周一同学Zelina⛱️ 序言
前段时间期末周，这学期有一门课叫移动应用开发，这门课的期末作业是用 Android 写一个个人记账管理系统。 Android 的前台是用 xml 实现，后台是用 java 实现。于是，对这两门语言不太熟悉的周一，开始了漫漫长路的摸索之旅。
接下来就来讲解，如何从 0 到 1 实现一个简易的个人记账系统。
一起来学习 ⑧~🙃
温馨小提示： 第二部分的编码阶段代码较多，可直接滑到第三部分看运行效果，并到第四部分克隆 github 仓库代码，阅读体验更加~
📋 一、系统结构设计 Design
1. 需求分析
首先我们先来看下老师的需求 👇
设计和实现一个类似个人财务管理的 Android APP ，数据库采用 SQLite （也可以直接访问 Web 端 MySQL 数据库、或提供 Web 接口访问 MySQL 数据库）。
APP 应具备以下功能：
- 用户注册和登录（这类
APP一般面对个人，用户不需要分类别）； - 收入和支出管理（单条收支记录的添加、删除和修改，收入和支出每一条记录至少包括日期、类型、金额和说明。）
- 收入和支出查询（根据时间段、类别等进行查询）
- 收入和支出统计（例如某个月、某个星期或指定时间段的总收支）
- 其他要求：界面设计应尽量美观，可以添加一些图片或背景。
基于以上需求，周一对所要实现的功能进行了整理。请看下方思维导图：
2. 数据库设计
分析完成之后，接下来开始设计数据库。详情见下方思维导图：
因为功能较为简单，所以数据库只设计了两张表。
3. 界面设计
设计完数据库之后，开始楷模润色该 APP 的界面。基于本次课题需求，周一设计了 5 个界面。接下来先来看 App 的具体界面设计：
看完五个界面所需要的内容之后，接下来，我们来对它进行原型绘制。请看下图：
现在，原型图设计完毕。我们接着设计高保真 App 界面。请看下图：
4. 过程设计
好了，看完原型图之后，我们是不是该来想想页面与页面之间，是怎么进行交互的呢？
因此，现在我们来对整个过程进行设计。详情见下方思维导图：
📘 二、编码阶段 Coding
1. 项目结构 🗂️
（1）文件目录
先来看项目的文件目录，详情看下图👇
（2）AndroidManifest.xml
接下来附上 AndroidManifest.xml 的代码，具体代码如下：
xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.financial.management">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="个人财务管理App"
android:roundIcon="@mipmap/ic_launcher"
android:supportsRtl="true"
android:theme="@style/Theme.Final">
<activity android:name="com.financial.management.ManageActivity"></activity>
<activity android:name="com.financial.management.SearchRecordActivity" />
<activity android:name="com.financial.management.RegisterActivity"/>
<activity android:name="com.financial.management.UserCenterActivity" />
<activity android:name="com.financial.management.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest><?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.financial.management">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="个人财务管理App"
android:roundIcon="@mipmap/ic_launcher"
android:supportsRtl="true"
android:theme="@style/Theme.Final">
<activity android:name="com.financial.management.ManageActivity"></activity>
<activity android:name="com.financial.management.SearchRecordActivity" />
<activity android:name="com.financial.management.RegisterActivity"/>
<activity android:name="com.financial.management.UserCenterActivity" />
<activity android:name="com.financial.management.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>（3）Activity 类解读
看完上面两个内容之后，接下来是 Activity 类的解读时间。详情见下表 👇
| 文件名 | 作用 |
|---|---|
| MainActivity | 用户登录页面 Activity，用户可以进行登录。 |
| RegisterActivity | 用户注册页面 Activity，用户可以进行注册。 |
| UserCenterActivity | 个人中心 Activity，对应用户个人中心的 4 个按钮进行功能编写，实现用户收支管理、查看收支、收支统计、退出登录四大功能。 |
| ManageActivity | 收支管理 Activity，对用户的收入和支出进行管理。 |
| SearchRecordActivity | 查询收支 Activity，通过条件对数据库中的数据进行查询，得出用户想要查询的收支结果。 |
| DBHelper | 创建数据库表和数据库数据，同时实现与数据库操作相关的登录和注册方法。 |
| User | 用户类 Activity，用于获取用户 ID 以及密码。 |
（4）XML 解读
解读完 Activity 类之后，现在来对 XML 的各个文件进行介绍。详情见下表 👇
| 文件名 | 作用 |
|---|---|
| activity_main.xml | 用户登录页面，用户通过输入账号和密码，进行登录操作。 |
| activity_register.xml | 用户注册页面，用户通过输入账号和密码，进行注册操作。 |
| activity_user_center.xml | 个人中心页面，当用户登录成功以后，进行个人中心页面。个人中心实现收支管理、查看收支、收支统计、退出登录四大功能。 |
| activity_search_record.xml | 通过选择年份月份来进行查询该年该月份的各个收入支出详情，并且计算总金额以及根据类别来计算该类别的总金额。 |
| activity_manage.xml | 用户对自己的日常开销进行收支管理，可以进行添加、删除和修改等操作。 |
| record_item_layout.xml | 用来存储列表的传输数据 |
到这里，大家先对待会要编写的 Activity 类和 XML 文件所要展示的功能先进行一番了解。
2. 静态页面 ⌛
现在，我们到了真正的编码阶段啦！如果是按照我的编码习惯的话，我一般会先把静态页面进行构建，并把一些需要预留的 id 等等信息给先处理好，方便后面写业务逻辑时可以直接进行绑定。
针对以上 6 个静态页面，下面将进行代码编写。
（1）用户登录页面 activity_main.xml
activity_main.xml 是用户登录页面，当用户通过输入账号和密码时，可以进行登录操作。具体代码如下：
xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center_horizontal"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/textView1"
android:layout_width="360dp"
android:layout_height="360dp"
android:gravity="center"
android:background="@drawable/login_logo"
android:textColor="#fff"
android:textSize="24dp"
android:layout_marginTop="-30dp"
android:layout_marginHorizontal="45dp"/>
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="60dp"
android:gravity="center|center_horizontal"
android:text="用户登录"
android:textColor="#5768C5"
android:textSize="20dp"
android:layout_marginTop="-60dp"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingHorizontal="20dp"
android:paddingVertical="10dp">
<ImageView
android:id="@+id/imageView3"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_weight="0"
app:srcCompat="@drawable/account" />
<EditText
android:id="@+id/edt_uid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2"
android:ems="10"
android:hint="请输入您的用户名"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:orientation="horizontal"
android:paddingHorizontal="20dp"
android:paddingVertical="10dp">
<ImageView
android:id="@+id/imageView4"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_weight="0"
app:srcCompat="@drawable/password" />
<EditText
android:id="@+id/edt_upwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="请输入您的密码"
android:inputType="textPassword" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="80dp"
android:gravity="center"
android:orientation="horizontal"
android:paddingHorizontal="60dp">
<Button
android:id="@+id/btn_login"
android:layout_width="100dp"
android:layout_height="60dp"
android:layout_weight="1"
android:text="登录"
android:textSize="18dp"
app:backgroundTint="#4757AE"
app:cornerRadius="50dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<Button
android:id="@+id/btn_register"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center"
android:text="还没有账号？现在注册"
android:textColor="#888282"
android:textColorHint="#FFFFFFFF"
android:backgroundTint="#FFFFFFFF"
android:color="#FFFFFF"
/>
</LinearLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="20dp"
android:background="#FFFFFF"
android:layout_marginTop="-10dp"/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout><?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center_horizontal"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/textView1"
android:layout_width="360dp"
android:layout_height="360dp"
android:gravity="center"
android:background="@drawable/login_logo"
android:textColor="#fff"
android:textSize="24dp"
android:layout_marginTop="-30dp"
android:layout_marginHorizontal="45dp"/>
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="60dp"
android:gravity="center|center_horizontal"
android:text="用户登录"
android:textColor="#5768C5"
android:textSize="20dp"
android:layout_marginTop="-60dp"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingHorizontal="20dp"
android:paddingVertical="10dp">
<ImageView
android:id="@+id/imageView3"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_weight="0"
app:srcCompat="@drawable/account" />
<EditText
android:id="@+id/edt_uid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2"
android:ems="10"
android:hint="请输入您的用户名"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:orientation="horizontal"
android:paddingHorizontal="20dp"
android:paddingVertical="10dp">
<ImageView
android:id="@+id/imageView4"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_weight="0"
app:srcCompat="@drawable/password" />
<EditText
android:id="@+id/edt_upwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="请输入您的密码"
android:inputType="textPassword" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="80dp"
android:gravity="center"
android:orientation="horizontal"
android:paddingHorizontal="60dp">
<Button
android:id="@+id/btn_login"
android:layout_width="100dp"
android:layout_height="60dp"
android:layout_weight="1"
android:text="登录"
android:textSize="18dp"
app:backgroundTint="#4757AE"
app:cornerRadius="50dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<Button
android:id="@+id/btn_register"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center"
android:text="还没有账号？现在注册"
android:textColor="#888282"
android:textColorHint="#FFFFFFFF"
android:backgroundTint="#FFFFFFFF"
android:color="#FFFFFF"
/>
</LinearLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="20dp"
android:background="#FFFFFF"
android:layout_marginTop="-10dp"/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>（2）用户注册页面 activity_register.xml
activity_register.xml 是用户注册页面，用户通过输入账号和密码，可以进行注册操作。具体代码如下：
xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".RegisterActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/textView10"
android:layout_width="220dp"
android:layout_height="220dp"
android:background="@drawable/register_logo"
android:gravity="center"
android:textColor="#FFEB3B"
android:layout_marginBottom="20dp"/>
<TextView
android:id="@+id/textView5"
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center"
android:text="用户注册"
android:textColor="#0C6BC2"
android:textSize="22sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingHorizontal="20dp"
android:layout_marginTop="10dp">
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="45dp"
android:layout_weight="0"
android:text="账 号: "
android:textColor="#0C6BC2"
android:textSize="22sp" />
<EditText
android:id="@+id/edt_rid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="请输入需要注册的账号"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingHorizontal="20dp"
android:layout_marginVertical="15dp">
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0"
android:text="密 码: "
android:textColor="#0C6BC2"
android:textSize="22sp" />
<EditText
android:id="@+id/edt_rpwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="请输入密码"
