Android管理系统

移动开发 2023-07-01 14:41:03 阅读次数: 0

Android管理系统

一、项目简介

本项目是连接云数据库MySQL设计的一款职工管理系统，基于java语言。
GitHub项目链接: Android职工档案管理系统

二、登录注册功能

1.登录注册功能MySQL用户信息表

列名 username password
类型 varchar varchar
长度 10 10

2.链接
登录注册功能介绍可以参考我的上一篇博客：链接: Android实现登录注册功能
3.使用介绍
若要正常使用登录注册功能，源码下载后需要修改JDBCUtils.java里的这段代码：

//要连接MySQL数据库的URL    URL_MySQL="jdbc:mysql://外网地址:端口/数据库名称"
    public static final String URL_MySQL="jdbc:mysql://外网地址:端口/数据库名称";
    //要连接MySQL数据库的用户名  NAME_MySQL="MySQL用户名"
    public static final String NAME_MySQL="MySQL用户名";
    //要连接MySQL数据库的密码    PASSWORD_MySQL="MySQL密码"
    public static final String PASSWORD_MySQL="MySQL密码";

“jdbc:mysql://外网地址:端口/数据库名称”，"MySQL用户名"和"MySQL密码"要改成自己的。

三、职工信息管理功能

主页展示：
main.png
通过点击添加，删除，修改，查询Button按钮使用Intent进行页面跳转
主要代码如下：
@RequiresApi(api = Build.VERSION_CODES.N)
@Override
public void onClick(View v)
{
if(v.getId()==R.id.button_add)
{
Intent intent=new Intent(this,AddActivity.class);
startActivity(intent);
}
if(v.getId()==R.id.button_query)
{
Intent intent=new Intent(this,QueryActivity.class);
startActivity(intent);
}
if(v.getId()==R.id.button_delete)
{
Intent intent=new Intent(this,DeleteActivity.class);
startActivity(intent);
}
if(v.getId()==R.id.button_modify)
{
Intent intent=new Intent(this,ModifyActivity.class);
startActivity(intent);
}
}

布局代码如下：
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:background="#ADD8E6"
    tools:context=".MainActivity">
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/img"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:orientation="vertical"
        android:gravity="bottom">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="职工档案管理系统"
                android:textSize="25sp"
                android:textStyle="bold"
                android:background="@drawable/shape_rectangle_textview"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"/>
        </LinearLayout>
        <TextView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1">
        </TextView>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">
            <Button
                android:id="@+id/button_add"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:text="添加"/>
            <Button
                android:id="@+id/button_delete"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:text="删除"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">
            <Button
                android:id="@+id/button_modify"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:text="修改"/>
            <Button
                android:id="@+id/button_query"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:text="查询"/>
        </LinearLayout>
    </LinearLayout>
</RelativeLayout>

1、数据库方面

1.1 MySQL职工信息表

列名 id name sex department position salary phone
类型 varchar varchar varchar varchar varchar varchar varchar
长度 10 10 2 10 10 10 10

1.2 数据库展示（我这里使用的是腾讯云数据库MySQL）
MySQL.png

2、控件方面

1. 控件介绍

简单控件：按钮控件Button，文本内容TextView
中级控件：复选框CheckBox，编辑框EditText，提醒对话框AlertDialog
高级控件：列表视图ListView，基本适配器BaseAdapter

2. 控件调用

1.提醒对话框AlertDialog：提醒对话框可以通过工具类AlertDialogUtils.java调用。

public class AlertDialogUtils {
    
    
    public static void AlertDialog(Context context,String message)
    {
    
    
        //弹出提醒对话框，提醒用户用户名不能为空
        AlertDialog.Builder builder=new AlertDialog.Builder(context);
        builder.setIcon(R.mipmap.ic_launcher);
        builder.setTitle("尊敬的用户");
        builder.setMessage(message);
        builder.setPositiveButton("好的",null);
        AlertDialog alertDialog=builder.create();
        alertDialog.show();
        //设计AlertDialog提醒对话框大小
        WindowManager.LayoutParams layoutParams=alertDialog.getWindow().getAttributes();
        layoutParams.width=700;
        layoutParams.height=565;
        alertDialog.getWindow().setAttributes(layoutParams);//设置AlertDialog的宽高
    }
}

调用AlertDialog时点击“确定”后可在public void onClick(DialogInterface dialog, int which){}内调用功能函数

builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    
    
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {
    
    
                                    }
                                });

2.列表视图ListView和基本适配器BaseAdapter的调用用于显示所有职工的信息，在查询功能，删除功能和修改功能都有用到。

3. 布局方面

使用LinearLayout线性布局和RelativeLayout相对布局

4. 代码方面

要使用职工信息管理功能，那么JDBCUtils2.java，JDBCUtils3.java，JDBCUtils4.java，JDBCUtils5.java的"jdbc:mysql://外网地址:端口/数据库名称"，"MySQL用户名"和"MySQL密码"都要改成自己的。

