_parent"
37         android:layout_marginLeft="20dp"
38         android:layout_marginRight="20dp"
39         android:layout_height="wrap_content">
40         <TextView
41             android:layout_width="0dp"
42             android:layout_height="match_parent"
43             android:layout_weight="1"
44             android:textSize="21sp"
45             android:text="密码 :"/>
46         <EditText
47             android:id="@+id/passwordStudent_id"
48             android:layout_width="0dp"
49             android:layout_height="match_parent"
50             android:layout_weight="5"
51             android:hint="type here"/>
52     </LinearLayout>
53     <LinearLayout
54         android:layout_marginLeft="20dp"
55         android:layout_marginRight="20dp"
56         android:layout_width="match_parent"
57         android:layout_height="wrap_content">
58         <CheckBox
59             android:id="@+id/rememberPassStudent_id"
60             android:checked="true"
61             android:layout_width="wrap_content"
62             android:layout_height="wrap_content" />
63         <TextView
64             android:layout_width="wrap_content"
65             android:layout_height="wrap_content"
66             android:textSize="18sp"
67             android:text="自动登录"/>
68     </LinearLayout>
69     <Button
70         android:id="@+id/commitStudent_id"
71         android:layout_width="150dp"
72         android:layout_height="wrap_content"
73         android:layout_gravity="center"
74         android:textSize="20sp"
75         android:text="登录"/>
76 </LinearLayout>

Login_student.xml

技术分享图片

学生空间：

学生空间包含的功能有：查询书籍、借书和还书。通过在数据库Book表中查询用户输入的书籍名称达到查询目的，查询成功后书籍出现，此时用户点击借阅即可借走该书，学生空间下面有listview控件，用来展示学生已经借阅未归还的书籍。用户点击listview里的书籍后，该书从listview中消失，用户账号里的bookamount-1，id[],data[],中关于该书的信息消失。

界面源码：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:app="http://schemas.android.com/apk/res-auto"
 4     xmlns:tools="http://schemas.android.com/tools"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent"
 7     android:orientation="vertical"
 8     tools:context=".Student_homepage">
 9 
10     <ImageView
11         android:layout_width="match_parent"
12         android:layout_height="160dp"
13         android:src="@drawable/img_1" />
14     <TextView
15         android:id="@+id/stu_home_infor_id"
16         android:layout_width="match_parent"
17         android:layout_height="wrap_content"
18         android:textSize="20sp"/>
19     <LinearLayout
20         android:layout_marginTop="20dp"
21         android:layout_width="match_parent"
22         android:layout_height="wrap_content"
23         android:orientation="horizontal">
24         <Button
25             android:id="@+id/stu_home_ser_id"
26             android:layout_width="wrap_content"
27             android:layout_height="wrap_content"
28             android:text="搜索"
29             android:textSize="18sp"/>
30         <EditText
31             android:id="@+id/stu_home_ser_content_id"
32             android:layout_width="0dp"
33             android:layout_height="wrap_content"
34             android:layout_weight="1"
35             android:hint="输入书名或者作者"/>
36     </LinearLayout>
37     <LinearLayout
38         android:id="@+id/stu_linear_id"
39         android:visibility="invisible"
40         android:orientation="horizontal"
41         android:layout_width="match_parent"
42         android:layout_height="wrap_content">
43         <TextView
44             android:id="@+id/stu_home_book_id"
45             android:layout_width="0dp"
46             android:layout_height="wrap_content"
47             android:layout_weight="4"/>
48         <Button
49             android:id="@+id/stu_home_borrow_id"
50             android:layout_width="0dp"
51             android:layout_height="wrap_content"
52             android:layout_weight="1"
53             android:text="借阅"
54             android:textSize="20sp"/>
55     </LinearLayout>
56     <ListView
57         android:id="@+id/st_home_list_id"
58         android:layout_width="match_parent"
59         android:layout_height="match_parent">
60     </ListView>
61 
62 
63 </LinearLayout>

