android订餐系统代码 基于安卓的订餐系统

基于Android的手机订餐系统设计与实现

该系统预计实现的功能有：

话不多说-开搞–先给大家看一下成品：

Android的手机订餐的实现

文章目录

• 基于Android的手机订餐系统设计与实现
• 前言
• 一、SQL数据库表的建立。

• 1.建立User.class
• 2.建立UserDatabase.class（数据库表建立）
• 3.建立UserService.class(服务端)

• 二、登录注册页面实现

• 1.注册页面的实现

• (1).创建RegistrationActivity
• (2).对应的*activity_registration*
• (3)涉及到的drawble文件ios_edit_box_bkg
• (4)涉及到的drawble文件rect_ios_edit_box_bkg_focus
• (5)涉及到的drawble文件rect_ios_edit_box_bkg_normal
• (6)涉及到的drawble文件setbar_btn

• 2.登录页面的实现

• (1)MainActivity.class
• (2)*activity_main*.class

• 总结

• 后续还将继续完成订餐系统的实现

---

前言

提示：设计一个基于Android的手机订餐系统。
该系统在Android环境下开发，以Android Studio作为开发工具，使用Java语言作为开发语言，Sql数据库来管理和储存数据。

---

提示：以下是本篇文章正文内容，下面案例可供参考

一、SQL数据库表的建立。

Android网络存储，用到的是数据库是SQL server

1.建立User.class

public class User {
    private int id;
    private String username;
    private String password;
    private String balance;     //余额
    private String address;
    private String sex;
    private String phone;

    public int getId() {
        return id;
    }

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

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getBalance() {
        return balance;
    }

    public void setBalance(String balance) {
        this.balance = balance;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getSex() {
        return sex;
    }

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

    public String getPhone() {
        return phone;
    }

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

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", balance='" + balance + '\'' +
                ", address='" + address + '\'' +
                ", sex='" + sex + '\'' +
                ", phone='" + phone + '\'' +
                '}';
    }

2.建立UserDatabase.class（数据库表建立）

public class UserDatabase extends SQLiteOpenHelper {

    static String name="user.db";

    static int dbVersion=1;
    public UserDatabase(Context context) {
        super(context, name, null, dbVersion);
    }
    //只在创建的时候用一次
    public void onCreate(SQLiteDatabase db) {
        String sql="create table user(id integer primary key autoincrement,username varchar(20),password varchar(20), balance varchar(20),address varchar(20),sex varchar(20),phone varchar(20))";
        db.execSQL(sql);
    }
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    }
}

3.建立UserService.class(服务端)

public class UserService {
    private UserDatabase dbHelper;

    public UserService(Context context) {
        dbHelper = new UserDatabase(context);
    }

    //登录用
    public boolean login(String username, String password) {
        SQLiteDatabase sdb = dbHelper.getReadableDatabase();
        String sql = "select * from user where username=? and password=?";
        Cursor cursor = sdb.rawQuery(sql, new String[]{username, password});
        if (cursor.moveToFirst() == true) {
            cursor.close();
            return true;
        }
        return false;
    }

    //注册用
    public boolean register(User user) {
        SQLiteDatabase sdb = dbHelper.getReadableDatabase();
        String sql = "insert into user(username,password,balance,address,sex,phone) values(?,?,?,?,?,?)";
        Object obj[] = {user.getUsername(), user.getPassword(), user.getBalance(), user.getAddress(), user.getSex(), user.getPhone()};
        sdb.execSQL(sql, obj);
        return true;
    }
}

二、登录注册页面实现

1.注册页面的实现

代码如下：
里面涉及到地址选择的三级联动，把库添加到build.gradle中

dependencies {
  //城市选择
    implementation 'liji.library.dev:citypickerview:1.1.0'
    }