android:inputType="textPassword" />
</LinearLayout>
<Button
android:id="@+id/btn_registeruser"
android:layout_width="260dp"
android:layout_height="60dp"
android:layout_gravity="center"
android:layout_marginVertical="20dp"
android:background="#2D6C2F"
android:gravity="center"
android:text="注册"
android:textSize="22sp"
app:backgroundTint="#1C8DE6" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout><?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".RegisterActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/textView10"
android:layout_width="220dp"
android:layout_height="220dp"
android:background="@drawable/register_logo"
android:gravity="center"
android:textColor="#FFEB3B"
android:layout_marginBottom="20dp"/>
<TextView
android:id="@+id/textView5"
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center"
android:text="用户注册"
android:textColor="#0C6BC2"
android:textSize="22sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingHorizontal="20dp"
android:layout_marginTop="10dp">
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="45dp"
android:layout_weight="0"
android:text="账 号: "
android:textColor="#0C6BC2"
android:textSize="22sp" />
<EditText
android:id="@+id/edt_rid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="请输入需要注册的账号"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingHorizontal="20dp"
android:layout_marginVertical="15dp">
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0"
android:text="密 码: "
android:textColor="#0C6BC2"
android:textSize="22sp" />
<EditText
android:id="@+id/edt_rpwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="请输入密码"
android:inputType="textPassword" />
</LinearLayout>
<Button
android:id="@+id/btn_registeruser"
android:layout_width="260dp"
android:layout_height="60dp"
android:layout_gravity="center"
android:layout_marginVertical="20dp"
android:background="#2D6C2F"
android:gravity="center"
android:text="注册"
android:textSize="22sp"
app:backgroundTint="#1C8DE6" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>（3）用户个人中心页面 activity_user_center.xml
现在，来到了个人中心页面。在个人中心页面当中，将会显示具体的用户名。同时， 有四个按钮入口，分别是：收支管理，查看收支，退出登录和收支统计。来看下具体代码实现：
xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".UserCenterActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="120dp"
android:orientation="horizontal"
android:gravity="center">
<ImageView
android:id="@+id/imageView"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/girl"
android:layout_marginHorizontal="30dp"/>
<TextView
android:id="@+id/tv_welcome"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center|left"
android:textColor="#4F92CF"
android:textSize="24sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal"
android:layout_marginTop="40dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="20dp"
android:background="#FFFFFF"
android:gravity="center_horizontal"
android:orientation="vertical"
android:padding="24dp"
android:elevation="10dp"
app:cornerRadius="30dp">
<ImageView
android:id="@+id/btn_recordmanage"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/revenue" />
<TextView
android:id="@+id/textView17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="收支管理"
android:textColor="#252020"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center_horizontal"
android:layout_marginHorizontal="20dp"
android:background="#FFFFFF"
android:padding="24dp"
android:elevation="10dp"
app:cornerRadius="30dp">
<ImageView
android:id="@+id/btn_searchrecord"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/look" />
<TextView
android:id="@+id/textView22"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="查看收支"
android:textColor="#FF252020"
android:textSize="18sp"
android:layout_marginTop="20dp"/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal"
android:layout_marginVertical="30dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center_horizontal"
android:layout_marginHorizontal="20dp"
android:background="#FFFFFF"
android:padding="24dp"
android:elevation="10dp"
app:cornerRadius="30dp">
<ImageView
android:id="@+id/btn_exit"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/exit" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="退出登录"
android:textColor="#FF252020"
android:textSize="18sp"
android:layout_marginTop="20dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center_horizontal"
android:layout_marginHorizontal="20dp"
android:background="#FFFFFF"
android:padding="24dp"
android:elevation="10dp"
app:cornerRadius="30dp">
<ImageView
android:id="@+id/btn_calcmoney"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/statics" />
<TextView
android:id="@+id/textView23"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="收支统计"
android:textColor="#FF252020"
android:textSize="18sp"
android:layout_marginTop="20dp"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout><?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".UserCenterActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="120dp"
android:orientation="horizontal"
android:gravity="center">
<ImageView
android:id="@+id/imageView"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/girl"
android:layout_marginHorizontal="30dp"/>
<TextView
android:id="@+id/tv_welcome"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center|left"
android:textColor="#4F92CF"
android:textSize="24sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal"
android:layout_marginTop="40dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="20dp"
android:background="#FFFFFF"
android:gravity="center_horizontal"
android:orientation="vertical"
android:padding="24dp"
android:elevation="10dp"
app:cornerRadius="30dp">
<ImageView
android:id="@+id/btn_recordmanage"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/revenue" />
<TextView
android:id="@+id/textView17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="收支管理"
android:textColor="#252020"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center_horizontal"
android:layout_marginHorizontal="20dp"
android:background="#FFFFFF"
android:padding="24dp"
android:elevation="10dp"
app:cornerRadius="30dp">
<ImageView
android:id="@+id/btn_searchrecord"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/look" />
<TextView
android:id="@+id/textView22"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="查看收支"
android:textColor="#FF252020"
android:textSize="18sp"
android:layout_marginTop="20dp"/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal"
android:layout_marginVertical="30dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center_horizontal"
android:layout_marginHorizontal="20dp"
android:background="#FFFFFF"
android:padding="24dp"
android:elevation="10dp"
app:cornerRadius="30dp">
<ImageView
android:id="@+id/btn_exit"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/exit" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="退出登录"
android:textColor="#FF252020"
android:textSize="18sp"
android:layout_marginTop="20dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center_horizontal"
android:layout_marginHorizontal="20dp"
android:background="#FFFFFF"
android:padding="24dp"
android:elevation="10dp"
app:cornerRadius="30dp">
<ImageView
android:id="@+id/btn_calcmoney"
android:layout_width="60dp"
android:layout_height="60dp"
app:srcCompat="@drawable/statics" />
<TextView
android:id="@+id/textView23"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="收支统计"
android:textColor="#FF252020"
android:textSize="18sp"
android:layout_marginTop="20dp"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>（4）用户搜索记录页面 activity_search_record.xml
用户可以通过选择年份月份和筛选类型，点击搜索，来查询该年该月份的各个收入和支出的详情，同时在该时间点和该筛选类型下，点击计算可以对总金额进行计算。下面附上具体代码实现：
xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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="wrap_content"
tools:context=".SearchRecordActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:layout_marginTop="50dp"
android:layout_marginBottom="10dp">
<ImageView
android:id="@+id/imageView2"
android:layout_width="120dp"
android:layout_height="120dp"
app:srcCompat="@drawable/income_2" />
<TextView
android:id="@+id/textView20"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="我的收支"
android:textColor="#3F51B5"
android:textSize="20sp"
android:layout_marginTop="10dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="horizontal"
android:gravity="center_vertical"
android:layout_marginHorizontal="24dp"
android:layout_marginTop="30dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="100dp"
android:orientation="vertical">
<TextView
android:id="@+id/textView33"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:text="日期 "
android:gravity="center_vertical"
android:textColor="#111113"
android:textSize="18sp" />
<TextView
android:id="@+id/textView34"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:text="类型 "
android:gravity="center_vertical"
android:textColor="#FF111113"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_weight="1"
android:orientation="vertical">
<Spinner
android:id="@+id/spin_date"
android:layout_width="match_parent"
android:layout_height="50dp" />
<Spinner
android:id="@+id/spin_type"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="100dp"
android:orientation="vertical"
android:gravity="center_vertical">
<Button
android:id="@+id/btn_search"
