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【安卓大作业】Android Studio学校图书管理系统
一、界面展示
二、功能介绍
图书馆介绍、查看上架新书、借阅排行榜
学生端、图书借阅、管理员端、图书管理等
三、项目结构
四、关键代码展示
(1)student_homepage
package com.example.administrator.library1;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import org.litepal.LitePal;
import java.sql.Time;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import static android.media.CamcorderProfile.get;//
//应该是书的数据没有存进去。
public class Student_homepage extends AppCompatActivity {
private int book_id[]=new int[10];
Student student_local;
private List<String> bookList=new ArrayList<>();
private Book book_in_search,book_in_delete;
int student_id;
boolean key=false;
private TextView text_student_infor,text_book_infor;
private Button search,borrow;
private EditText search_content;
private LinearLayout linearLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_student_homepage);
for(int i=0;i<10;++i)
{
book_id[i]=0;
}
linearLayout=(LinearLayout)findViewById(R.id.stu_linear_id);
text_student_infor=(TextView)findViewById(R.id.stu_home_infor_id);
search_content=(EditText) findViewById(R.id.stu_home_ser_content_id);
text_book_infor=(TextView)findViewById(R.id.stu_home_book_id);
borrow=(Button)findViewById(R.id.stu_home_borrow_id);
search=(Button)findViewById(R.id.stu_home_ser_id); //注册控件
Intent intent=getIntent(); //获得上一个活动的数据
student_id=intent.getIntExtra("extra_data",1);
student_local=LitePal.find(Student.class,student_id);
text_student_infor.setText("学号:"+student_local.getStudent_ID()+" "+"姓名:"+student_local.getName());
for(int i=0;i<student_local.getBookAmount();++i)
{
bookList.add(LitePal.find(Book.class,student_local.getBookList(i)).getName());
book_id[i]=student_local.getBookList(i);
}
final ListView listView=(ListView) findViewById(R.id.st_home_list_id);
final ArrayAdapter<String> adapter=new ArrayAdapter<String>(Student_homepage.this,android.R.layout.simple_list_item_1,bookList);
listView.setAdapter(adapter); //制作listview滚动
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
String string = bookList.get(i);
Toast.makeText(Student_homepage.this, string+"归还成功", Toast.LENGTH_SHORT).show();
bookList.remove(i);
for (int key = i; key < student_local.getBookAmount() - 1; ++key) {
book_id[key] = book_id[key + 1];
}
student_local.setBookAmount(student_local.getBookAmount() - 1);
student_local.setBookList(book_id);
student_local.save();
//List<Book> books = LitePal.where("name like ?", string).find(Book.class);
book_in_delete=LitePal.find(Book.class,book_id[i]);
int current_book = book_in_delete.getIn_shelf();
book_in_delete.setIn_shelf(current_book + 1);
book_in_delete.save();
listView.setAdapter(adapter);
}
});
search.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String sear_book_name;
sear_book_name=search_content.getText().toString();
List<Book> books=LitePal.where("name like ?",sear_book_name).find(Book.class);
if(books.size()>0) {
book_in_search = books.get(0);
text_book_infor.setText("书名:" + book_in_search.getName() + " " + "作者:" + book_in_search.getWriter());
linearLayout.setVisibility(View.VISIBLE);
key=true;
}
}
});
borrow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (book_in_search.getIn_shelf() > 0&&key==true) {
key=false;
if (student_local.getBookAmount() < 10) {
book_in_search.setIn_shelf(book_in_search.getIn_shelf() - 1);
book_in_search.save();
book_id[student_local.getBookAmount()] = book_in_search.getId();
bookList.add(book_in_search.getName());
Calendar calendar=Calendar.getInstance();
int year=calendar.get(Calendar.YEAR);
int day=calendar.get(Calendar.DAY_OF_YEAR); //获得当前的时间
student_local.setBookList(student_local.getBookAmount(),book_in_search.getId());
student_local.setBookyear(student_local.getBookAmount(),year);
student_local.setBookday(student_local.getBookAmount(),day);
student_local.setBookAmount(student_local.getBookAmount()+1);
student_local.save();
listView.setAdapter(adapter);
Toast.makeText(Student_homepage.this, "借书成功", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(Student_homepage.this, "借书数目已达到上限,请还书后再借", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(Student_homepage.this, "该书已经全部被借出", Toast.LENGTH_SHORT).show();
}
}
});
}
}
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