2024.3.18（周一）进度

完成连接远程数据库的增，完成了2个文件，代码量为200行。博客园数量：一篇

package com.example.learningrecords;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.example.learningrecords.R;
import com.example.learningrecords.dao.StudentDao;

public class MainActivity extends AppCompatActivity {

    private Button signUpButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        signUpButton = findViewById(R.id.SignUpButton);

        signUpButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 创建一个意图对象，用于启动注册页面的活动
                Intent intent = new Intent(MainActivity.this, SignUpActivity.class);
                // 启动注册页面的活动
                startActivity(intent);
            }
        });
    }


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

        EditText EditTextAccount = findViewById(R.id.UserNameEdit);
        EditText EditTextPassword = findViewById(R.id.PassWordEdit);
        String account = EditTextAccount.getText().toString();
        String password = EditTextPassword.getText().toString();


        // 检查是否为教师账号，如果是则直接跳转到教师界面
        if (account.equals("teacher") && password.equals("teacher")) {
            Intent intent = new Intent(MainActivity.this, teacher.class);
            startActivity(intent);
        } else {
            new Thread() {
                @Override
                public void run() {
                    StudentDao studentDao = new StudentDao();
                    int msg = studentDao.login(EditTextAccount.getText().toString(), EditTextPassword.getText().toString());
                    hand1.sendEmptyMessage(msg);
                }
            }.start();
        }

    }

    @SuppressLint("HandlerLeak")
    final Handler hand1 = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (msg.what == 1) {
                Toast.makeText(getApplicationContext(), "登录成功", Toast.LENGTH_LONG).show();
                // 登录成功后启动新的活动
                startActivity(new Intent(MainActivity.this, MainActivity2.class));
            } else if (msg.what == 0) {
                Toast.makeText(getApplicationContext(), "登录失败", Toast.LENGTH_LONG).show();
            } 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();
            }
        }
    };

}

package com.example.learningrecords;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import androidx.appcompat.app.AppCompatActivity;

import com.example.learningrecords.R;
import com.example.learningrecords.dao.PlanningDao;
import com.example.learningrecords.dao.StudentDao;
import com.example.learningrecords.entity.StatisticData;
import com.example.learningrecords.entity.Student;

import java.util.ArrayList;


public class MainActivity2 extends AppCompatActivity {

    private Button goalAnalysisButton;
    private Button dailyCheckInButton;
    private Button statisticsButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        goalAnalysisButton = findViewById(R.id.GoalAnalysisButton);
        dailyCheckInButton = findViewById(R.id.DailyCheckInButton);
        statisticsButton = findViewById(R.id.StatisticsButton);

        // 目标与分析按钮点击事件
        goalAnalysisButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity2.this, GoalAnalysis.class);
                startActivity(intent);
            }
        });

        // 每日打卡按钮点击事件
        dailyCheckInButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity2.this, DailyCheckIn.class);
                startActivity(intent);
            }
        });
    }


        // 处理统计与分析按钮点击事件
        public void queryStatisticsData(View view) {
            new Thread() {
                @Override
                public void run() {
                    // 在后台线程中执行查询统计数据的操作

                    // 获取当前登录用户的 studentId
                    String studentId = StudentDao.getCurrentLoggedInUserId();

                    // 获取学生对象
                    StudentDao studentDao = new StudentDao();
                    Student student = studentDao.findStudent(studentId);
                    if (student != null) {
                        // 获取 setGoal、setRecord 和完成度百分比
                        int setGoal = student.getSetGoal();
                        int setRecord = student.getSetRecord();
                        double completionPercentage = PlanningDao.calculateCompletionPercentage(studentId);

                        // 创建一个列表存储数据
                        ArrayList<StatisticData> statisticDataList = new ArrayList<>();
                        statisticDataList.add(new StatisticData(studentId, setGoal, setRecord, completionPercentage));

                        // 将数据传递给 Statistics 类（com.example.demo3 包下）
                        Intent intent = new Intent(MainActivity2.this, Statistics.class);
                        intent.putParcelableArrayListExtra("statisticDataList", statisticDataList);
                        startActivity(intent);
                    }
                }
            }.start();
        }

}