android:layout_width="60dp"
android:layout_height="40dp"
android:background="#39DC54"
android:text="搜索"
android:textColor="#FAF9F9"
android:textSize="12sp"
app:backgroundTint="#5E97DA" />
</LinearLayout>
</LinearLayout>
<ImageView
android:layout_width="360dp"
android:layout_height="0.5dp"
android:background="#D1CDCD"
android:layout_gravity="center"
android:paddingHorizontal="24dp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center_vertical"
android:orientation="horizontal"
android:layout_marginHorizontal="24dp">
<TextView
android:id="@+id/textView32"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:text="总金额 "
android:gravity="center_vertical"
android:textColor="#FF111113"
android:textSize="18sp" />
<TextView
android:id="@+id/tv_show"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_weight="1"
android:textColor="#4CAF65"
android:textSize="24sp"
android:gravity="center_vertical"/>
<Button
android:id="@+id/btn_calc"
android:layout_width="60dp"
android:layout_height="40dp"
android:gravity="center_vertical"
android:text="计算"
android:textColor="#FAF9F9"
android:textSize="12sp"
app:backgroundTint="#5E97DA" />
</LinearLayout>
<ImageView
android:layout_width="360dp"
android:layout_height="0.5dp"
android:background="#D1CDCD"
android:layout_gravity="center"
android:paddingHorizontal="20dp"/>
<TextView
android:id="@+id/textView31"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center_vertical"
android:text="查询结果 "
android:layout_marginTop="20dp"
android:textColor="#111113"
android:layout_marginHorizontal="24dp"
android:textSize="18sp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginVertical="20dp"
android:layout_marginHorizontal="20dp">
<TextView
android:id="@+id/textView29"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="序号"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
<TextView
android:id="@+id/textView26"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="日期"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
<TextView
android:id="@+id/textView25"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="类型"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
<TextView
android:id="@+id/textView27"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="金额"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
<TextView
android:id="@+id/textView28"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="说明"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
</LinearLayout>
<ListView
android:id="@+id/searchlistview"
android:layout_width="match_parent"
android:layout_height="500dp"
android:layout_weight="0"
android:layout_marginHorizontal="20dp"/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout><?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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="wrap_content"
tools:context=".SearchRecordActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:layout_marginTop="50dp"
android:layout_marginBottom="10dp">
<ImageView
android:id="@+id/imageView2"
android:layout_width="120dp"
android:layout_height="120dp"
app:srcCompat="@drawable/income_2" />
<TextView
android:id="@+id/textView20"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="我的收支"
android:textColor="#3F51B5"
android:textSize="20sp"
android:layout_marginTop="10dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="horizontal"
android:gravity="center_vertical"
android:layout_marginHorizontal="24dp"
android:layout_marginTop="30dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="100dp"
android:orientation="vertical">
<TextView
android:id="@+id/textView33"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:text="日期 "
android:gravity="center_vertical"
android:textColor="#111113"
android:textSize="18sp" />
<TextView
android:id="@+id/textView34"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:text="类型 "
android:gravity="center_vertical"
android:textColor="#FF111113"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_weight="1"
android:orientation="vertical">
<Spinner
android:id="@+id/spin_date"
android:layout_width="match_parent"
android:layout_height="50dp" />
<Spinner
android:id="@+id/spin_type"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="100dp"
android:orientation="vertical"
android:gravity="center_vertical">
<Button
android:id="@+id/btn_search"
android:layout_width="60dp"
android:layout_height="40dp"
android:background="#39DC54"
android:text="搜索"
android:textColor="#FAF9F9"
android:textSize="12sp"
app:backgroundTint="#5E97DA" />
</LinearLayout>
</LinearLayout>
<ImageView
android:layout_width="360dp"
android:layout_height="0.5dp"
android:background="#D1CDCD"
android:layout_gravity="center"
android:paddingHorizontal="24dp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center_vertical"
android:orientation="horizontal"
android:layout_marginHorizontal="24dp">
<TextView
android:id="@+id/textView32"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:text="总金额 "
android:gravity="center_vertical"
android:textColor="#FF111113"
android:textSize="18sp" />
<TextView
android:id="@+id/tv_show"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_weight="1"
android:textColor="#4CAF65"
android:textSize="24sp"
android:gravity="center_vertical"/>
<Button
android:id="@+id/btn_calc"
android:layout_width="60dp"
android:layout_height="40dp"
android:gravity="center_vertical"
android:text="计算"
android:textColor="#FAF9F9"
android:textSize="12sp"
app:backgroundTint="#5E97DA" />
</LinearLayout>
<ImageView
android:layout_width="360dp"
android:layout_height="0.5dp"
android:background="#D1CDCD"
android:layout_gravity="center"
android:paddingHorizontal="20dp"/>
<TextView
android:id="@+id/textView31"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center_vertical"
android:text="查询结果 "
android:layout_marginTop="20dp"
android:textColor="#111113"
android:layout_marginHorizontal="24dp"
android:textSize="18sp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginVertical="20dp"
android:layout_marginHorizontal="20dp">
<TextView
android:id="@+id/textView29"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="序号"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
<TextView
android:id="@+id/textView26"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="日期"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
<TextView
android:id="@+id/textView25"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="类型"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
<TextView
android:id="@+id/textView27"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="金额"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
<TextView
android:id="@+id/textView28"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="说明"
android:textColor="#6290c8"
android:textStyle="bold"
android:textSize="18sp"
android:gravity="center_horizontal"/>
</LinearLayout>
<ListView
android:id="@+id/searchlistview"
android:layout_width="match_parent"
android:layout_height="500dp"
android:layout_weight="0"
android:layout_marginHorizontal="20dp"/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>（5）收支管理页面 activity_manage.xml
对于收支管理页面来说，用户可以对自己的日常开销进行收支管理，同时也可以进行添加、删除和修改等操作。具体代码如下：
xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".ManageActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dp"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/imageView2"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_marginTop="20dp"
app:srcCompat="@drawable/income_1" />
<TextView
android:id="@+id/textView20"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:text="收支管理"
android:textColor="#3F51B5"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center_vertical"
android:orientation="horizontal">
<TextView
android:id="@+id/textView36"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="20dp"
android:text="您选择的序号是："
android:textColor="#152029"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv_test"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="暂未选择"
android:textColor="#4CAF50"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="20dp"
android:layout_marginVertical="10dp"
android:gravity="center"
android:orientation="horizontal">
<TextView
android:id="@+id/textView29"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:text="序号"
android:textColor="#111819"
android:textSize="18sp" />
<TextView
android:id="@+id/textView26"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="日期"
android:textColor="#111819"
android:textSize="18sp" />
<TextView
android:id="@+id/textView25"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="类型"
android:textColor="#111819"
android:textSize="18sp" />
<TextView
android:id="@+id/textView27"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="金额"
android:textColor="#111819"
android:textSize="18sp" />
<TextView
android:id="@+id/textView28"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="说明"
android:textColor="#111819"
android:textSize="18sp" />
</LinearLayout>
<ImageView
android:layout_width="380dp"
android:layout_height="0.5dp"
android:background="#D8D3D3"
android:paddingHorizontal="20dp" />
<ListView
android:id="@+id/recordlistview"
android:layout_width="wrap_content"
android:layout_height="120dp"
android:layout_weight="1"></ListView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="14dp"