(1).创建RegistrationActivity

public class RegistrationActivity extends AppCompatActivity {

    @BindView(R.id.text_about)
    TextView textAbout;
    @BindView(R.id.edit_userName)
    EditText editUserName;
    @BindView(R.id.edit_password)
    EditText editPassword;
    @BindView(R.id.edit_phone)
    EditText editPhone;
    @BindView(R.id.edit_address)
    TextView editAddress;
    @BindView(R.id.edit_particular)
    EditText editParticular;
    @BindView(R.id.nan)
    RadioButton nan;
    @BindView(R.id.woman)
    RadioButton woman;
    @BindView(R.id.sexRegister)
    RadioGroup sexRegister;
    @BindView(R.id.btn_register)
    Button btnRegister;
    private CityPicker mCP;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_registration);
        ButterKnife.bind(this);
    }

    @OnClick({R.id.text_about, R.id.btn_register, R.id.edit_address})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.text_about:

                break;
            case R.id.btn_register:
                String name = editUserName.getText().toString().trim();
                String pass = editPassword.getText().toString().trim();
                String phone = editPhone.getText().toString().trim();
                String address = editAddress.getText().toString().trim();
                String sexstr = ((RadioButton) RegistrationActivity.this.findViewById(sexRegister.getCheckedRadioButtonId())).getText().toString();
                int num;
                UserDatabase userDatabase = new UserDatabase(this);
                SQLiteDatabase database = userDatabase.getReadableDatabase();
                @SuppressLint("Recycle") Cursor cursor = database.query("user", null, "username=?", new String[]{name}, null, null, null, null);
                num = cursor.getCount();
                if(num >0){
                    Toast.makeText(this,"该账号已被注册,请尝试更换账号注册",Toast.LENGTH_SHORT).show();
                }else {
                    UserService uService = new UserService(RegistrationActivity.this);
                    User user = new User();
                    user.setUsername(name);
                    user.setPassword(pass);
                    user.setPhone(phone);
                    user.setAddress(address + editParticular.getText().toString().trim());
                    user.setSex(sexstr);
                    user.setBalance("0");
                    uService.register(user);
                    Toast.makeText(RegistrationActivity.this, "注册成功", Toast.LENGTH_SHORT).show();
                    Intent intent = new Intent(RegistrationActivity.this, MainActivity.class);
                    startActivity(intent);
                }
                break;
            case R.id.edit_address:
                mYunCityPicher();
                mCP.show();
                break;
        }
    }



    public void mYunCityPicher() {
        //地址选择
        //文字的颜色
        //滑轮文字的颜色
        //省滑轮是否循环显示
        //市滑轮是否循环显示
        //地区（县）滑轮是否循环显示
        //滑轮显示的item个数
        //滑轮item间距
        mCP = new CityPicker.Builder(RegistrationActivity.this)
                .textSize(20)
                //地址选择
                .title("地址选择")
                .backgroundPop(0xa0000000)
                //文字的颜色
                .titleBackgroundColor("#0CB6CA")
                .titleTextColor("#000000")
                .backgroundPop(0xa0000000)
                .confirTextColor("#000000")
                .cancelTextColor("#000000")
                .province("xx省")
                .city("xx市")
                .district("xx区")
                //滑轮文字的颜色
                .textColor(Color.parseColor("#000000"))
                //省滑轮是否循环显示
                .provinceCyclic(true)
                //市滑轮是否循环显示
                .cityCyclic(false)
                //地区（县）滑轮是否循环显示
                .districtCyclic(false)
                //滑轮显示的item个数
                .visibleItemsCount(7)
                //滑轮item间距
                .itemPadding(10)
                .onlyShowProvinceAndCity(false)
                .build();
        //监听
        mCP.setOnCityItemClickListener(new CityPicker.OnCityItemClickListener() {
            @SuppressLint("SetTextI18n")
            @Override
            public void onSelected(String... citySelected) {
                //省
                String province = citySelected[0];
                //市
                String city = citySelected[1];
                //区。县。（两级联动，必须返回空）
                String district = citySelected[2];
                //邮证编码
                String code = citySelected[3];
                editAddress.setText(province + city + district);
            }