Student_homepage_xml

逻辑代码：

  1 package com.example.administrator.library1;
  2 
  3 import android.content.Intent;
  4 import android.support.v7.app.AppCompatActivity;
  5 import android.os.Bundle;
  6 import android.support.v7.widget.LinearLayoutManager;
  7 import android.support.v7.widget.RecyclerView;
  8 import android.view.View;
  9 import android.widget.Adapter;
 10 import android.widget.AdapterView;
 11 import android.widget.ArrayAdapter;
 12 import android.widget.Button;
 13 import android.widget.EditText;
 14 import android.widget.LinearLayout;
 15 import android.widget.ListView;
 16 import android.widget.TextView;
 17 import android.widget.Toast;
 18 
 19 import org.litepal.LitePal;
 20 
 21 import java.sql.Time;
 22 import java.util.ArrayList;
 23 import java.util.Calendar;
 24 import java.util.List;
 25 
 26 import static android.media.CamcorderProfile.get;//
 27 //应该是书的数据没有存进去。
 28 
 29 public class Student_homepage extends AppCompatActivity {
 30     private int book_id[]=new int[10];
 31     Student student_local;
 32     private List<String> bookList=new ArrayList<>();
 33     private Book book_in_search,book_in_delete;
 34     int student_id;
 35     boolean key=false;
 36     private TextView text_student_infor,text_book_infor;
 37     private Button search,borrow;
 38     private EditText search_content;
 39     private LinearLayout linearLayout;
 40     @Override
 41     protected void onCreate(Bundle savedInstanceState) {
 42         super.onCreate(savedInstanceState);
 43         setContentView(R.layout.activity_student_homepage);
 44 
 45         for(int i=0;i<10;++i)
 46         {
 47             book_id[i]=0;
 48         }
 49 
 50         linearLayout=(LinearLayout)findViewById(R.id.stu_linear_id);
 51         text_student_infor=(TextView)findViewById(R.id.stu_home_infor_id);
 52         search_content=(EditText) findViewById(R.id.stu_home_ser_content_id);
 53         text_book_infor=(TextView)findViewById(R.id.stu_home_book_id);
 54         borrow=(Button)findViewById(R.id.stu_home_borrow_id);
 55         search=(Button)findViewById(R.id.stu_home_ser_id);                     //注册控件
 56 
 57         Intent intent=getIntent();                                             //获得上一个活动的数据
 58         student_id=intent.getIntExtra("extra_data",1);
 59         student_local=LitePal.find(Student.class,student_id);
 60         text_student_infor.setText("学号："+student_local.getStudent_ID()+"     "+"姓名："+student_local.getName());
 61 
 62         for(int i=0;i<student_local.getBookAmount();++i)
 63         {
 64             bookList.add(LitePal.find(Book.class,student_local.getBookList(i)).getName());
 65             book_id[i]=student_local.getBookList(i);
 66         }
 67 
 68         final ListView listView=(ListView) findViewById(R.id.st_home_list_id);
 69         final ArrayAdapter<String> adapter=new ArrayAdapter<String>(Student_homepage.this,android.R.layout.simple_list_item_1,bookList);
 70         listView.setAdapter(adapter);                                      //制作listview滚动
 71 
 72         listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
 73             @Override
 74             public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
 75                 String string = bookList.get(i);
 76                 Toast.makeText(Student_homepage.this, string+"归还成功", Toast.LENGTH_SHORT).show();
 77                 bookList.remove(i);
 78                 for (int key = i; key < student_local.getBookAmount() - 1; ++key) {
 79                     book_id[key] = book_id[key + 1];
 80                 }
 81                 student_local.setBookAmount(student_local.getBookAmount() - 1);
 82                 student_local.setBookList(book_id);
 83                 student_local.save();
 84                 //List<Book> books = LitePal.where("name like ?", string).find(Book.class);
 85                 book_in_delete=LitePal.find(Book.class,book_id[i]);
 86                 int current_book = book_in_delete.getIn_shelf();
 87                 book_in_delete.setIn_shelf(current_book + 1);
 88                 book_in_delete.save();
 89 
 90                 listView.setAdapter(adapter);
 91             }
 92         });
 93 
 94         search.setOnClickListener(new View.OnClickListener() {
 95             @Override
 96             public void onClick(View view) {
 97                 String sear_book_name;
 98                 sear_book_name=search_content.getText().toString();
 99                 List<Book> books=LitePal.where("name like ?",sear_book_name).find(Book.class);
100                 if(books.size()>0) {
101                     book_in_search = books.get(0);
102                     text_book_infor.setText("书名:" + book_in_search.getName() + "     " + "作者:" + book_in_search.getWriter());
103                     linearLayout.setVisibility(View.VISIBLE);
104                     key=true;
105                 }
106             }
107         });
108         borrow.setOnClickListener(new View.OnClickListener() {
109             @Override
110             public void onClick(View view) {
111                 if (book_in_search.getIn_shelf() > 0&&key==true) {
112                     key=false;
113                     if (student_local.getBookAmount() < 10) {
114                         book_in_search.setIn_shelf(book_in_search.getIn_shelf() - 1);
115                         book_in_search.save();
116                         book_id[student_local.getBookAmount()] = book_in_search.getId();
117                         bookList.add(book_in_search.getName());
118 
119                         Calendar calendar=Calendar.getInstance();
120                         int year=calendar.get(Calendar.YEAR);
121                         int day=calendar.get(Calendar.DAY_OF_YEAR);                               //获得当前的时间
122 
123                         student_local.setBookList(student_local.getBookAmount(),book_in_search.getId());
124                         student_local.setBookyear(student_local.getBookAmount(),year);
125                         student_local.setBookday(student_local.getBookAmount(),day);
126                         student_local.setBookAmount(student_local.getBookAmount()+1);
127                         student_local.save();
128                         listView.setAdapter(adapter);
129                         Toast.makeText(Student_homepage.this, "借书成功", Toast.LENGTH_SHORT).show();
130                     } else {
131                         Toast.makeText(Student_homepage.this, "借书数目已达到上限，请还书后再借", Toast.LENGTH_SHORT).show();
132                     }
133                 } else {
134                     Toast.makeText(Student_homepage.this, "该书已经全部被借出", Toast.LENGTH_SHORT).show();
135                 }
136             }
137         });
138 
139     }
140 }

Student_Homepage

截图如下：

下一篇再来讲述Book与staff（工作人员）这两部分的实现。

基于Android平台的图书管理系统的制作（2）

标签：equal extend audio activity close == weight lin als

原文地址：https://www.cnblogs.com/Gzxjt/p/9648532.html

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