1. 数据库连接与断开类

1.1 JDBCUtils2.java用于连接MySQL云数据库进行后续职工信息的增删改查

public class JDBCUtils2 {
    
    
    //要连接MySQL数据库的URL    URL_MySQL="jdbc:mysql://外网地址:端口/数据库名称"
    public static final String URL_MySQL="jdbc:mysql://外网地址:端口/数据库名称";
    //要连接MySQL数据库的用户名  NAME_MySQL="MySQL用户名"
    public static final String NAME_MySQL="MySQL用户名";
    //要连接MySQL数据库的密码    PASSWORD_MySQL="MySQL密码"
    public static final String PASSWORD_MySQL="MySQL密码";

    //使用PreparedStatement来执行SQL语句查询
    public static PreparedStatement preparedStatement;
    //使用Resultset接收JDBC查询语句返回的数据集对象
    public static ResultSet resultSet;
    //连接数据库
    public static Connection connection;

    public static void connect2()
    {
    
    
        //开启连接数据库
        Log.d("注意","开启连接数据库中......");
        connection=null;
        try {
    
    
            //加载驱动
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            //获取与数据库的连接
            connection= DriverManager.getConnection(URL_MySQL,NAME_MySQL,PASSWORD_MySQL);
        }catch (Exception e){
    
    
            //对异常情况进行处理
            e.printStackTrace();
        }
    }

    public static void close2()
    {
    
    
        Log.d("注意","正在关闭数据库连接......");
        try{
    
    
            if(resultSet!=null){
    
    
                resultSet.close();//关闭接收
                resultSet=null;
            }
            if(preparedStatement!=null){
    
    
                preparedStatement.close();//关闭sql语句查询
                preparedStatement=null;
            }
            if(connection!=null){
    
    
                connection.close();//关闭数据库连接
                connection=null;
            }
        }catch (Exception e){
    
    
            //对异常情况进行处理
            e.printStackTrace();
        }
    }
}

1.2 JDBCUtils3.java用于连接MySQL云数据库获取职工总人数
功能函数如下：
public static int getWorkerNumber()
{
//要连接MySQL数据库的URL URL_MySQL=“jdbc:mysql://外网地址:端口/数据 库名称”
final String URL_MySQL=“jdbc:mysql://外网地址:端口/数据库名称”;
//要连接MySQL数据库的用户名 NAME_MySQL=“MySQL用户名”
final String NAME_MySQL=“MySQL用户名”;
//要连接MySQL数据库的密码 PASSWORD_MySQL=“MySQL密码”
final String PASSWORD_MySQL=“MySQL密码”;
connection=null;
int count=0;
try{
//加载驱动
Class.forName(“com.mysql.jdbc.Driver”).newInstance();
//获取与数据库的连接
connection= DriverManager.getConnection(URL_MySQL,NAME_MySQL,PASSWORD_MySQL);
String sql=“SELECT COUNT(*) FROM worker”;
statement=connection.createStatement();
resultSet=statement.executeQuery(sql);
while (resultSet.next())
{
count=resultSet.getInt(1);
}
}catch (Exception e){
e.printStackTrace();
}
return count;
}

1.3 JDBCUtils4.java用于连接MySQL云数据库获取职工中男性人数
功能函数如下：
public static int getWorkerMan()
{
//要连接MySQL数据库的URL URL_MySQL=“jdbc:mysql://外网地址:端口/数据库名称”
final String URL_MySQL=“jdbc:mysql://外网地址:端口/数据库名称”;
//要连接MySQL数据库的用户名 NAME_MySQL=“MySQL用户名”
final String NAME_MySQL=“MySQL用户名”;
//要连接MySQL数据库的密码 PASSWORD_MySQL=“MySQL密码”
final String PASSWORD_MySQL=“MySQL密码”;
connection=null;
int count=0;
try{
//加载驱动
Class.forName(“com.mysql.jdbc.Driver”).newInstance();
//获取与数据库的连接
connection= DriverManager.getConnection(URL_MySQL,NAME_MySQL,PASSWORD_MySQL);
String sql=“SELECT COUNT(*) FROM worker WHERE sex = ‘男’”;
statement=connection.createStatement();
resultSet=statement.executeQuery(sql);
while (resultSet.next())
{
count=resultSet.getInt(1);
}
}catch (Exception e){
e.printStackTrace();
}
return count;
}

