2024.6.14

第七十三天

所花时间：2小时

代码量：400+

博客量：1

了解到的知识点：会议——登陆注册

package com.example.huiyi;

import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import com.example.huiyi.dao.userDao;
import com.example.huiyi.entity.user;

/**
 * function：连接页面加载首页
 */
public class MainActivity extends AppCompatActivity {
    private static final String TAG = "mysql-party-MainActivity";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void reg(View view){
        startActivity(new Intent(getApplicationContext(),RegisterActivity.class));
    }


    /**
     * function: 登录
     * */
    public void login(View view){

        EditText EditTextAccount = findViewById(R.id.studentid);
        EditText EditTextPhone = findViewById(R.id.phone);


        new Thread(){
            @Override
            public void run() {
                userDao userDao = new userDao();
                int msg = userDao.login(EditTextAccount.getText().toString(),EditTextPhone.getText().toString());
                SharedPreferences sharedPref = getSharedPreferences("app_prefs", Context.MODE_PRIVATE);
                SharedPreferences.Editor editor = sharedPref.edit();
                editor.putString("username", EditTextAccount.getText().toString());
                editor.apply();
                hand1.sendEmptyMessage(msg);
                if(msg == 1){

                }
            }
        }.start();
    }

    @SuppressLint("HandlerLeak")
    final Handler hand1 = new Handler() {
        @Override
        public void handleMessage(Message msg) {

            if (msg.what == 0){
                Toast.makeText(getApplicationContext(), "登录失败", Toast.LENGTH_LONG).show();
            } else if (msg.what == 1) {
                Toast.makeText(getApplicationContext(), "登录成功", Toast.LENGTH_LONG).show();
//                实验导入用户名
                // 在用户登录成功后保存用户名到 SharedPreferences 中
//               SharedPreferences sharedPreferences = getSharedPreferences("userData", MODE_PRIVATE);
//               SharedPreferences.Editor editor = sharedPreferences.edit();
//               editor.putString("username",EditTextAccount.getText().toString() );
//               editor.apply();



                //试验一下！！！！！！！！！！！！！！！！！！！！！！
                startActivity(new Intent(getApplicationContext(),MeetingActivity.class));
            } else if (msg.what == 2){
                Toast.makeText(getApplicationContext(), "密码错误", Toast.LENGTH_LONG).show();
            } else if (msg.what == 3){
                Toast.makeText(getApplicationContext(), "账号不存在", Toast.LENGTH_LONG).show();
            }
        }
    };
}

<?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"
        tools:layout_editor_absoluteX="219dp"
        tools:layout_editor_absoluteY="207dp"
        android:padding="50dp"

        >

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


            <TextView
                android:id="@+id/textView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:textSize="15sp"
                android:text="用户名：" />

            <EditText
                android:id="@+id/studentid"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="text"
                android:text="" />
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">


            <TextView
                android:id="@+id/textView2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:textSize="15sp"
                android:text="电话：" />

            <EditText
                android:id="@+id/phone"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="phone"
                android:text="" />
        </LinearLayout>

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



        </LinearLayout>

        <Button
            android:layout_marginTop="50dp"
            android:id="@+id/button2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="登录"
            android:onClick="login"
            />

        <Button
            android:id="@+id/button3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:onClick="reg"
            android:text="注册" />
    </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.huiyi;

import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import com.example.huiyi.dao.userDao;
import com.example.huiyi.entity.user;

/**
 * function：连接注册页面
 */
public class RegisterActivity extends AppCompatActivity {
    private static final String TAG = "mysql-party-register";

    EditText name = null;
    EditText sex = null;
    EditText department = null;
    EditText phone = null;
    EditText address = null;

    //    @SuppressLint("MissingInflatedId")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        name = findViewById(R.id.name);
        sex = findViewById(R.id.sex);
        department = findViewById(R.id.department);
        phone = findViewById(R.id.phone);
        address = findViewById(R.id.address);
    }


    public void register(View view){


        String name1 = name.getText().toString();
        String sex1 = sex.getText().toString();
        String department1 = department.getText().toString();
        String phone1 = phone.getText().toString();
        String address1 = address.getText().toString();


        user user = new user();

        user.setUserName(name1);
        user.setSex(sex1);
        user.setDepartment(department1);
        user.setPhone(phone1);
        user.setPosition(address1);


        new Thread(){
            @Override
            public void run() {

                int msg = 0;

                userDao userDao = new userDao();

                user uu = userDao.findStudent(user.getUserName());
                if(uu != null){
                    msg = 1;
                }
                else{
                    boolean flag = userDao.register(user);
                    if(flag){
                        msg = 2;
                    }
                }
                hand.sendEmptyMessage(msg);

            }
        }.start();


    }
    @SuppressLint("HandlerLeak")
    final Handler hand = new Handler()
    {
        public void handleMessage(Message msg) {
            if(msg.what == 0) {
                Toast.makeText(getApplicationContext(),"注册失败",Toast.LENGTH_LONG).show();
            } else if(msg.what == 1) {
                Toast.makeText(getApplicationContext(),"该账号已经存在，请换一个账号",Toast.LENGTH_LONG).show();
            } else if(msg.what == 2) {
                Toast.makeText(getApplicationContext(), "注册成功", Toast.LENGTH_LONG).show();
                Intent intent = new Intent();
                //将想要传递的数据用putExtra封装在intent中
                intent.putExtra("a","注册");
                setResult(RESULT_CANCELED,intent);
                startActivity(new Intent(getApplicationContext(),MainActivity.class));
                finish();
            }
        }
    };
}

<?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"
        tools:layout_editor_absoluteX="219dp"
        tools:layout_editor_absoluteY="207dp"
        android:padding="50dp"

        >

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


            <TextView
                android:id="@+id/textView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:textSize="15sp"
                android:text="姓名:" />

            <EditText
                android:id="@+id/name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="text"
                />
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">


            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:textSize="15sp"
                android:text="性别：" />

            <EditText
                android:id="@+id/sex"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="textPersonName"
                />
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">


            <TextView
                android:id="@+id/textView2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"

                android:textSize="15sp"
                android:text="部门："

                />

            <EditText
                android:id="@+id/department"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="textVisiblePassword"
                />
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">


            <TextView
                android:id="@+id/textView3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"

                android:textSize="15sp"
                android:text="手机号码："

                />

            <EditText
                android:id="@+id/phone"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="text"
                />
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">


            <TextView
                android:id="@+id/textView4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"

                android:textSize="15sp"
                android:text="家庭住址："

                />

            <EditText
                android:id="@+id/address"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="text"
                />
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

        </LinearLayout>

        <Button
            android:layout_marginTop="50dp"
            android:id="@+id/button2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="注册"
            android:onClick="register"
            />
    </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>