            @Override
            public void onCancel() {


            }
        });
    }
}

(2).对应的activity_registration

代码如下（示例）：
背景图可以任意换一张

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:background="@mipmap/bj"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/text_about"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="20dp"
            android:layout_marginTop="15dp"
            android:text="关于"
            android:textColor="@color/dodgerblue"
            android:textSize="16sp"
            tools:ignore="HardcodedText" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="15dp"
            android:text="用户注册"
            android:paddingEnd="60dp"
            android:gravity="center"
            android:textColor="@color/dodgerblue"
            android:textSize="20sp"
            tools:ignore="HardcodedText,RtlSymmetry" />


    </LinearLayout>

    <ImageView
        android:layout_width="87dp"
        android:layout_height="86dp"
        android:layout_marginTop="20dp"
        android:src="@mipmap/img_login"
        tools:ignore="ContentDescription" />

    <ScrollView
        android:layout_width="wrap_content"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:orientation="vertical">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:paddingLeft="25dp"
                android:paddingRight="25dp">

                <EditText
                    android:id="@+id/edit_userName"
                    android:layout_width="match_parent"
                    android:layout_height="35dp"
                    android:background="@drawable/ios_edit_box_bkg"
                    android:gravity="center"
                    android:hint="请输入账号"
                    android:inputType="number"
                    tools:ignore="Autofill,HardcodedText" />

            </RelativeLayout>

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp"
                android:paddingLeft="25dp"
                android:paddingRight="25dp">

                <EditText
                    android:id="@+id/edit_password"
                    android:layout_width="match_parent"
                    android:layout_height="35dp"
                    android:background="@drawable/ios_edit_box_bkg"
                    android:gravity="center"
                    android:hint="请输入密码"
                    android:inputType="textPassword"
                    tools:ignore="Autofill,HardcodedText" />

            </RelativeLayout>


            <RelativeLayout

                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp"
                android:paddingLeft="25dp"
                android:paddingRight="25dp">

                <EditText
                    android:id="@+id/edit_phone"
                    android:layout_width="match_parent"
                    android:layout_height="35dp"
                    android:background="@drawable/ios_edit_box_bkg"
                    android:gravity="center"
                    android:hint="请输入电话"
                    android:inputType="number"
                    tools:ignore="Autofill,HardcodedText,TextFields" />

            </RelativeLayout>

            <RelativeLayout

                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp"
                android:paddingLeft="25dp"
                android:paddingRight="25dp">

                <TextView
                    android:id="@+id/edit_address"
                    android:layout_width="match_parent"
                    android:layout_height="35dp"
                    android:background="@drawable/ios_edit_box_bkg"
                    android:gravity="center"
                    android:hint="请输入地址"
                    android:textSize="18sp"
                    tools:ignore="HardcodedText" />

            </RelativeLayout>

            <RelativeLayout

                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp"
                android:paddingLeft="25dp"
                android:paddingRight="25dp">

                <EditText
                    android:id="@+id/edit_particular"
                    android:layout_width="match_parent"
                    android:layout_height="35dp"
                    android:background="@drawable/ios_edit_box_bkg"
                    android:gravity="center"
                    android:hint="请填写详细收货地址"
                    android:textSize="18sp"
                    tools:ignore="Autofill,HardcodedText,TextFields" />

            </RelativeLayout>

            <RelativeLayout

                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp"
                android:paddingLeft="25dp"
                android:paddingRight="25dp">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:text="性别："
                    android:textSize="20dp"
                    tools:ignore="HardcodedText,SpUsage" />

                <RadioGroup
                    android:id="@+id/sexRegister"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="55dp"
                    android:checkedButton="@+id/nan"
                    android:orientation="horizontal">

                    <RadioButton
                        android:id="@+id/nan"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="先生"
                        android:buttonTint="@color/royalblue"
                        tools:ignore="HardcodedText" />

                    <RadioButton
                        android:id="@+id/woman"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="女士"
                        tools:ignore="HardcodedText" />
                </RadioGroup>
            </RelativeLayout>

            <RelativeLayout

                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp"
                android:paddingLeft="25dp"
                android:paddingRight="25dp">