android:orientation="horizontal">
<TextView
android:id="@+id/textView18"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="日期: "
android:textColor="#101112"
android:textSize="18sp" />
<EditText
android:id="@+id/edt_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="填写日期，如：202107表示2021年7月"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="14dp"
android:orientation="horizontal">
<TextView
android:id="@+id/textView21"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="类型: "
android:textColor="#101112"
android:textSize="18sp" />
<EditText
android:id="@+id/edt_type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="类型为收入或支出"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="14dp"
android:orientation="horizontal">
<TextView
android:id="@+id/textView30"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="金额: "
android:textColor="#101112"
android:textSize="18sp" />
<EditText
android:id="@+id/edt_money"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="请输入金额"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="14dp"
android:orientation="horizontal">
<TextView
android:id="@+id/tv_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="说明: "
android:textColor="#101112"
android:textSize="18sp" />
<EditText
android:id="@+id/edt_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="阐述说明"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginVertical="30dp">
<Button
android:id="@+id/btn_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="10dp"
android:layout_weight="1"
android:text="添加"
app:backgroundTint="#78C6A3" />
<Button
android:id="@+id/btn_update"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="10dp"
android:layout_weight="1"
android:text="修改"
app:backgroundTint="#56AB91" />
<Button
android:id="@+id/btn_delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="10dp"
android:layout_weight="1"
android:text="删除"
app:backgroundTint="#358F80" />
</LinearLayout>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout><?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".ManageActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dp"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/imageView2"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_marginTop="20dp"
app:srcCompat="@drawable/income_1" />
<TextView
android:id="@+id/textView20"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:text="收支管理"
android:textColor="#3F51B5"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center_vertical"
android:orientation="horizontal">
<TextView
android:id="@+id/textView36"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="20dp"
android:text="您选择的序号是："
android:textColor="#152029"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv_test"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="暂未选择"
android:textColor="#4CAF50"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="20dp"
android:layout_marginVertical="10dp"
android:gravity="center"
android:orientation="horizontal">
<TextView
android:id="@+id/textView29"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:text="序号"
android:textColor="#111819"
android:textSize="18sp" />
<TextView
android:id="@+id/textView26"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="日期"
android:textColor="#111819"
android:textSize="18sp" />
<TextView
android:id="@+id/textView25"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="类型"
android:textColor="#111819"
android:textSize="18sp" />
<TextView
android:id="@+id/textView27"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="金额"
android:textColor="#111819"
android:textSize="18sp" />
<TextView
android:id="@+id/textView28"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="说明"
android:textColor="#111819"
android:textSize="18sp" />
</LinearLayout>
<ImageView
android:layout_width="380dp"
android:layout_height="0.5dp"
android:background="#D8D3D3"
android:paddingHorizontal="20dp" />
<ListView
android:id="@+id/recordlistview"
android:layout_width="wrap_content"
android:layout_height="120dp"
android:layout_weight="1"></ListView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="14dp"
android:orientation="horizontal">
<TextView
android:id="@+id/textView18"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="日期: "
android:textColor="#101112"
android:textSize="18sp" />
<EditText
android:id="@+id/edt_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="填写日期，如：202107表示2021年7月"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="14dp"
android:orientation="horizontal">
<TextView
android:id="@+id/textView21"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="类型: "
android:textColor="#101112"
android:textSize="18sp" />
<EditText
android:id="@+id/edt_type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="类型为收入或支出"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="14dp"
android:orientation="horizontal">
<TextView
android:id="@+id/textView30"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="金额: "
android:textColor="#101112"
android:textSize="18sp" />
<EditText
android:id="@+id/edt_money"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="请输入金额"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="14dp"
android:orientation="horizontal">
<TextView
android:id="@+id/tv_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="说明: "
android:textColor="#101112"
android:textSize="18sp" />
<EditText
android:id="@+id/edt_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:hint="阐述说明"
android:inputType="textPersonName" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginVertical="30dp">
<Button
android:id="@+id/btn_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="10dp"
android:layout_weight="1"
android:text="添加"
app:backgroundTint="#78C6A3" />
<Button
android:id="@+id/btn_update"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="10dp"
android:layout_weight="1"
android:text="修改"
app:backgroundTint="#56AB91" />
<Button
android:id="@+id/btn_delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginHorizontal="10dp"
android:layout_weight="1"
android:text="删除"
app:backgroundTint="#358F80" />
</LinearLayout>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>（6）列表数据记录 record_item_layout.xml
record_item_layout.xml 主要用途是存储列表的传输数据。具体代码如下：
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="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_marginHorizontal="20dp"
android:gravity="center_horizontal"
android:paddingVertical="2dp">
<TextView
android:id="@+id/list_id"
android:layout_width="40dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
<TextView
android:id="@+id/list_date"
android:layout_width="90dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
<TextView
android:id="@+id/list_type"
android:layout_width="70dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
<TextView
android:id="@+id/list_money"
android:layout_width="70dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
<TextView
android:id="@+id/list_state"
android:layout_width="90dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
</LinearLayout>
</LinearLayout><?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="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_marginHorizontal="20dp"
android:gravity="center_horizontal"
android:paddingVertical="2dp">
<TextView
android:id="@+id/list_id"
android:layout_width="40dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
<TextView
android:id="@+id/list_date"
android:layout_width="90dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
<TextView
android:id="@+id/list_type"
android:layout_width="70dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
<TextView
android:id="@+id/list_money"
android:layout_width="70dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
<TextView
android:id="@+id/list_state"
android:layout_width="90dp"
android:layout_height="24dp"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_horizontal" />
</LinearLayout>
</LinearLayout>3. 逻辑结构 💡
写完静态页面之后，接下来我们要对每个页面的逻辑进行编写。现在我们来看一下各个 Activity 类所实现的内容都有些什么呢？
（1）DBHelper 类
DBHelper 类用于创建数据库表和数据库数据，同时实现与数据库操作相关的登录和注册方法。具体代码实现如下：
java
package com.financial.management;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DBHelper extends SQLiteOpenHelper {
public static final String DB_NAME = "Test.db";
public static final String TABLE_NAME = "userinfo";
public static final String COLUMN_USERID = "uid";
public static final String COLUMN_USERPWD = "upwd";
//创建数据库语句
private static final String CREATE_TABLE = "create table if not exists "
+ TABLE_NAME + "(" + COLUMN_USERID + " text not null primary key,"
+ COLUMN_USERPWD + " text not null)";
public DBHelper(Context context) {
super(context, DB_NAME, null, 1);
}
//创建数据库方法
@Override
public void onCreate(SQLiteDatabase db) {
try {
db.execSQL(CREATE_TABLE);
db.execSQL("insert into " + TABLE_NAME + " values('11','11')");
} catch (SQLException e) {
e.printStackTrace();
}
}
//重置数据库方法(先删表，再建表)
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("drop table if exists " + TABLE_NAME);
db.execSQL(CREATE_TABLE);
}
//登录方法
public User userlogin(String userId, String userPwd) {
User user = null;
SQLiteDatabase db = getReadableDatabase();
Cursor cursor = db.query(TABLE_NAME,
new String[]{COLUMN_USERID, COLUMN_USERPWD},
COLUMN_USERID + "=? and " + COLUMN_USERPWD + "=?",