1.4 JDBCUtils5.java用于连接MySQL云数据库获取职工中女性人数
功能函数如下：
public static int getWorkerWoman()
{
//要连接MySQL数据库的URL URL_MySQL=“jdbc:mysql://外网地址:端口/数据库名称”
final String URL_MySQL=“jdbc:mysql://外网地址:端口/数据库名称”;
//要连接MySQL数据库的用户名 NAME_MySQL=“MySQL用户名”
final String NAME_MySQL=“MySQL用户名”;
//要连接MySQL数据库的密码 PASSWORD_MySQL=“MySQL密码”
final String PASSWORD_MySQL=“MySQL密码”;
connection=null;
int count=0;
try{
//加载驱动
Class.forName(“com.mysql.jdbc.Driver”).newInstance();
//获取与数据库的连接
connection= DriverManager.getConnection(URL_MySQL,NAME_MySQL,PASSWORD_MySQL);
String sql=“SELECT COUNT(*) FROM worker WHERE sex = ‘女’”;
statement=connection.createStatement();
resultSet=statement.executeQuery(sql);
while (resultSet.next())
{
count=resultSet.getInt(1);
}
}catch (Exception e){
e.printStackTrace();
}
return count;
}

2. 职工信息类

Worker.java

public class Worker implements Serializable {
    
    
    private String id;//职工编号
    private String name;//职工姓名
    private String sex;//职工性别
    private String department;//职工所在部门
    private String position;//职工职位
    private String salary;//职工工资
    private String phone;//职工电话

    public Worker(){
    
    }

    public Worker(String id,String name,String sex,String department,String position,String salary,String phone)
    {
    
    
        this.id=id;
        this.name=name;
        this.sex=sex;
        this.department=department;
        this.position=position;
        this.salary=salary;
        this.phone=phone;
    }

    public String getId() {
    
    
        return id;
    }

    public String getName() {
    
    
        return name;
    }

    public String getSex() {
    
    
        return sex;
    }

    public String getDepartment() {
    
    
        return department;
    }

    public String getPosition() {
    
    
        return position;
    }

    public String getSalary() {
    
    
        return salary;
    }

    public String getPhone() {
    
    
        return phone;
    }

    public void setId(String id) {
    
    
        this.id = id;
    }

    public void setName(String name) {
    
    
        this.name = name;
    }

    public void setSex(String sex) {
    
    
        this.sex = sex;
    }

    public void setDepartment(String department) {
    
    
        this.department = department;
    }

    public void setPosition(String position) {
    
    
        this.position = position;
    }

    public void setSalary(String salary) {
    
    
        this.salary = salary;
    }

    public void setPhone(String phone) {
    
    
        this.phone = phone;
    }
}

3. 用户数据操作类

WorkerDao.java

public class WorkerDao extends JDBCUtils2{
    
    
    public Worker findID(String id)
    {
    
    
        connect2();//获得连接
        Worker worker=null;
        try{
    
    
            //处理sql语句。我这里是根据我自己的worker表的id字段来查询记录
            String sql="select * from worker where id=?";
            //获得预处理对象。获取用于向数据库发送sql语句的preparedStatement
            preparedStatement=connection.prepareStatement(sql);
            //设置实际参数。用于根据编号进行查询
            preparedStatement.setString(1,id);
            //执行。执行sql查询语句并返回结果集
            resultSet= preparedStatement.executeQuery();
            //如果当前记录不是结果集中的最后一行，则进入循环体。
            while (resultSet.next())
            {
    
    
                worker=new Worker();
                //获取id列列值
                worker.setId(resultSet.getString("id"));
            }
        }catch (Exception e){
    
    
            //对异常情况进行处理
            e.printStackTrace();
        }finally {
    
    
            close2();
        }return worker;
    }
    public int addWorker(Worker worker)
    {
    
    
        int value=0;
        connect2();
        try {
    
    
            //处理sql语句。我这里是向我自己worker表的id,name,sex,department,position,salary,phone添加数据
            String sql="insert into worker(id,name,sex,department,position,salary,phone) values(?,?,?,?,?,?,?)";
            preparedStatement=connection.prepareStatement(sql);
            //设置实际参数。将数据插入数据库中
            preparedStatement.setString(1, worker.getId());//设置编号
            preparedStatement.setString(2, worker.getName());//设置姓名
            preparedStatement.setString(3, worker.getSex());//设置性别
            preparedStatement.setString(4, worker.getDepartment());//设置部门
            preparedStatement.setString(5, worker.getPosition());//设置职位
            preparedStatement.setString(6, worker.getSalary());//设置工资
            preparedStatement.setString(7, worker.getPhone());//设置电话号码
            value=preparedStatement.executeUpdate();
        }catch (Exception e){
    
    
            e.printStackTrace();
        }finally {
    
    
            close2();
        }return value;
    }
    public List<Worker> findWorkerList()
    {
    