                <Button
                    android:id="@+id/btn_register"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:width="1dp"
                    android:background="@drawable/setbar_btn"
                    android:text="注册"
                    android:textColor="@color/white"
                    tools:ignore="HardcodedText" />

            </RelativeLayout>
        </LinearLayout>
    </ScrollView>
</LinearLayout>

点击完按钮之后，数据就添加到了数据库中了

(3)涉及到的drawble文件ios_edit_box_bkg

<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android">
    <selector>
        <item
            android:drawable="@drawable/rect_ios_edit_box_bkg_focus"
            android:state_focused="true" />
        <item android:drawable="@drawable/rect_ios_edit_box_bkg_normal" />
    </selector>
</inset>

(4)涉及到的drawble文件rect_ios_edit_box_bkg_focus

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <!-- 填充颜色 -->
    <solid android:color="#E3E3E4"></solid>

    <!-- 矩形的圆角半径 -->
    <corners android:radius="17dp" />

</shape>

(5)涉及到的drawble文件rect_ios_edit_box_bkg_normal

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <!-- 填充颜色 -->
    <solid android:color="#F3F3F4"></solid>

    <!-- 矩形的圆角半径 -->
    <corners android:radius="17dp" />

</shape>

(6)涉及到的drawble文件setbar_btn

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
    <!-- 背景色 -->
    <solid android:color="@color/three573fc"/>
    <!-- 边框色 -->
    <stroke android:width="1dip" android:color="@color/f0f0f0" />
    <!--  圆角的弧度 -->
    <corners android:radius="50dp"/>
</shape>

2.登录页面的实现

(1)MainActivity.class

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.edit_account)
    EditText editAccount;
    @BindView(R.id.edit_password)
    EditText editPassword;
    @BindView(R.id.btn_login)
    Button btnLogin;
    @BindView(R.id.btn_register)
    Button btnRegister;
    @BindView(R.id.btn_forget_pwd)
    Button btnForgetPwd;

    @BindView(R.id.btn_shop_login)
    Button btnShopLogin;

    public static String userId;//声明为全局变量，方面后续调用
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
      
    }

    @OnClick({R.id.btn_login, R.id.btn_register, R.id.btn_forget_pwd,R.id.btn_shop_login})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.btn_login:
                String userName = editAccount.getText().toString();//获取文本框的数据
                String passWord = editPassword.getText().toString();
                Log.i("TAG", userName + "_" + passWord);
                UserService uService = new UserService(this);
                boolean flag = uService.login(userName, passWord);
                if (flag) {
                    Toast.makeText(MainActivity.this, "登录成功", Toast.LENGTH_SHORT).show();
                    Intent intent2 = new Intent(MainActivity.this, MenuActivity.class);
                    intent2.putExtra("name", userName);
                    userId = userName;
                    startActivity(intent2);
                } else {
                    Toast.makeText(MainActivity.this, "登录失败", Toast.LENGTH_SHORT).show();
                }
                break;
            case R.id.btn_register:
                Intent intent = new Intent(MainActivity.this, RegistrationActivity.class);
                startActivity(intent);
                break;
            case R.id.btn_forget_pwd:
                Toast.makeText(MainActivity.this, "暂时不可用", Toast.LENGTH_SHORT).show();
                break;
            case R.id.btn_shop_login:
                Intent intent1 = new Intent(MainActivity.this, Main2Activity.class);
                startActivity(intent1);
                break;
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }


}

(2)activity_main.class

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@mipmap/bj"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"

        >

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="欢迎使用订餐啦"
            android:textColor="@color/color_ff3573fc"
            android:textSize="35dp"
            tools:ignore="HardcodedText,SpUsage" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:gravity="center">

        <ImageView
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_gravity="center"
            android:src="@mipmap/dl"
            tools:ignore="ContentDescription" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="42dp"
        android:layout_marginLeft="30dp"
        android:layout_marginTop="30dp"
        android:layout_marginRight="30dp">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingLeft="15dp"
            android:text="账号："
            android:textColor="#ff333333"
            android:textSize="18sp"
            tools:ignore="HardcodedText,RtlHardcoded,RtlSymmetry" />