new String[]{userId, userPwd},
null,
null,
null);
if (cursor.getCount() > 0) {
cursor.moveToFirst();
user = new User();
user.setUserId(cursor.getString(cursor.getColumnIndex(COLUMN_USERID)));
user.setUserPwd(cursor.getString(cursor.getColumnIndex(COLUMN_USERPWD)));
}
return user;
}
//注册方法
public long registerUser(User user) {
SQLiteDatabase db = getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(COLUMN_USERID, user.getUserId());
contentValues.put(COLUMN_USERPWD, user.getUserPwd());
return db.insert(TABLE_NAME, null, contentValues);
}
}package com.financial.management;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DBHelper extends SQLiteOpenHelper {
public static final String DB_NAME = "Test.db";
public static final String TABLE_NAME = "userinfo";
public static final String COLUMN_USERID = "uid";
public static final String COLUMN_USERPWD = "upwd";
//创建数据库语句
private static final String CREATE_TABLE = "create table if not exists "
+ TABLE_NAME + "(" + COLUMN_USERID + " text not null primary key,"
+ COLUMN_USERPWD + " text not null)";
public DBHelper(Context context) {
super(context, DB_NAME, null, 1);
}
//创建数据库方法
@Override
public void onCreate(SQLiteDatabase db) {
try {
db.execSQL(CREATE_TABLE);
db.execSQL("insert into " + TABLE_NAME + " values('11','11')");
} catch (SQLException e) {
e.printStackTrace();
}
}
//重置数据库方法(先删表，再建表)
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("drop table if exists " + TABLE_NAME);
db.execSQL(CREATE_TABLE);
}
//登录方法
public User userlogin(String userId, String userPwd) {
User user = null;
SQLiteDatabase db = getReadableDatabase();
Cursor cursor = db.query(TABLE_NAME,
new String[]{COLUMN_USERID, COLUMN_USERPWD},
COLUMN_USERID + "=? and " + COLUMN_USERPWD + "=?",
new String[]{userId, userPwd},
null,
null,
null);
if (cursor.getCount() > 0) {
cursor.moveToFirst();
user = new User();
user.setUserId(cursor.getString(cursor.getColumnIndex(COLUMN_USERID)));
user.setUserPwd(cursor.getString(cursor.getColumnIndex(COLUMN_USERPWD)));
}
return user;
}
//注册方法
public long registerUser(User user) {
SQLiteDatabase db = getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(COLUMN_USERID, user.getUserId());
contentValues.put(COLUMN_USERPWD, user.getUserPwd());
return db.insert(TABLE_NAME, null, contentValues);
}
}（2）MainActivity 类
MainActivity 类是用户登录页面的 Activity，主要编写用户登录页面的代码逻辑。具体代码实现如下：
java
package com.financial.management;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import java.util.ArrayList;
//登录页面逻辑
public class MainActivity extends AppCompatActivity {
EditText edt_id,edt_pwd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edt_id = findViewById(R.id.edt_uid);
edt_pwd =findViewById(R.id.edt_upwd);
Button btn_login = findViewById(R.id.btn_login);
//登录按键
btn_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
String userId=edt_id.getText().toString();
String userPwd=edt_pwd.getText().toString();
DBHelper dbuserHelper=new DBHelper(getApplicationContext());
User user = dbuserHelper.userlogin(userId,userPwd);
//登录成功跳转对应类型界面
if(user!=null) {
Toast.makeText(getApplicationContext(), user.getUserId() + "登录成功", Toast.LENGTH_SHORT).show();
Intent intent;
ArrayList<User> list = new ArrayList<>();
list.add(user);
intent = new Intent(getApplicationContext(), UserCenterActivity.class);
intent.putParcelableArrayListExtra("LoginUser", list);
startActivity(intent);
}else{
Toast.makeText(getApplicationContext(),"登录失败，密码错误或账号不存在！",Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),"数据库异常",Toast.LENGTH_SHORT).show();
}
}
});
//注册按键
Button btn_register=findViewById(R.id.btn_register);
btn_register.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(getApplicationContext(),RegisterActivity.class);
startActivity(intent);
}
});
}
}package com.financial.management;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import java.util.ArrayList;
//登录页面逻辑
public class MainActivity extends AppCompatActivity {
EditText edt_id,edt_pwd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edt_id = findViewById(R.id.edt_uid);
edt_pwd =findViewById(R.id.edt_upwd);
Button btn_login = findViewById(R.id.btn_login);
//登录按键
btn_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
String userId=edt_id.getText().toString();
String userPwd=edt_pwd.getText().toString();
DBHelper dbuserHelper=new DBHelper(getApplicationContext());
User user = dbuserHelper.userlogin(userId,userPwd);
//登录成功跳转对应类型界面
if(user!=null) {
Toast.makeText(getApplicationContext(), user.getUserId() + "登录成功", Toast.LENGTH_SHORT).show();
Intent intent;
ArrayList<User> list = new ArrayList<>();
list.add(user);
intent = new Intent(getApplicationContext(), UserCenterActivity.class);
intent.putParcelableArrayListExtra("LoginUser", list);
startActivity(intent);
}else{
Toast.makeText(getApplicationContext(),"登录失败，密码错误或账号不存在！",Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),"数据库异常",Toast.LENGTH_SHORT).show();
}
}
});
//注册按键
Button btn_register=findViewById(R.id.btn_register);
btn_register.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(getApplicationContext(),RegisterActivity.class);
startActivity(intent);
}
});
}
}（3）RegisterActivity 类
RegisterActivity 类是用户注册页面的 Activity，主要编写用户注册页面的业务逻辑。具体代码实现如下：
java
package com.financial.management;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import java.util.ArrayList;
//注册页面逻辑
public class RegisterActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
final EditText edt_rid =findViewById(R.id.edt_rid);
final EditText edt_rpwd =findViewById(R.id.edt_rpwd);
//注册按键
Button btn_registerf=findViewById(R.id.btn_registeruser);
btn_registerf.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
User user = new User();
user.setUserId(edt_rid.getText().toString());
user.setUserPwd(edt_rpwd.getText().toString());
DBHelper dbUserHelper = new DBHelper(getApplicationContext());
if (dbUserHelper.registerUser(user) > 0) {
Toast.makeText(getApplicationContext(), "注册成功", Toast.LENGTH_SHORT).show();
Intent intent;
ArrayList<User> list = new ArrayList<>();
list.add(user);
intent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(intent);
}else{
Toast.makeText(getApplicationContext(), "您已经注册过此账户，请返回登录", Toast.LENGTH_SHORT).show();
}
}
});
}
}package com.financial.management;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import java.util.ArrayList;
//注册页面逻辑
public class RegisterActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
final EditText edt_rid =findViewById(R.id.edt_rid);
final EditText edt_rpwd =findViewById(R.id.edt_rpwd);
//注册按键
Button btn_registerf=findViewById(R.id.btn_registeruser);
btn_registerf.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
User user = new User();
user.setUserId(edt_rid.getText().toString());
user.setUserPwd(edt_rpwd.getText().toString());
DBHelper dbUserHelper = new DBHelper(getApplicationContext());
if (dbUserHelper.registerUser(user) > 0) {
Toast.makeText(getApplicationContext(), "注册成功", Toast.LENGTH_SHORT).show();
Intent intent;
ArrayList<User> list = new ArrayList<>();
list.add(user);
intent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(intent);
}else{
Toast.makeText(getApplicationContext(), "您已经注册过此账户，请返回登录", Toast.LENGTH_SHORT).show();
}
}
});
}
}（4）UserCenterActivity 类
UserCenterActivity 类是个人中心页面的 Activity，主要编写个人中心各种按钮跳转的业务逻辑。具体代码实现如下：
java
package com.financial.management;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;
//用户个人中心页面逻辑
public class UserCenterActivity extends AppCompatActivity {
ArrayList<User> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_center);
Intent intent=getIntent();
list =intent.getParcelableArrayListExtra("LoginUser");
User user=list.get(0);
final String username=user.getUserId();
TextView tv_welcome=findViewById(R.id.tv_welcome);
tv_welcome.setText("欢迎您 ,用户"+username);
//收支管理
ImageView btn_recordmanage =findViewById(R.id.btn_recordmanage);
btn_recordmanage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent1=new Intent(getApplicationContext(), ManageActivity.class);
startActivity(intent1);
}
});
//收支查询
ImageView btn_searchrecord=findViewById(R.id.btn_searchrecord);
btn_searchrecord.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent2=new Intent(getApplicationContext(),SearchRecordActivity.class);
startActivity(intent2);
}
});
//收支统计
ImageView btn_calcmoney=findViewById(R.id.btn_calcmoney);
btn_calcmoney.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent3=new Intent(getApplicationContext(),SearchRecordActivity.class);
startActivity(intent3);
}
});
//退出按键
ImageView btn_exit=findViewById(R.id.btn_exit);
btn_exit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AlertDialog dialog = new AlertDialog.Builder(UserCenterActivity.this).setTitle("退出操作")
.setMessage("确定退出，不继续玩玩？")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent=new Intent(getApplicationContext(), MainActivity.class);
startActivity(intent);
}
}).setNegativeButton("继续留下！", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).create();
dialog.show();
}
});
}
}package com.financial.management;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;
//用户个人中心页面逻辑
public class UserCenterActivity extends AppCompatActivity {
ArrayList<User> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_center);
Intent intent=getIntent();