    
        List<Worker> list=new ArrayList<>();
        connect2();
        try{
    
    
            String sql="select * from worker";
            preparedStatement=connection.prepareStatement(sql);
            resultSet=preparedStatement.executeQuery();
            while (resultSet.next())
            {
    
    
                Worker worker=new Worker();
                worker.setId(resultSet.getString("id"));
                worker.setName(resultSet.getString("name"));
                worker.setSex(resultSet.getString("sex"));
                worker.setDepartment(resultSet.getString("department"));
                worker.setPosition(resultSet.getString("position"));
                worker.setSalary(resultSet.getString("salary"));
                worker.setPhone(resultSet.getString("phone"));
                list.add(worker);
            }
        }catch (Exception e){
    
    
            e.printStackTrace();
        }finally {
    
    
            close2();
        }return list;
    }
    public int deleteWorker(String id)
    {
    
    
        int value=0;
        try {
    
    
            connect2();
            String sql="delete from worker where id=?";
            preparedStatement=connection.prepareStatement(sql);
            preparedStatement.setString(1,id);
            value=preparedStatement.executeUpdate();
        }catch (Exception e){
    
    
            e.printStackTrace();
        }finally {
    
    
            close2();
        }return value;
    }
    public int modifyWorker(Worker worker)
    {
    
    
        int value=0;
        connect2();
        try {
    
    
            String sql="update worker set name=?,sex=?,department=?,position=?,salary=?,phone=? where id=?";
            preparedStatement=connection.prepareStatement(sql);
            preparedStatement.setString(1,worker.getName());
            preparedStatement.setString(2,worker.getSex());
            preparedStatement.setString(3,worker.getDepartment());
            preparedStatement.setString(4,worker.getPosition());
            preparedStatement.setString(5,worker.getSalary());
            preparedStatement.setString(6,worker.getPhone());
            preparedStatement.setString(7,worker.getId());
            value=preparedStatement.executeUpdate();
        }catch (Exception e){
    
    
            e.printStackTrace();
        }finally {
    
    
            close2();
        }return value;
    }
    public Worker findID2(String id)
    {
    
    
        connect2();//获得连接
        Worker worker=null;
        try{
    
    
            //处理sql语句。我这里是根据我自己的worker表的id字段来查询记录
            String sql="select * from worker where id=?";
            //获得预处理对象。获取用于向数据库发送sql语句的preparedStatement
            preparedStatement=connection.prepareStatement(sql);
            //设置实际参数。用于根据编号进行查询
            preparedStatement.setString(1,id);
            //执行。执行sql查询语句并返回结果集
            resultSet= preparedStatement.executeQuery();
            //如果当前记录不是结果集中的最后一行，则进入循环体。
            while (resultSet.next())
            {
    
    
                String name=resultSet.getString("name");
                String sex=resultSet.getString("sex");
                String department=resultSet.getString("department");
                String position=resultSet.getString("position");
                String salary=resultSet.getString("salary");
                String phone=resultSet.getString("phone");
                worker=new Worker(id,name,sex,department,position,salary,phone);
            }
        }catch (Exception e){
    
    
            //对异常情况进行处理
            e.printStackTrace();
        }finally {
    
    
            close2();
        }return worker;
    }
}

4. 添加功能

add.png
AddActivity.java

public void add()
    {
    
    
        final String id=editText_worker_id.getText().toString().trim();
        final String name=editText_worker_name.getText().toString().trim();
        final String sex=editText_worker_sex.getText().toString().trim();
        final String department=editText_worker_department.getText().toString().trim();
        final String position=editText_worker_position.getText().toString().trim();
        final String salary=editText_worker_salary.getText().toString().trim();
        final String phone=editText_worker_phone.getText().toString().trim();
        if(TextUtils.isEmpty(id))
        {
    
    
            AlertDialogUtils.AlertDialog(AddActivity.this,"请输入编号！");
            editText_worker_id.requestFocus();
            return;
        }else if (TextUtils.isEmpty(name))
        {
    
    
            AlertDialogUtils.AlertDialog(AddActivity.this,"请输入姓名！");
            editText_worker_name.requestFocus();
            return;
        }else if (TextUtils.isEmpty(sex))
        {
    
    
            AlertDialogUtils.AlertDialog(AddActivity.this,"请输入性别！");
            editText_worker_sex.requestFocus();
            return;
        }else if (TextUtils.isEmpty(department))
        {
    
    
            AlertDialogUtils.AlertDialog(AddActivity.this,"请输入部门！");
            editText_worker_department.requestFocus();
            return;
        }else if (TextUtils.isEmpty(position))
        {
    
    
            AlertDialogUtils.AlertDialog(AddActivity.this,"请输入职位！");
            editText_worker_position.requestFocus();
            return;
        }else if (TextUtils.isEmpty(salary))
        {
    