        <EditText
            android:id="@+id/edit_account"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginLeft="15dp"
            android:background="@null"
            android:gravity="center_vertical"
            android:hint="请输入账号"
            android:inputType="number"
            android:text="8888"
            android:maxLength="6"
            android:maxLines="1"
            android:textColor="@color/threethree"
            android:textColorHint="@color/nightnight"
            android:textSize="16sp"
            tools:ignore="Autofill,HardcodedText,RtlHardcoded" />
    </LinearLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="1px"
        android:layout_marginLeft="45dp"
        android:layout_marginTop="3dp"
        android:layout_marginRight="41dp"
        android:background="@color/svend"
        tools:ignore="RtlHardcoded" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="42dp"
        android:layout_marginLeft="30dp"
        android:layout_marginTop="16dp"
        android:layout_marginRight="30dp">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingLeft="15dp"
            android:text="密码："
            android:textColor="#ff333333"
            android:textSize="18sp"
            tools:ignore="HardcodedText,RtlHardcoded,RtlSymmetry" />

        <EditText
            android:id="@+id/edit_password"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginLeft="15dp"
            android:background="@null"
            android:gravity="center_vertical"
            android:hint="请输入密码"
            android:inputType="textPassword"
            android:maxLength="12"
            android:text="8888"
            android:maxLines="1"
            android:textColor="@color/threethree"
            android:textColorHint="@color/nightnight"
            android:textSize="16sp"
            tools:ignore="Autofill,HardcodedText,RtlHardcoded" />
    </LinearLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="1px"
        android:layout_marginStart="45dp"
        android:layout_marginTop="3dp"
        android:layout_marginEnd="41dp"
        android:background="@color/svend" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginTop="50dp"
        android:layout_marginBottom="30dp"
        android:orientation="vertical"
        tools:ignore="ObsoleteLayoutParam">

        <Button
            android:id="@+id/btn_login"
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:layout_gravity="center_horizontal"
            android:layout_marginLeft="38dp"
            android:layout_marginRight="38dp"
            android:alpha="1"
            android:background="@drawable/setbar_btn"
            android:gravity="center"
            android:text="账号登录"
            android:textColor="@color/white"
            android:textSize="18sp"
            android:textStyle="bold"
            tools:ignore="HardcodedText" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="10dp"
        android:orientation="vertical"
        tools:ignore="ObsoleteLayoutParam">

        <Button
            android:id="@+id/btn_shop_login"
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:layout_gravity="center_horizontal"
            android:layout_marginLeft="38dp"
            android:layout_marginRight="38dp"
            android:alpha="1"
            android:background="@drawable/setbar_btn"
            android:gravity="center"
            android:text="商家登录"
            android:textColor="@color/white"
            android:textSize="18sp"
            android:textStyle="bold"
            tools:ignore="HardcodedText" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="48dp"
        android:gravity="center"
        tools:ignore="ObsoleteLayoutParam">

        <Button
            android:id="@+id/btn_register"
            style="?android:attr/borderlessButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@null"
            android:text="新用户注册"
            android:textColor="#3573FC"
            android:textSize="14sp"
            tools:ignore="HardcodedText" />

        <View
            android:layout_width="1dp"
            android:layout_height="14dp"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            android:background="@color/ff333333" />

        <Button
            android:id="@+id/btn_forget_pwd"
            style="?android:attr/borderlessButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@null"
            android:text="忘记密码"
            android:textColor="@color/ff333333"
            android:textSize="14sp"
            tools:ignore="HardcodedText" />

    </LinearLayout>
</LinearLayout>

---

总结

这里对文章第一部分的总结：

以上就是今天要讲的内容，本文仅仅简单介绍了SQL数据库的使用，以及用户的登录注册，和制作的一些前期准备工作，下篇文章将写，如何构建RadioGroup控制的滑动页面以及CardView中加载图片文字列表

如下图：

RadioGroup的控制滑动页面

CardView加载图片文字数据