?歡迎光臨：
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版權(quán)聲明：本文為CSDN博主「學編程的bird」的原創(chuàng)文章，遵循CC 4.0 BY-SA版權(quán)協(xié)議，轉(zhuǎn)載請附上原文出處鏈接及本聲明。
原文鏈接：Android Studio 大作業(yè)--學生信息管理系統(tǒng)-CSDN博客https://blog.csdn.net/m0_64069699/article/details/135324803
內(nèi)容大概：
簡易學生信息管理系統(tǒng)項目需求，大致需要以下Java文件和XML布局文件： Java文件： Student 類（實體類）：用于存儲學生信息。 StudentDBHelper 類（數(shù)據(jù)庫操作類）：繼承自SQLiteOpenHelper，負責創(chuàng)建表、插入、刪除、更新和查詢學生數(shù)據(jù)。 StudentListAdapter 類（RecyclerView Adapter）：適配器類，用于在“學生列表”模塊展示學生數(shù)據(jù)。 StudentListFragment 類（Fragment）：實現(xiàn)學生列表界面功能，包含RecyclerView及其Adapter的初始化等。 AddStudentFragment 類（Fragment）：實現(xiàn)添加學生界面功能，包含EditText輸入框、Button提交按鈕、ImageView頭像選擇等。 SearchStudentFragment 類（Fragment）：實現(xiàn)查詢學生界面功能，包含EditText輸入框、CheckBox或RadioButton查詢條件選擇、查詢結(jié)果展示列表的初始化等。 SearchStudentListAdapter 類（RecyclerView Adapter）：適配器類，用于在“搜索”模塊展示學生數(shù)據(jù)。 MainActivity:用于初始化底部導航欄與ViewPager2，并管理各個Fragment。 XML布局文件： activity_main.xml：主Activity布局文件，包含ViewPager2和TabLayout等控件。 fragment_student_list.xml：學生列表Fragment的布局文件，包含RecyclerView等控件。 fragment_add_student.xml：添加學生Fragment的布局文件，包含姓名、學號、專業(yè)等EditText輸入框以及上傳或選擇圖片的ImageView和提交按鈕等控件。 item_student1.xml：RecyclerView中單個學生項的布局文件，包含顯示學生信息的各種TextView、ImageView等控件。 fragment_search_student.xml：查詢學生Fragment的布局文件，包含查詢輸入框、查詢條件選擇控件以及查詢結(jié)果展示的ListView或RecyclerView控件。 item_student2.xml：RecyclerView中單個學生項的布局文件，包含顯示學生信息的各種TextView、ImageView等控件。 dialog_delete_confirm.xml：刪除確認AlertDialog或PopupWindow的布局文件，包含提示文字和確認/取消按鈕。 bottom_navigation_menu.xml:底部導航欄。
?使用的控件：
此APP中包含以下控件： Button、TextView、EditText、ImageView、Toast、Activity 跳轉(zhuǎn)和傳值、ViewPager2+Fragment 底部導航 PopupWindow & AlertDialog、數(shù)據(jù)庫 RadioButton、CheckBox、返回值、RecyclerView
整體架構(gòu)：
?示例展示:
學生列表
?添加
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?搜索
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源代碼：?
JAVA代碼
MainActivity
package com.example.myfinalwork;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.viewpager2.widget.ViewPager2;
import androidx.viewpager2.adapter.FragmentStateAdapter;
import androidx.appcompat.widget.Toolbar;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.Menu;
import android.widget.Toast;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.example.myfinalwork.StudentListRefreshListener;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements StudentListRefreshListener {
private ViewPager2 viewPager;
private BottomNavigationView bottomNavigationView;
private List<Fragment> fragmentsList;
private MenuItem lastSelectedMenuItem;
private StudentListFragment studentListFragment; // 新增變量
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 初始化ViewPager2和BottomNavigationView
viewPager = findViewById(R.id.view_pager);
setupViewPager();
// 在這里找到并保存StudentListFragment的引用
for (Fragment fragment : fragmentsList) {
if (fragment instanceof StudentListFragment) {
studentListFragment = (StudentListFragment) fragment;
break;
}
}
bottomNavigationView = findViewById(R.id.bottom_navigation_view);
bottomNavigationView.setOnNavigationItemSelectedListener(navigationItemSelectedListener());
bottomNavigationView.setSelectedItemId(R.id.action_student_list);
}
@Override
public void onStudentListRefresh() {
if (studentListFragment != null) {
studentListFragment.refreshStudentList();
}
}
private BottomNavigationView.OnNavigationItemSelectedListener navigationItemSelectedListener() {
return new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
if (item.getItemId() == R.id.action_student_list) {
viewPager.setCurrentItem(0);
} else if (item.getItemId() == R.id.action_add_student) {
viewPager.setCurrentItem(1);
} else if (item.getItemId() == R.id.action_search_student) {
viewPager.setCurrentItem(2);
}
lastSelectedMenuItem = item;
return true;
}
};
}
private void setupViewPager() {
fragmentsList = new ArrayList<>();
studentListFragment = new StudentListFragment(); // 修改：直接使用類級別的變量
AddStudentFragment addStudentFragment = new AddStudentFragment();
SearchStudentFragment searchStudentFragment = new SearchStudentFragment();
// 為AddStudentFragment設置一個接口回調(diào)以通知MainActivity刷新列表
addStudentFragment.setStudentListRefreshListener(this);
fragmentsList.add(studentListFragment);
fragmentsList.add(addStudentFragment);
fragmentsList.add(searchStudentFragment);
viewPager.setAdapter(new FragmentStateAdapter(this) {
@NonNull
@Override
public Fragment createFragment(int position) {
return fragmentsList.get(position);
}
@Override
