学习进度条

Android 学习打卡系统之每日总结与打卡记录添加
今日学习时间：2.5 小时
今日代码量：250 行
今日博客：1 篇（Android 学习打卡系统之每日总结与打卡记录添加）

一、核心知识点

每日总结添加

在AddSummaryActivity.java中，用户可以添加每日总结。通过Retrofit调用后端 API，将总结信息发送到服务器。

String blogUrl = etBlogUrl.getText().toString().trim();
if (!blogUrl.isEmpty()) {
    if (!blogUrl.startsWith("http://") && !blogUrl.startsWith("https://")) {
        blogUrl = "http://" + blogUrl;
    }
    DailySummary summary = new DailySummary();
    summary.setUserId(Long.valueOf(studentId));
    summary.setSummaryDate(currentDate);
    summary.setBlogUrl(blogUrl);
    ApiService apiService = RetrofitClient.getClient().create(ApiService.class);
    Call<String> call = apiService.addDailySummary(authToken, summary);
    call.enqueue(new Callback<String>() {
        @Override
        public void onResponse(Call<String> call, Response<String> response) {
            if (response.isSuccessful()) {
                Toast.makeText(AddSummaryActivity.this, response.body(), Toast.LENGTH_SHORT).show();
                loadHistorySummaries(); 
                etBlogUrl.setText(""); 
            } else {
                Toast.makeText(AddSummaryActivity.this, "添加失败: " + response.message(), Toast.LENGTH_SHORT).show();
            }
        }
        @Override
        public void onFailure(Call<String> call, Throwable t) {
            Toast.makeText(AddSummaryActivity.this, "网络错误: " + t.getMessage(), Toast.LENGTH_SHORT).show();
        }
    });
}

打卡记录添加

在AddRecordActivity.java中，用户可以添加编程打卡记录。同样使用Retrofit与后端 API 交互。

String pspStage = etPspStage.getText().toString().trim();
String content = etContent.getText().toString().trim();
String timeSpentStr = etTimeSpent.getText().toString().trim();
if (pspStage.isEmpty()) {
    Toast.makeText(this, "请输入PSP阶段", Toast.LENGTH_SHORT).show();
    return;
}
ProgrammingRecord record = new ProgrammingRecord();
record.setUserId(String.valueOf(Long.parseLong(studentId)));
record.setRecordDate(currentDate);
record.setPspStage(pspStage);
record.setContent(content);
if (!timeSpentStr.isEmpty()) {
    record.setTimeSpent(Integer.parseInt(timeSpentStr));
}
ApiService apiService = RetrofitClient.getClient().create(ApiService.class);
Call<String> call = apiService.addProgrammingRecord(token, record);
call.enqueue(new Callback<String>() {
    @Override
    public void onResponse(Call<String> call, Response<String> response) {
        if (response.isSuccessful()) {
            Toast.makeText(AddRecordActivity.this, response.body(), Toast.LENGTH_SHORT).show();
            finish();
        } else {
            Toast.makeText(AddRecordActivity.this, "添加失败: " + response.message(), Toast.LENGTH_SHORT).show();
        }
    }
    @Override
    public void onFailure(Call<String> call, Throwable t) {
        Toast.makeText(AddRecordActivity.this, "网络错误: " + t.getMessage(), Toast.LENGTH_SHORT).show();
    }
});

二、安全注意事项

URL 格式检查：在添加每日总结时，对用户输入的博客 URL 进行格式检查，确保以http://或https://开头。
数据验证：在添加打卡记录时，对 PSP 阶段和时间输入进行验证，避免无效数据的提交。

三、今日实践成果

实现了每日总结和打卡记录的添加功能，添加成功后会刷新历史记录。
遇到的问题：
网络请求返回错误信息（解决：检查 API 接口和服务器端代码）
数据提交失败（解决：检查数据格式和请求头信息）
相关代码：

package com.example.study0327;

import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.example.study0327.api.ApiService;
import com.example.study0327.api.RetrofitClient;
import com.example.study0327.modules.DailySummary;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class AddSummaryActivity extends AppCompatActivity {
    private EditText etBlogUrl;
    private Button btnAddSummary;
    private LinearLayout summaryListLayout;
    private String studentId;
    private String authToken;