list =intent.getParcelableArrayListExtra("LoginUser");
User user=list.get(0);
final String username=user.getUserId();
TextView tv_welcome=findViewById(R.id.tv_welcome);
tv_welcome.setText("欢迎您 ,用户"+username);
//收支管理
ImageView btn_recordmanage =findViewById(R.id.btn_recordmanage);
btn_recordmanage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent1=new Intent(getApplicationContext(), ManageActivity.class);
startActivity(intent1);
}
});
//收支查询
ImageView btn_searchrecord=findViewById(R.id.btn_searchrecord);
btn_searchrecord.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent2=new Intent(getApplicationContext(),SearchRecordActivity.class);
startActivity(intent2);
}
});
//收支统计
ImageView btn_calcmoney=findViewById(R.id.btn_calcmoney);
btn_calcmoney.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent3=new Intent(getApplicationContext(),SearchRecordActivity.class);
startActivity(intent3);
}
});
//退出按键
ImageView btn_exit=findViewById(R.id.btn_exit);
btn_exit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AlertDialog dialog = new AlertDialog.Builder(UserCenterActivity.this).setTitle("退出操作")
.setMessage("确定退出，不继续玩玩？")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent=new Intent(getApplicationContext(), MainActivity.class);
startActivity(intent);
}
}).setNegativeButton("继续留下！", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).create();
dialog.show();
}
});
}
}（5）SearchRecordActivity 类
SearchRecordActivity 类是搜索记录页面的 Activity，主要编写我的收支页面的业务逻辑。具体代码实现如下：
java
package com.financial.management;
import androidx.appcompat.app.AppCompatActivity;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
//收支记录页面业务逻辑
public class SearchRecordActivity extends AppCompatActivity {
//定义spinner中的数据
private String[] date_data= {"", "202101", "202102", "202103", "202104", "202105","202106","202107","202108","202109","202110","202111","202112"};
private String[] type_data = {"", "收入", "支出"};
Spinner spin_date, spin_type;
ListView listView;
TextView tv_show;
float sum=0;
//数据库
private String selectDate, selectType;
private static final String DATABASE_NAME = "Test.db";
private static final String TABLE_NAME = "record";
private static final String COLUMN_ID = "id";
private static final String COLUMN_DATE = "date";
private static final String COLUMN_TYPE = "type";
private static final String COLUMN_MONEY = "money";
private static final String COLUMN_STATE = "state";
private SQLiteDatabase sqLiteDatabase = null;
private void selectSumMoney() {
//自定义查询的sql语句
String sql;
//如果查询时间和查询类型都为空，则查询整个表
if (TextUtils.isEmpty(selectDate) && TextUtils.isEmpty(selectType)) {
sql = "select * from " + TABLE_NAME;
//如果有查询时间，没有查询类型，查询指定内容
} else if (!TextUtils.isEmpty(selectDate) && TextUtils.isEmpty(selectType)) {
sql = "select * from " + TABLE_NAME + " where date='" + selectDate + "'";
//如果没有查询时间，有查询类型，查询指定内容
} else if (TextUtils.isEmpty(selectDate) && !TextUtils.isEmpty(selectType)) {//如果没有查询时间，有查询类型
sql = "select * from " + TABLE_NAME + " where type='" + selectType+"'";
} else {//否则，查询条件都不为空，查询指定内容
sql ="select * from " + TABLE_NAME + " where date='" + selectDate + "' and type='" + selectType+"'";
}
Cursor cursor = sqLiteDatabase.rawQuery(sql, null);
while (cursor.moveToNext()) {
float money = cursor.getFloat(cursor.getColumnIndex(COLUMN_MONEY));
sum=sum+money;
//list.add(map);
}
String money2=String.valueOf(sum);
tv_show.setText(money2);
sum=0;
}
//选择数据
private void selectData() {
//自定义查询的sql语句
String sql;
//如果查询时间和查询类型都为空，则查询整个表
if (TextUtils.isEmpty(selectDate) && TextUtils.isEmpty(selectType)) {
sql = "select * from " + TABLE_NAME;
//如果有查询时间，没有查询类型，查询指定内容
} else if (!TextUtils.isEmpty(selectDate) && TextUtils.isEmpty(selectType)) {
sql = "select * from " + TABLE_NAME + " where date='" + selectDate + "'";
//如果没有查询时间，有查询类型，查询指定内容
} else if (TextUtils.isEmpty(selectDate) && !TextUtils.isEmpty(selectType)) {//如果没有查询时间，有查询类型
sql = "select * from " + TABLE_NAME + " where type='" + selectType+"'";
} else {//否则，查询条件都不为空，查询指定内容
sql = "select * from " + TABLE_NAME + " where date='" + selectDate + "' and type='" + selectType+"'";
}
//将查询到的数据封装到Cursor
Cursor cursor = sqLiteDatabase.rawQuery(sql, null);
ArrayList<Map<String, String>> list = new ArrayList<Map<String, String>>();
if (cursor.getCount() == 0) {
//查无数据则怒不显示列表
// listView.setVisibility(View.GONE);
Toast.makeText(getApplicationContext(), "无数据", Toast.LENGTH_SHORT).show();
} else {
//查有数据则显示列表
listView.setVisibility(View.VISIBLE);
while (cursor.moveToNext()) {
int id = cursor.getInt(cursor.getColumnIndex(COLUMN_ID));
String date = cursor.getString(cursor.getColumnIndex(COLUMN_DATE));
String type = cursor.getString(cursor.getColumnIndex(COLUMN_TYPE));
float money = cursor.getFloat(cursor.getColumnIndex(COLUMN_MONEY));
String state = cursor.getString(cursor.getColumnIndex(COLUMN_STATE));
Map<String, String> map = new HashMap<String, String>();
map.put("id", String.valueOf(id));
map.put("date", date);
map.put("type", type);
map.put("money", String.valueOf(money));
map.put("state", state);
list.add(map);
}
//创建SimpleAdapter
SimpleAdapter simpleAdapter = new SimpleAdapter(getApplicationContext(),
list,
R.layout.record_item_layout,
new String[]{"id", "date", "type", "money", "state"},
new int[]{R.id.list_id, R.id.list_date, R.id.list_type, R.id.list_money, R.id.list_state});
listView.setAdapter(simpleAdapter);
}
}
//时间和类别spinner点击事件
private void initClick() {
//时间事件
spin_date.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
selectDate = date_data[position];
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
//类别事件
spin_type.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
selectType = type_data[position];
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
findViewById(R.id.btn_search).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
selectData();
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search_record);
tv_show=findViewById(R.id.tv_show);
try {
//打开数据库，如果是第一次会创建该数据库，模式为MODE_PRIVATE
sqLiteDatabase = openOrCreateDatabase(DATABASE_NAME, MODE_PRIVATE, null);
//执行创建表的sql语句，虽然每次都调用，但只有首次才创建表
//执行查询
listView = findViewById(R.id.searchlistview);//绑定列表
selectData();
} catch (SQLException e) {
Toast.makeText(this, "数据库异常!", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
ArrayAdapter<String> adapter = new
ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, date_data);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin_date = findViewById(R.id.spin_date);
spin_date.setAdapter(adapter);
ArrayAdapter<String> adapter1 = new
ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, type_data);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin_type = findViewById(R.id.spin_type);
spin_type.setAdapter(adapter1);
initClick();
Button btn_calc=findViewById(R.id.btn_calc);
btn_calc.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
selectSumMoney();
}
});
}
}package com.financial.management;
import androidx.appcompat.app.AppCompatActivity;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
//收支记录页面业务逻辑
public class SearchRecordActivity extends AppCompatActivity {
//定义spinner中的数据
private String[] date_data= {"", "202101", "202102", "202103", "202104", "202105","202106","202107","202108","202109","202110","202111","202112"};
private String[] type_data = {"", "收入", "支出"};
Spinner spin_date, spin_type;
ListView listView;
TextView tv_show;
float sum=0;
//数据库
private String selectDate, selectType;
private static final String DATABASE_NAME = "Test.db";
private static final String TABLE_NAME = "record";
private static final String COLUMN_ID = "id";
private static final String COLUMN_DATE = "date";
private static final String COLUMN_TYPE = "type";
private static final String COLUMN_MONEY = "money";
private static final String COLUMN_STATE = "state";
private SQLiteDatabase sqLiteDatabase = null;
private void selectSumMoney() {
//自定义查询的sql语句
String sql;
//如果查询时间和查询类型都为空，则查询整个表
if (TextUtils.isEmpty(selectDate) && TextUtils.isEmpty(selectType)) {
sql = "select * from " + TABLE_NAME;
//如果有查询时间，没有查询类型，查询指定内容
} else if (!TextUtils.isEmpty(selectDate) && TextUtils.isEmpty(selectType)) {
sql = "select * from " + TABLE_NAME + " where date='" + selectDate + "'";
//如果没有查询时间，有查询类型，查询指定内容
} else if (TextUtils.isEmpty(selectDate) && !TextUtils.isEmpty(selectType)) {//如果没有查询时间，有查询类型
sql = "select * from " + TABLE_NAME + " where type='" + selectType+"'";
} else {//否则，查询条件都不为空，查询指定内容
sql ="select * from " + TABLE_NAME + " where date='" + selectDate + "' and type='" + selectType+"'";
}
Cursor cursor = sqLiteDatabase.rawQuery(sql, null);
while (cursor.moveToNext()) {
float money = cursor.getFloat(cursor.getColumnIndex(COLUMN_MONEY));
sum=sum+money;
//list.add(map);
}
String money2=String.valueOf(sum);
tv_show.setText(money2);
sum=0;
}
//选择数据
private void selectData() {
//自定义查询的sql语句
String sql;
//如果查询时间和查询类型都为空，则查询整个表
if (TextUtils.isEmpty(selectDate) && TextUtils.isEmpty(selectType)) {
sql = "select * from " + TABLE_NAME;
//如果有查询时间，没有查询类型，查询指定内容
} else if (!TextUtils.isEmpty(selectDate) && TextUtils.isEmpty(selectType)) {
sql = "select * from " + TABLE_NAME + " where date='" + selectDate + "'";
//如果没有查询时间，有查询类型，查询指定内容
} else if (TextUtils.isEmpty(selectDate) && !TextUtils.isEmpty(selectType)) {//如果没有查询时间，有查询类型