    
            AlertDialogUtils.AlertDialog(AddActivity.this,"请输入工资！");
            editText_worker_salary.requestFocus();
            return;
        }else if (TextUtils.isEmpty(phone))
        {
    
    
            AlertDialogUtils.AlertDialog(AddActivity.this,"请输入电话号码！");
            editText_worker_phone.requestFocus();
            return;
        }else
        {
    
    
            final Worker worker=new Worker();
            worker.setId(id);
            worker.setName(name);
            worker.setSex(sex);
            worker.setDepartment(department);
            worker.setPosition(position);
            worker.setSalary(salary);
            worker.setPhone(phone);
            new Thread(new Runnable() {
    
    
                @Override
                public void run() {
    
    
                    final int value=workerDao.addWorker(worker);
                    if(value>0)
                    {
    
    
                        handler.post(new Runnable() {
    
    
                            @Override
                            public void run() {
    
    
                                //创建提醒对话框的建造器
                                AlertDialog.Builder builder=new AlertDialog.Builder(AddActivity.this);
                                //设计对话框标题图标
                                builder.setIcon(R.mipmap.ic_launcher);
                                //设置对话框标题文本
                                builder.setTitle("尊敬的用户");
                                //设置对话框内容文本
                                builder.setMessage("添加成功！");
                                //设置对话框的肯定按钮文本及其点击监听器
                                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    
    
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {
    
    
                                        Intent intent=new Intent(AddActivity.this,MainActivity.class);
                                        startActivity(intent);
                                    }
                                });
                                AlertDialog alertDialog=builder.create();//根据建造器构建提醒对话框对象
                                alertDialog.show();//显示提醒对话框
                                //设计AlertDialog提醒对话框大小
                                WindowManager.LayoutParams layoutParams=alertDialog.getWindow().getAttributes();
                                layoutParams.width=700;
                                layoutParams.height=565;
                                alertDialog.getWindow().setAttributes(layoutParams);//设置AlertDialog的宽高
                                return;
                            }
                        });
                    }else
                    {
    
    
                        Looper.prepare();
                        AlertDialogUtils.AlertDialog(AddActivity.this,"添加失败！");
                        Looper.loop();
                    }
                }
            }).start();
        }
    }

    @RequiresApi(api = Build.VERSION_CODES.N)
    @Override
    public void onClick(View v)
    {
    
    
        if(v.getId()==R.id.button_add_return)
        {
    
    
            Intent intent=new Intent(this,MainActivity.class);
            startActivity(intent);
        }
        if(v.getId()==R.id.button_add_right)
        {
    
    
            final String id=editText_worker_id.getText().toString().trim();
            new Thread(new Runnable() {
    
    
                @Override
                public void run() {
    
    
                    final Worker worker_id=workerDao.findID(id);
                    handler.post(new Runnable() {
    
    
                        @Override
                        public void run() {
    
    
                            if (worker_id!=null)
                            {
    
    
                                //创建提醒对话框的建造器
                                AlertDialog.Builder builder=new AlertDialog.Builder(AddActivity.this);
                                //设计对话框标题图标
                                builder.setIcon(R.mipmap.ic_launcher);
                                //设置对话框标题文本
                                builder.setTitle("尊敬的用户");
                                //设置对话框内容文本
                                builder.setMessage("您所输入的职工编号已存在，请重新输入！");
                                //设置对话框的肯定按钮文本及其点击监听器
                                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    
    
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {
    
    
                                        editText_worker_id.setText("");//清空编号编辑框内容
                                        editText_worker_name.setText("");//清空姓名编辑框内容
                                        editText_worker_sex.setText("");//清空性别编辑框内容
                                        editText_worker_department.setText("");//清空部门编辑框内容
                                        editText_worker_position.setText("");//清空职位编辑框内容
                                        editText_worker_salary.setText("");//清空工资编辑框内容
                                        editText_worker_phone.setText("");//清空电话编辑框内容
                                    }
                                });
                                AlertDialog alertDialog=builder.create();//根据建造器构建提醒对话框对象
                                alertDialog.show();//显示提醒对话框
                                //设计AlertDialog提醒对话框大小
                                WindowManager.LayoutParams layoutParams=alertDialog.getWindow().getAttributes();
                                layoutParams.width=700;
                                layoutParams.height=565;
                                alertDialog.getWindow().setAttributes(layoutParams);//设置AlertDialog的宽高
                                return;
                            }else
                            {
    