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

        // 获取用户登录信息
        SharedPreferences prefs = getSharedPreferences("user_prefs", MODE_PRIVATE);
        studentId = prefs.getString("student_id", "");
        authToken = "Bearer " + prefs.getString("auth_token", "");

        if (studentId.isEmpty() || authToken.equals("Bearer ")) {
            Toast.makeText(this, "请先登录", Toast.LENGTH_SHORT).show();
            finish();
            return;
        }

        etBlogUrl = findViewById(R.id.etBlogUrl);
        btnAddSummary = findViewById(R.id.btnAddSummary);
        summaryListLayout = findViewById(R.id.summaryListLayout);

        // 获取当前日期
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
        String currentDate = sdf.format(new Date());

        // 加载历史记录
        loadHistorySummaries();

        btnAddSummary.setOnClickListener(v -> {
            String blogUrl = etBlogUrl.getText().toString().trim();
            if (blogUrl.isEmpty()) {
                Toast.makeText(this, "请输入博客链接", Toast.LENGTH_SHORT).show();
                return;
            }

            // 检查URL格式，自动添加http://前缀
            if (!blogUrl.startsWith("http://") && !blogUrl.startsWith("https://")) {
                blogUrl = "http://" + blogUrl;
            }

            DailySummary summary = new DailySummary();
            summary.setUserId(Long.valueOf(studentId));
            summary.setSummaryDate(currentDate);
            summary.setBlogUrl(blogUrl);

            ApiService apiService = RetrofitClient.getClient().create(ApiService.class);
            Call<String> call = apiService.addDailySummary(authToken, summary);

            call.enqueue(new Callback<String>() {
                @Override
                public void onResponse(Call<String> call, Response<String> response) {
                    if (response.isSuccessful()) {
                        Toast.makeText(AddSummaryActivity.this, response.body(), Toast.LENGTH_SHORT).show();
                        loadHistorySummaries(); // 刷新历史记录
                        etBlogUrl.setText(""); // 清空输入框
                    } else {
                        Toast.makeText(AddSummaryActivity.this, "添加失败: " + response.message(), Toast.LENGTH_SHORT).show();
                    }
                }

                @Override
                public void onFailure(Call<String> call, Throwable t) {
                    Toast.makeText(AddSummaryActivity.this, "网络错误: " + t.getMessage(), Toast.LENGTH_SHORT).show();
                }
            });
        });
    }

    private void loadHistorySummaries() {
        ApiService apiService = RetrofitClient.getClient().create(ApiService.class);
        Call<List<DailySummary>> call = apiService.getDailySummaries(authToken);

        call.enqueue(new Callback<List<DailySummary>>() {
            @Override
            public void onResponse(Call<List<DailySummary>> call, Response<List<DailySummary>> response) {
                if (response.isSuccessful() && response.body() != null) {
                    displaySummaries(response.body());
                } else {
                    Toast.makeText(AddSummaryActivity.this, "获取历史记录失败", Toast.LENGTH_SHORT).show();
                }
            }

            @Override
            public void onFailure(Call<List<DailySummary>> call, Throwable t) {
                Toast.makeText(AddSummaryActivity.this, "网络错误: " + t.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });
    }

    private void displaySummaries(List<DailySummary> summaries) {
        summaryListLayout.removeAllViews();

        if (summaries.isEmpty()) {
            TextView emptyView = new TextView(this);
            emptyView.setText("暂无历史记录");
            emptyView.setTextSize(16);
            emptyView.setPadding(0, 32, 0, 0);
            summaryListLayout.addView(emptyView);
            return;
        }

        LayoutInflater inflater = LayoutInflater.from(this);

        for (DailySummary summary : summaries) {
            View summaryView = inflater.inflate(R.layout.item_summary, summaryListLayout, false);

            TextView tvDate = summaryView.findViewById(R.id.tvDate);
            TextView tvBlogUrl = summaryView.findViewById(R.id.tvBlogUrl);

            tvDate.setText(summary.getSummaryDate());
            tvBlogUrl.setText(summary.getBlogUrl());