sql = "select * from " + TABLE_NAME + " where type='" + selectType+"'";
} else {//否则，查询条件都不为空，查询指定内容
sql = "select * from " + TABLE_NAME + " where date='" + selectDate + "' and type='" + selectType+"'";
}
//将查询到的数据封装到Cursor
Cursor cursor = sqLiteDatabase.rawQuery(sql, null);
ArrayList<Map<String, String>> list = new ArrayList<Map<String, String>>();
if (cursor.getCount() == 0) {
//查无数据则怒不显示列表
// listView.setVisibility(View.GONE);
Toast.makeText(getApplicationContext(), "无数据", Toast.LENGTH_SHORT).show();
} else {
//查有数据则显示列表
listView.setVisibility(View.VISIBLE);
while (cursor.moveToNext()) {
int id = cursor.getInt(cursor.getColumnIndex(COLUMN_ID));
String date = cursor.getString(cursor.getColumnIndex(COLUMN_DATE));
String type = cursor.getString(cursor.getColumnIndex(COLUMN_TYPE));
float money = cursor.getFloat(cursor.getColumnIndex(COLUMN_MONEY));
String state = cursor.getString(cursor.getColumnIndex(COLUMN_STATE));
Map<String, String> map = new HashMap<String, String>();
map.put("id", String.valueOf(id));
map.put("date", date);
map.put("type", type);
map.put("money", String.valueOf(money));
map.put("state", state);
list.add(map);
}
//创建SimpleAdapter
SimpleAdapter simpleAdapter = new SimpleAdapter(getApplicationContext(),
list,
R.layout.record_item_layout,
new String[]{"id", "date", "type", "money", "state"},
new int[]{R.id.list_id, R.id.list_date, R.id.list_type, R.id.list_money, R.id.list_state});
listView.setAdapter(simpleAdapter);
}
}
//时间和类别spinner点击事件
private void initClick() {
//时间事件
spin_date.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
selectDate = date_data[position];
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
//类别事件
spin_type.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
selectType = type_data[position];
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
findViewById(R.id.btn_search).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
selectData();
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search_record);
tv_show=findViewById(R.id.tv_show);
try {
//打开数据库，如果是第一次会创建该数据库，模式为MODE_PRIVATE
sqLiteDatabase = openOrCreateDatabase(DATABASE_NAME, MODE_PRIVATE, null);
//执行创建表的sql语句，虽然每次都调用，但只有首次才创建表
//执行查询
listView = findViewById(R.id.searchlistview);//绑定列表
selectData();
} catch (SQLException e) {
Toast.makeText(this, "数据库异常!", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
ArrayAdapter<String> adapter = new
ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, date_data);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin_date = findViewById(R.id.spin_date);
spin_date.setAdapter(adapter);
ArrayAdapter<String> adapter1 = new
ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, type_data);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin_type = findViewById(R.id.spin_type);
spin_type.setAdapter(adapter1);
initClick();
Button btn_calc=findViewById(R.id.btn_calc);
btn_calc.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
selectSumMoney();
}
});
}
}（6）ManageActivity 类
ManageActivity 类是收支管理页面的 Activity，主要编写用户的收入和支出的业务逻辑，实现收支的增删改查。具体代码实现如下：
java
package com.financial.management;
import androidx.appcompat.app.AppCompatActivity;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AlertDialog;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
public class ManageActivity extends AppCompatActivity {
private SQLiteDatabase sqLiteDatabase = null;
private int selectId = -1;
EditText edt_date, edt_type, edt_money, edt_state;
TextView tv_test;
private static final String DATABASE_NAME = "Test.db";
private static final String TABLE_NAME = "record";
private static final String COLUMN_ID = "id";
private static final String COLUMN_DATE = "date";
private static final String COLUMN_TYPE = "type";
private static final String COLUMN_MONEY = "money";
private static final String COLUMN_STATE = "state";
//创建表
private static final String CREATE_TABLE = "create table if not exists " + TABLE_NAME
+ "(" + COLUMN_ID + " integer primary key autoincrement," + COLUMN_DATE + " text," + COLUMN_TYPE
+ " text," + COLUMN_MONEY + " float," + COLUMN_STATE + " text)";
//自定义的查询方法
private void selectData() {
//遍历整个表
String sql = "select * from " + TABLE_NAME ;
//把查询数据封装到Cursor
Cursor cursor = sqLiteDatabase.rawQuery(sql, null);
ArrayList<Map<String, String>> list = new ArrayList<Map<String, String>>();
//用while循环遍历Cursor，再把它分别放到map中，最后统一存入list中，便于调用
while (cursor.moveToNext()) {
int id = cursor.getInt(cursor.getColumnIndex(COLUMN_ID));
String date = cursor.getString(cursor.getColumnIndex(COLUMN_DATE));
String type = cursor.getString(cursor.getColumnIndex(COLUMN_TYPE));
float money = cursor.getFloat(cursor.getColumnIndex(COLUMN_MONEY));
String state = cursor.getString(cursor.getColumnIndex(COLUMN_STATE));
Map<String, String> map = new HashMap<String, String>();
map.put("id", String.valueOf(id));
map.put("date", date);
map.put("type", type);
map.put("money", String.valueOf(money));
map.put("state", state);
list.add(map);
}
//创建SimpleAdapter
SimpleAdapter simpleAdapter = new SimpleAdapter(getApplicationContext(),
list,
R.layout.record_item_layout,
new String[]{"id", "date", "type", "money", "state"},
new int[]{R.id.list_id, R.id.list_date, R.id.list_type, R.id.list_money, R.id.list_state});
final ListView listView = findViewById(R.id.recordlistview);
//绑定适配器
listView.setAdapter(simpleAdapter);
//设置ListView单击事件
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
ListView tempList = (ListView) parent;
View mView = tempList.getChildAt(position);
TextView list_id = mView.findViewById(R.id.list_id);
TextView list_date = mView.findViewById(R.id.list_date);
TextView list_type = mView.findViewById(R.id.list_type);
TextView list_money = mView.findViewById(R.id.list_money);
TextView list_state = mView.findViewById(R.id.list_state);
String rid = list_id.getText().toString();
String date = list_date.getText().toString();
String type = list_type.getText().toString();
String money = list_money.getText().toString();
String state = list_state.getText().toString();
tv_test.setText(rid);
edt_date.setText(date);
edt_type.setText(type);
edt_money.setText(money);
edt_state.setText(state);
selectId = Integer.parseInt(rid);
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_manage);
try {
sqLiteDatabase = openOrCreateDatabase(DATABASE_NAME, MODE_PRIVATE, null);
sqLiteDatabase.execSQL(CREATE_TABLE);
//执行查询
selectData();
} catch (SQLException e) {
Toast.makeText(this, "数据库异常!", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
tv_test = findViewById(R.id.tv_test);
edt_date = findViewById(R.id.edt_date);
edt_type = findViewById(R.id.edt_type);
edt_money = findViewById(R.id.edt_money);
edt_state = findViewById(R.id.edt_state);
//新增按键
Button btn_add = findViewById(R.id.btn_add);
btn_add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (edt_date.getText().toString().equals("") | edt_type.getText().toString().equals("") | edt_money.getText().toString().equals("") | edt_state.getText().toString().equals("")) {
Toast.makeText(ManageActivity.this, "数据不能为空!", Toast.LENGTH_LONG).show();
return;
}
String date = edt_date.getText().toString();
String type = edt_type.getText().toString();
String money = edt_money.getText().toString();
String state = edt_state.getText().toString();
//定义添加数据的sql语句
String sql = "insert into " + TABLE_NAME + "(" + COLUMN_DATE + "," + COLUMN_TYPE + "," + COLUMN_MONEY + "," + COLUMN_STATE + ") " +
"values('" + date + "','" + type + "','" + money + "','" + state + "')";
//执行sql语句
sqLiteDatabase.execSQL(sql);
Toast.makeText(getApplicationContext(), "新增数据成功!", Toast.LENGTH_LONG).show();
//刷新显示列表
selectData();
//消除数据
tv_test.setText("");
edt_date.setText("");
edt_type.setText("");
edt_money.setText("");
edt_state.setText("");
}
});
//修改按键
Button btn_update = findViewById(R.id.btn_update);
btn_update.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//无选择提示
if (selectId == -1) {
Toast.makeText(getApplicationContext(), "请选择要修改的行!", Toast.LENGTH_LONG).show();
return;
}
//判断是否有空数据
if (edt_date.getText().toString().equals("") | edt_type.getText().toString().equals("") | edt_money.getText().toString().equals("") | edt_state.getText().toString().equals("")) {
Toast.makeText(getApplicationContext(), "数据不能为空!", Toast.LENGTH_LONG).show();
return;
}
String date = edt_date.getText().toString();
String type = edt_type.getText().toString();
String money = edt_money.getText().toString();
String state = edt_state.getText().toString();
//定义修改数据的sql语句
String sql = "update " + TABLE_NAME + " set " + COLUMN_DATE + "='" + date + "',type='" + type + "',money='" + money + "',state='" + state + "' where id=" + selectId;
//执行sql语句
sqLiteDatabase.execSQL(sql);
Toast.makeText(getApplicationContext(), "修改数据成功!", Toast.LENGTH_LONG).show();
//刷新显示列表
selectData();
selectId = -1;
//消除数据
tv_test.setText("");
edt_date.setText("");
edt_type.setText("");
edt_money.setText("");
edt_state.setText("");
}
});
//删除按键
Button btn_delete = findViewById(R.id.btn_delete);
btn_delete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//无选择提示
if (selectId == -1) {
Toast.makeText(ManageActivity.this, "请选择要删除的行!", Toast.LENGTH_LONG).show();
return;
}
//定义删除对话框
AlertDialog dialog = new AlertDialog.Builder(ManageActivity.this).setTitle("删除操作")
.setMessage("确定删除？此操作不可逆，请慎重选择！")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//定义删除的sql语句