    
                                add();
                            }
                        }
                    });
                }
            }).start();
        }
    }

activity_add.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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"
    android:background="#ADD8E6"
    android:orientation="vertical"
    tools:context=".AddActivity">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="添加职工档案信息"
        android:gravity="center"
        android:textSize="25sp"
        android:textStyle="bold"
        android:background="@drawable/shape_rectangle_textview">
    </TextView>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="30dp"
        android:layout_marginTop="70dp"
        android:layout_marginBottom="10dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:textColor="#000000"
            android:textStyle="bold"
            android:textSize="20sp"
            android:text="编号："
            android:gravity="center|bottom"/>
        <EditText
            android:id="@+id/editText_worker_id"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:maxLength="9"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="30dp"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:textColor="#000000"
            android:textStyle="bold"
            android:textSize="20sp"
            android:text="姓名："
            android:gravity="center|bottom"/>
        <EditText
            android:id="@+id/editText_worker_name"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:maxLength="9"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="30dp"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:textColor="#000000"
            android:textStyle="bold"
            android:textSize="20sp"
            android:text="性别："
            android:gravity="center|bottom"/>
        <EditText
            android:id="@+id/editText_worker_sex"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:maxLength="1"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="30dp"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:textColor="#000000"
            android:textStyle="bold"
            android:textSize="20sp"
            android:text="部门："
            android:gravity="center|bottom"/>
        <EditText
            android:id="@+id/editText_worker_department"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:maxLength="9"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="30dp"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:textColor="#000000"
            android:textStyle="bold"
            android:textSize="20sp"
            android:text="职位："
            android:gravity="center|bottom"/>
        <EditText
            android:id="@+id/editText_worker_position"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:maxLength="9"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="30dp"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:textColor="#000000"
            android:textStyle="bold"
            android:textSize="20sp"
            android:text="工资："
            android:gravity="center|bottom"/>
        <EditText
            android:id="@+id/editText_worker_salary"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:maxLength="9"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="30dp"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:textColor="#000000"
            android:textStyle="bold"
            android:textSize="20sp"
            android:text="电话："
            android:gravity="center|bottom"/>
        <EditText
            android:id="@+id/editText_worker_phone"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:maxLength="9"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal">
        <Button
            android:id="@+id/button_add_return"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#000000"
            android:textStyle="bold"
            android:textSize="20sp"
            android:layout_margin="20dp"
            android:text="返回"/>
        <Button
            android:id="@+id/button_add_right"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textColor="#000000"
            android:textStyle="bold"
            android:textSize="20sp"
            android:layout_margin="20dp"
            android:text="确认添加"/>
    </LinearLayout>
</LinearLayout>

5. 删除功能

delete.png
WorkerBaseAdapter2

public class WorkerBaseAdapter2 extends BaseAdapter {
    
    
    private Context context;//声明一个上下文对象
    private List<Worker> workerList;//声明一个职工信息列表
    private buttonListDeleteOnClickListener buttonListDeleteOnClickListener;
    private Button button_list_delete;
    public WorkerBaseAdapter2(){
    
    }
    //职工适配器的构造方法，传入上下文与职工列表
    public WorkerBaseAdapter2(Context context,List<Worker> workerList)
    {
    
    
        this.context=context;
        this.workerList=workerList;
    }

    public void setWorkerList(List<Worker> workerList) {
    
    
        this.workerList = workerList;
    }

    public void setButtonListDeleteOnClickListener(buttonListDeleteOnClickListener buttonListDeleteOnClickListener) {
    
    
        this.buttonListDeleteOnClickListener = buttonListDeleteOnClickListener;
    }

    //获取列表项的个数
    @Override
    public int getCount() {
    
    
        return workerList.size();
    }

    //获取列表项的数据
    @Override
    public Object getItem(int position) {
    
    
        return workerList.get(position);
    }

    //获取列表项的编号
    @Override
    public long getItemId(int position) {
    
    
        return position;
    }

    //获取指定位置的列表视图
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
    
    
        WorkerBaseAdapter2.ViewHolder viewHolder;
        //如果转换视图为空
        if(convertView==null)
        {
    
    
            viewHolder=new WorkerBaseAdapter2.ViewHolder();//创建一个新的视图持有者
            //根据布局文件worker_listview_delete.xml生成转换视图对象
            convertView= LayoutInflater.from(context).inflate(R.layout.worker_listview_delete,null);
            viewHolder.textView_query_id2=convertView.findViewById(R.id.textview_query_id2);
            viewHolder.textView_query_name2=convertView.findViewById(R.id.textview_query_name2);
            viewHolder.textView_query_sex2=convertView.findViewById(R.id.textview_query_sex2);
            viewHolder.textView_query_department2=convertView.findViewById(R.id.textview_query_department2);
            viewHolder.textView_query_position2=convertView.findViewById(R.id.textview_query_position2);
            viewHolder.textView_query_salary2=convertView.findViewById(R.id.textview_query_salary2);
            viewHolder.textView_query_phone2=convertView.findViewById(R.id.textview_query_phone2);
            viewHolder.button_list_delete=convertView.findViewById(R.id.button_list_delete);
            convertView.setTag(viewHolder);//将视图持有者保存到转换视图当中
        }else
        {
    