            // 为每个总结项添加点击事件
            summaryView.setOnClickListener(v -> {
                String url = summary.getBlogUrl();
                // 检查URL格式
                if (!url.startsWith("http://") && !url.startsWith("https://")) {
                    url = "http://" + url;
                }

                // 使用浏览器打开链接
                Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
                startActivity(browserIntent);
            });

            summaryListLayout.addView(summaryView);
        }
    }
}

package com.example.study0327;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.example.study0327.api.ApiService;
import com.example.study0327.api.RetrofitClient;
import com.example.study0327.modules.ProgrammingRecord;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class AddRecordActivity extends AppCompatActivity {
    private EditText etPspStage, etContent, etTimeSpent;
    private Button btnAddRecord;
    private String studentId;
    private String token;

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

        // 获取用户登录信息
        SharedPreferences prefs = getSharedPreferences("user_prefs", MODE_PRIVATE);
        studentId = prefs.getString("student_id", "");
        token = "Bearer " + prefs.getString("auth_token", "").trim();

        if (studentId.isEmpty() || token.equals("Bearer ")) {
            Toast.makeText(this, "请先登录", Toast.LENGTH_SHORT).show();
            finish();
            return;
        }

        etPspStage = findViewById(R.id.etPspStage);
        etContent = findViewById(R.id.etContent);
        etTimeSpent = findViewById(R.id.etTimeSpent);
        btnAddRecord = findViewById(R.id.btnAddRecord);
        // 在onCreate方法中添加
        Button btnViewRecords = findViewById(R.id.btnViewRecords);
        btnViewRecords.setOnClickListener(v -> {
            Intent intent = new Intent(AddRecordActivity.this, ViewRecordsActivity.class);
            startActivity(intent);
        });

        // 获取当前日期
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
        String currentDate = sdf.format(new Date());

        btnAddRecord.setOnClickListener(v -> {
            try {
                String pspStage = etPspStage.getText().toString().trim();
                String content = etContent.getText().toString().trim();
                String timeSpentStr = etTimeSpent.getText().toString().trim();

                if (pspStage.isEmpty()) {
                    Toast.makeText(this, "请输入PSP阶段", Toast.LENGTH_SHORT).show();
                    return;
                }

                ProgrammingRecord record = new ProgrammingRecord();
                record.setUserId(String.valueOf(Long.parseLong(studentId))); // 设置学号为用户ID
                record.setRecordDate(currentDate);
                record.setPspStage(pspStage);
                record.setContent(content);

                if (!timeSpentStr.isEmpty()) {
                    record.setTimeSpent(Integer.parseInt(timeSpentStr));
                }

                ApiService apiService = RetrofitClient.getClient().create(ApiService.class);
                Call<String> call = apiService.addProgrammingRecord(token, record);

                call.enqueue(new Callback<String>() {
                    @Override
                    public void onResponse(Call<String> call, Response<String> response) {
                        if (response.isSuccessful()) {
                            Toast.makeText(AddRecordActivity.this, response.body(), Toast.LENGTH_SHORT).show();
                            finish();
                        } else {
                            Toast.makeText(AddRecordActivity.this, "添加失败: " + response.message(), Toast.LENGTH_SHORT).show();
                        }
                    }

                    @Override
                    public void onFailure(Call<String> call, Throwable t) {
                        Toast.makeText(AddRecordActivity.this, "网络错误: " + t.getMessage(), Toast.LENGTH_SHORT).show();
                    }
                });
            } catch (NumberFormatException e) {
                Toast.makeText(this, "请输入有效的时间", Toast.LENGTH_SHORT).show();
            } catch (Exception e) {
                Toast.makeText(this, "添加失败: " + e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });
    }
}

四、明日计划

学习查看每日总结和打卡记录的功能实现。
研究如何对历史记录进行分页显示。

五、关键收获

进一步掌握了Retrofit在数据提交方面的应用。
了解了数据验证和 URL 格式检查在应用开发中的重要性。