String sql = "delete from " + TABLE_NAME + " where id=" + selectId;
//执行sql语句
sqLiteDatabase.execSQL(sql);
//刷新显示列表
Toast.makeText(getApplicationContext(), "删除数据成功!", Toast.LENGTH_LONG).show();
selectData();
selectId = -1;
//清除数据
tv_test.setText("");
edt_date.setText("");
edt_type.setText("");
edt_money.setText("");
edt_state.setText("");
}
}).setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).create();
dialog.show();
}
});
}
}package com.financial.management;
import androidx.appcompat.app.AppCompatActivity;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AlertDialog;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
public class ManageActivity extends AppCompatActivity {
private SQLiteDatabase sqLiteDatabase = null;
private int selectId = -1;
EditText edt_date, edt_type, edt_money, edt_state;
TextView tv_test;
private static final String DATABASE_NAME = "Test.db";
private static final String TABLE_NAME = "record";
private static final String COLUMN_ID = "id";
private static final String COLUMN_DATE = "date";
private static final String COLUMN_TYPE = "type";
private static final String COLUMN_MONEY = "money";
private static final String COLUMN_STATE = "state";
//创建表
private static final String CREATE_TABLE = "create table if not exists " + TABLE_NAME
+ "(" + COLUMN_ID + " integer primary key autoincrement," + COLUMN_DATE + " text," + COLUMN_TYPE
+ " text," + COLUMN_MONEY + " float," + COLUMN_STATE + " text)";
//自定义的查询方法
private void selectData() {
//遍历整个表
String sql = "select * from " + TABLE_NAME ;
//把查询数据封装到Cursor
Cursor cursor = sqLiteDatabase.rawQuery(sql, null);
ArrayList<Map<String, String>> list = new ArrayList<Map<String, String>>();
//用while循环遍历Cursor，再把它分别放到map中，最后统一存入list中，便于调用
while (cursor.moveToNext()) {
int id = cursor.getInt(cursor.getColumnIndex(COLUMN_ID));
String date = cursor.getString(cursor.getColumnIndex(COLUMN_DATE));
String type = cursor.getString(cursor.getColumnIndex(COLUMN_TYPE));
float money = cursor.getFloat(cursor.getColumnIndex(COLUMN_MONEY));
String state = cursor.getString(cursor.getColumnIndex(COLUMN_STATE));
Map<String, String> map = new HashMap<String, String>();
map.put("id", String.valueOf(id));
map.put("date", date);
map.put("type", type);
map.put("money", String.valueOf(money));
map.put("state", state);
list.add(map);
}
//创建SimpleAdapter
SimpleAdapter simpleAdapter = new SimpleAdapter(getApplicationContext(),
list,
R.layout.record_item_layout,
new String[]{"id", "date", "type", "money", "state"},
new int[]{R.id.list_id, R.id.list_date, R.id.list_type, R.id.list_money, R.id.list_state});
final ListView listView = findViewById(R.id.recordlistview);
//绑定适配器
listView.setAdapter(simpleAdapter);
//设置ListView单击事件
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
ListView tempList = (ListView) parent;
View mView = tempList.getChildAt(position);
TextView list_id = mView.findViewById(R.id.list_id);
TextView list_date = mView.findViewById(R.id.list_date);
TextView list_type = mView.findViewById(R.id.list_type);
TextView list_money = mView.findViewById(R.id.list_money);
TextView list_state = mView.findViewById(R.id.list_state);
String rid = list_id.getText().toString();
String date = list_date.getText().toString();
String type = list_type.getText().toString();
String money = list_money.getText().toString();
String state = list_state.getText().toString();
tv_test.setText(rid);
edt_date.setText(date);
edt_type.setText(type);
edt_money.setText(money);
edt_state.setText(state);
selectId = Integer.parseInt(rid);
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_manage);
try {
sqLiteDatabase = openOrCreateDatabase(DATABASE_NAME, MODE_PRIVATE, null);
sqLiteDatabase.execSQL(CREATE_TABLE);
//执行查询
selectData();
} catch (SQLException e) {
Toast.makeText(this, "数据库异常!", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
tv_test = findViewById(R.id.tv_test);
edt_date = findViewById(R.id.edt_date);
edt_type = findViewById(R.id.edt_type);
edt_money = findViewById(R.id.edt_money);
edt_state = findViewById(R.id.edt_state);
//新增按键
Button btn_add = findViewById(R.id.btn_add);
btn_add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (edt_date.getText().toString().equals("") | edt_type.getText().toString().equals("") | edt_money.getText().toString().equals("") | edt_state.getText().toString().equals("")) {
Toast.makeText(ManageActivity.this, "数据不能为空!", Toast.LENGTH_LONG).show();
return;
}
String date = edt_date.getText().toString();
String type = edt_type.getText().toString();
String money = edt_money.getText().toString();
String state = edt_state.getText().toString();
//定义添加数据的sql语句
String sql = "insert into " + TABLE_NAME + "(" + COLUMN_DATE + "," + COLUMN_TYPE + "," + COLUMN_MONEY + "," + COLUMN_STATE + ") " +
"values('" + date + "','" + type + "','" + money + "','" + state + "')";
//执行sql语句
sqLiteDatabase.execSQL(sql);
Toast.makeText(getApplicationContext(), "新增数据成功!", Toast.LENGTH_LONG).show();
//刷新显示列表
selectData();
//消除数据
tv_test.setText("");
edt_date.setText("");
edt_type.setText("");
edt_money.setText("");
edt_state.setText("");
}
});
//修改按键
Button btn_update = findViewById(R.id.btn_update);
btn_update.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//无选择提示
if (selectId == -1) {
Toast.makeText(getApplicationContext(), "请选择要修改的行!", Toast.LENGTH_LONG).show();
return;
}
//判断是否有空数据
if (edt_date.getText().toString().equals("") | edt_type.getText().toString().equals("") | edt_money.getText().toString().equals("") | edt_state.getText().toString().equals("")) {
Toast.makeText(getApplicationContext(), "数据不能为空!", Toast.LENGTH_LONG).show();
return;
}
String date = edt_date.getText().toString();
String type = edt_type.getText().toString();
String money = edt_money.getText().toString();
String state = edt_state.getText().toString();
//定义修改数据的sql语句
String sql = "update " + TABLE_NAME + " set " + COLUMN_DATE + "='" + date + "',type='" + type + "',money='" + money + "',state='" + state + "' where id=" + selectId;
//执行sql语句
sqLiteDatabase.execSQL(sql);
Toast.makeText(getApplicationContext(), "修改数据成功!", Toast.LENGTH_LONG).show();
//刷新显示列表
selectData();
selectId = -1;
//消除数据
tv_test.setText("");
edt_date.setText("");
edt_type.setText("");
edt_money.setText("");
edt_state.setText("");
}
});
//删除按键
Button btn_delete = findViewById(R.id.btn_delete);
btn_delete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//无选择提示
if (selectId == -1) {
Toast.makeText(ManageActivity.this, "请选择要删除的行!", Toast.LENGTH_LONG).show();
return;
}
//定义删除对话框
AlertDialog dialog = new AlertDialog.Builder(ManageActivity.this).setTitle("删除操作")
.setMessage("确定删除？此操作不可逆，请慎重选择！")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//定义删除的sql语句
String sql = "delete from " + TABLE_NAME + " where id=" + selectId;
//执行sql语句
sqLiteDatabase.execSQL(sql);
//刷新显示列表
Toast.makeText(getApplicationContext(), "删除数据成功!", Toast.LENGTH_LONG).show();
selectData();
selectId = -1;
//清除数据
tv_test.setText("");
edt_date.setText("");
edt_type.setText("");
edt_money.setText("");
edt_state.setText("");
}
}).setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).create();
dialog.show();
}
});
}
}（7）User 类
User 类是用户类 Activity，用于获取用户 ID 以及密码。具体代码实现如下：
java
package com.financial.management;
import android.os.Parcel;
import android.os.Parcelable;
public class User implements Parcelable {
private String userId="";
private String userPwd="";
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getUserPwd() {
return userPwd;
}
public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(this.userId);
dest.writeString(this.userPwd);
}
public User() {
}
protected User(Parcel in) {
this.userId = in.readString();
this.userPwd = in.readString();
}
public static final Creator<User> CREATOR = new Creator<User>() {
@Override
public User createFromParcel(Parcel source) {
return new User(source);
}
@Override
public User[] newArray(int size) {
return new User[size];
}
};
}package com.financial.management;
import android.os.Parcel;
import android.os.Parcelable;
public class User implements Parcelable {
private String userId="";
private String userPwd="";
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getUserPwd() {
return userPwd;
}
public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(this.userId);
dest.writeString(this.userPwd);
}
public User() {
}
protected User(Parcel in) {
this.userId = in.readString();
this.userPwd = in.readString();
}
public static final Creator<User> CREATOR = new Creator<User>() {
@Override
public User createFromParcel(Parcel source) {
return new User(source);
}
@Override
public User[] newArray(int size) {
return new User[size];
}
};
}🎵 三、运行结果 Result
到这里，整个系统的设计就差不多要结束啦！现在我们用一段视频来演示整个系统的运行效果 🌈
[video(video-G1g5pVZJ-1626512791305)(type-csdn)(url-https://live.csdn.net/v/embed/170699)(image-https://vedu.csdnimg.cn/50caebd2cd1f477f8b0fd1b205619fd9/snapshots/d066170d085640d482eaa655fcaa17e7-00003.jpg)(title-)]
📈 四、结束语
在拿到这个课题呢，周一首先对课题进行了系统结构设计，结构设计完成之后就到了编码阶段。编码阶段分为两部分进行，先是进行静态页面的楷模，而后到了业务逻辑的编写。
讲到这里，整个系统从设计阶段到编码阶段的整个过程讲解就结束啦！这也算是我学习 Android 的第一个小作品，作品不完美之处较多，后续还将会继续改进~
本文代码已上传至 github，戳此链接可下载代码~
🐣 彩蛋 One More Thing
(:不合理设计
- 年月份数据写的太固定了，没有可扩展性
- 日期应该用日期选择器来做，而不应该是以文本的形式
- 收入和支出应该以单选框来进行选择，而不应该是文本的形式
- ……