    
            //如果转换视图非空，则从转换视图中获取之前保存的视图持有者
            viewHolder=(WorkerBaseAdapter2.ViewHolder) convertView.getTag();
        }
        Worker worker=workerList.get(position);
        viewHolder.textView_query_id2.setText(worker.getId());//显示职工编号
        viewHolder.textView_query_name2.setText(worker.getName());//显示职工姓名
        viewHolder.textView_query_sex2.setText(worker.getSex());//显示职工性别
        viewHolder.textView_query_department2.setText(worker.getDepartment());//显示职工部门
        viewHolder.textView_query_position2.setText(worker.getPosition());//显示职工职位
        viewHolder.textView_query_salary2.setText(worker.getSalary());//显示职工工资
        viewHolder.textView_query_phone2.setText(worker.getPhone());//显示职工电话
        viewHolder.button_list_delete.setOnClickListener(new View.OnClickListener() {
    
    
            @Override
            public void onClick(View v) {
    
    
                buttonListDeleteOnClickListener.buttonListDeleteOnClickListener(v,position);
            }
        });
        return convertView;
    }
    //定义一个视图持有者，以便重用列表项的视图资源
    public final class ViewHolder
    {
    
    
        public TextView textView_query_id2;//声明职工编号的文本视图对象
        public TextView textView_query_name2;//声明职工姓名的文本视图对象
        public TextView textView_query_sex2;//声明职工性别的文本视图对象
        public TextView textView_query_department2;//声明职工部门的文本视图对象
        public TextView textView_query_position2;//声明职工职位的文本视图对象
        public TextView textView_query_salary2;//声明职工工资的文本视图对象
        public TextView textView_query_phone2;//声明职工电话的文本视图对象
        private Button button_list_delete;//声明删除职工按钮
    }
}

DeleteActivity.java

public void delete()
    {
    
    
        final String id=editText_delete_by_id.getText().toString().trim();
        if(TextUtils.isEmpty(id))
        {
    
    
            AlertDialogUtils.AlertDialog(DeleteActivity.this,"请输入编号！");
            editText_delete_by_id.requestFocus();
            return;
        }else
        {
    
    
            new Thread(new Runnable() {
    
    
                @Override
                public void run() {
    
    
                    final int value=workerDao.deleteWorker(id);
                    if(value>0)
                    {
    
    
                        handler.post(new Runnable() {
    
    
                            @Override
                            public void run() {
    
    
                                //创建提醒对话框的建造器
                                AlertDialog.Builder builder=new AlertDialog.Builder(DeleteActivity.this);
                                //设计对话框标题图标
                                builder.setIcon(R.mipmap.ic_launcher);
                                //设置对话框标题文本
                                builder.setTitle("尊敬的用户");
                                //设置对话框内容文本
                                builder.setMessage("删除成功！");
                                //设置对话框的肯定按钮文本及其点击监听器
                                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    
    
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {
    
    
                                        new Thread(new Runnable() {
    
    
                                            @Override
                                            public void run() {
    
    
                                                workerList=workerDao.findWorkerList();
                                                handler.post(new Runnable() {
    
    
                                                    @Override
                                                    public void run() {
    
    
                                                        if(workerBaseAdapter2==null)
                                                        {
    
    
                                                            workerBaseAdapter2=new WorkerBaseAdapter2(DeleteActivity.this,workerList);
                                                            listView_all_worker2.setAdapter(workerBaseAdapter2);
                                                        }else
                                                        {
    
    
                                                            workerBaseAdapter2.setWorkerList(workerList);
                                                            workerBaseAdapter2.notifyDataSetChanged();
                                                        }
                                                    }
                                                });
                                            }
                                        }).start();
                                    }
                                });
                                AlertDialog alertDialog=builder.create();//根据建造器构建提醒对话框对象
                                alertDialog.show();//显示提醒对话框
                                //设计AlertDialog提醒对话框大小
                                WindowManager.LayoutParams layoutParams=alertDialog.getWindow().getAttributes();
                                layoutParams.width=700;
                                layoutParams.height=565;
                                alertDialog.getWindow().setAttributes(layoutParams);//设置AlertDialog的宽高
                                return;
                            }
                        });
                    }else
                    {
    
    
                        Looper.prepare();
                        AlertDialogUtils.AlertDialog(DeleteActivity.this,"删除失败！该职工编号不存在！请重新输入");
                        Looper.loop();
                    }
                }
            }).start();
        }
    }
    @RequiresApi(api = Build.VERSION_CODES.N)
    @Override
    public void onClick(View v)
    {
    
    
        if(v.getId()==R.id.button_delete_return)
        {
    
    
            Intent intent=new Intent(this,MainActivity.class);
            startActivity(intent);
        }
        if(v.getId()==R.id.button_delete_by_id)
        {
    
    
            delete();
            editText_delete_by_id.setText("");
        }
    }

new Thread(new Runnable() {
@Override
public void run() {
workerList=workerDao.findWorkerList();
handler.post(new Runnable() {
@Override
public void run() {
if(workerBaseAdapter2null)
{
workerBaseAdapter2=new WorkerBaseAdapter2(DeleteActivity.this,workerList);
listView_all_worker2.setAdapter(workerBaseAdapter2);
}else
{
workerBaseAdapter2.setWorkerList(workerList);
workerBaseAdapter2.notifyDataSetChanged();
}
workerBaseAdapter2.setButtonListDeleteOnClickListener(new buttonListDeleteOnClickListener() {
@Override
public void buttonListDeleteOnClickListener(View view, int position) {
final Worker worker=workerList.get(position);
//创建提醒对话框的建造器
AlertDialog.Builder builder=new AlertDialog.Builder(DeleteActivity.this);
//设计对话框标题图标
builder.setIcon(R.mipmap.ic_launcher);
//设置对话框标题文本
builder.setTitle(“尊敬的用户”);
//设置对话框内容文本
builder.setMessage(“您确定要删除职工编号为”+worker.getId()+“的职工吗？”);
//设置对话框的肯定按钮文本及其点击监听器
builder.setPositiveButton(“确定”, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
new Thread(new Runnable() {
@Override
public void run() {
final int value=workerDao.deleteWorker(worker.getId());
handler.post(new Runnable() {
@Override
public void run() {
new Thread(new Runnable() {
@Override
public void run() {
workerList=workerDao.findWorkerList();
handler.post(new Runnable() {
@Override
public void run() {
if(workerBaseAdapter2null)
{
workerBaseAdapter2=new WorkerBaseAdapter2(DeleteActivity.this,workerList);
listView_all_worker2.setAdapter(workerBaseAdapter2);
}else
{
workerBaseAdapter2.setWorkerList(workerList);
workerBaseAdapter2.notifyDataSetChanged();
}
}
});
}
}).start();
}
});
}
}).start();
}
});
builder.setNegativeButton(“取消”,null);
AlertDialog alertDialog=builder.create();//根据建造器构建提醒对话框对象
alertDialog.show();//显示提醒对话框
//设计AlertDialog提醒对话框大小
WindowManager.LayoutParams layoutParams=alertDialog.getWindow().getAttributes();
layoutParams.width=700;
layoutParams.height=565;
alertDialog.getWindow().setAttributes(layoutParams);//设置AlertDialog的宽高
}
});
}
});
}
}).start();

worker_listview_delete.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:textColor="#000000"
                android:textStyle="bold"
                android:text="编号："/>
            <TextView
                android:id="@+id/textview_query_id2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:textColor="#000000"
                android:textStyle="bold"
                android:gravity="left"/>
        </LinearLayout>
        <Button
            android:id="@+id/button_list_delete"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:text="删除"
            android:backgroundTint="#FF0000">
        </Button>
    </RelativeLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:text="姓名："/>
        <TextView
            android:id="@+id/textview_query_name2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:layout_weight="1"
            android:gravity="left"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:text="性别："/>
        <TextView
            android:id="@+id/textview_query_sex2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:layout_weight="1"
            android:gravity="left"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:text="部门："/>
        <TextView
            android:id="@+id/textview_query_department2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:layout_weight="1"
            android:gravity="left"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:text="职位："/>
        <TextView
            android:id="@+id/textview_query_position2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:layout_weight="1"
            android:gravity="left"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:text="工资："/>
        <TextView
            android:id="@+id/textview_query_salary2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:layout_weight="1"
            android:gravity="left"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:text="电话："/>
        <TextView
            android:id="@+id/textview_query_phone2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:textColor="#000000"
            android:textStyle="bold"
            android:layout_weight="1"
            android:gravity="left"/>
    </LinearLayout>
</LinearLayout>

activivty_delete.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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"
    android:orientation="vertical"
    tools:context=".DeleteActivity">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:background="#66BB">
        <Button
            android:id="@+id/button_delete_return"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="返回"/>
        <EditText
            android:id="@+id/editText_delete_by_id"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:maxLength="9"
            android:hint="请输入要删除职工的编号"
            android:textColorHint="#999999"
            android:background="@drawable/shape_round_rectangle"/>
        <Button
            android:id="@+id/button_delete_by_id"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="删除"/>
    </LinearLayout>
    <ListView
        android:id="@+id/listView_all_worker2"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </ListView>
</LinearLayout>

6. 修改功能

modify.png

7. 查询功能

query.png
由于篇幅原因就不多做展示了

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