public int getItemCount() {
return fragmentsList.size();
}
});
viewPager.setUserInputEnabled(false); // 可選：禁用手動滑動切換頁面
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.bottom_navigation_menu, menu);
return true;
}
}
?Student類
package com.example.myfinalwork;
public class Student {
private String id;
private String name;
private String major;
private boolean selected; // 添加一個布爾變量來表示學生是否被選中
public Student(String id, String name, String major) {
this.id = id;
this.name = name;
this.major = major;
this.selected = false; // 初始化時默認未選中
}
public Student() {
}
// Getters and Setters
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getMajor() {
return major;
}
public void setMajor(String major) {
this.major = major;
}
// 新增isSelected()和setSelected()方法
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
@Override
public String toString() {
return "Student{" +
"id='" + id + '\'' +
", name='" + name + '\'' +
", major='" + major + '\'' +
", selected=" + selected +
'}';
}
}
?StudentDBHelper類
package com.example.myfinalwork;
import android.annotation.SuppressLint;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import java.util.ArrayList;
import java.util.List;
public class StudentDBHelper extends SQLiteOpenHelper {
// 數(shù)據(jù)庫名稱
private static final String DATABASE_NAME = "StudentManager.db";
// 數(shù)據(jù)庫版本號，每次更新數(shù)據(jù)庫結(jié)構(gòu)時需要增加
private static final int DATABASE_VERSION = 1;
// 學生信息表名
public static final String TABLE_NAME_STUDENTS = "students";
// 表列名定義
public static final String COLUMN_ID = "id";
public static final String COLUMN_NAME = "name";
public static final String COLUMN_MAJOR = "major";
// 創(chuàng)建學生信息表的SQL語句
private static final String CREATE_TABLE_STUDENTS = "CREATE TABLE " + TABLE_NAME_STUDENTS +
"(" +
COLUMN_ID + " TEXT PRIMARY KEY," +
COLUMN_NAME + " TEXT NOT NULL," +
COLUMN_MAJOR + " TEXT NOT NULL" +
")";
public StudentDBHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_TABLE_STUDENTS);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// 在數(shù)據(jù)庫版本升級時，可以在此處添加數(shù)據(jù)遷移邏輯或者刪除舊表重建新表
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME_STUDENTS);
onCreate(db);
}
/**
* 一個簡單的方法用于將學生信息插入數(shù)據(jù)庫，具體實現(xiàn)由StudentDBHelper提供
* @param student 要插入的學生對象
*/
public void insertStudent(Student student) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(COLUMN_ID, student.getId());
values.put(COLUMN_NAME, student.getName());
values.put(COLUMN_MAJOR, student.getMajor());
db.insert(TABLE_NAME_STUDENTS, null, values);
db.close(); // 關閉數(shù)據(jù)庫連接
}
/**
* 根據(jù)查詢條件搜索學生
* @param query 搜索關鍵詞
* @param searchBy 搜索依據(jù)字段（"name" 或 "id" 或 "major"）
* @return 匹配到的學生列表
*/
public List<Student> searchStudents(String query, String searchBy) {
List<Student> studentList = new ArrayList<>();
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor;
if (searchBy.equals("name")) {
cursor = db.rawQuery("SELECT * FROM " + TABLE_NAME_STUDENTS +
" WHERE " + COLUMN_NAME + " LIKE ?", new String[]{"%" + query + "%"});
} else if (searchBy.equals("id")) {
cursor = db.rawQuery("SELECT * FROM " + TABLE_NAME_STUDENTS +
" WHERE " + COLUMN_ID + " LIKE ?", new String[]{"%" + query + "%"});
} else if (searchBy.equals("major")) {
cursor = db.rawQuery("SELECT * FROM " + TABLE_NAME_STUDENTS +
" WHERE " + COLUMN_MAJOR + " LIKE ?", new String[]{"%" + query + "%"});
} else {
throw new IllegalArgumentException("Invalid searchBy field");
}
if (cursor.moveToFirst()) {
do {
Student student = new Student();
int idColumnIndex = cursor.getColumnIndex(COLUMN_ID);
int nameColumnIndex = cursor.getColumnIndex(COLUMN_NAME);
int majorColumnIndex = cursor.getColumnIndex(COLUMN_MAJOR);
if (idColumnIndex >= 0) {
student.setId(cursor.getString(idColumnIndex));
}
if (nameColumnIndex >= 0) {
student.setName(cursor.getString(nameColumnIndex));
}
if (majorColumnIndex >= 0) {
student.setMajor(cursor.getString(majorColumnIndex));
}
// 只有當所有必要的字段都獲取成功時才添加到列表
if (student.getId() != null && student.getName() != null && student.getMajor() != null) {
studentList.add(student);
}
} while (cursor.moveToNext());
}
cursor.close();
db.close();
return studentList;
}
/**
* 獲取所有學生信息
* @return 所有的學生列表
*/
@SuppressLint("Range")
public List<Student> getAllStudents() {
List<Student> studentList = new ArrayList<>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_NAME_STUDENTS, null, null, null, null, null, null);
if (cursor.moveToFirst()) {
do {
Student student = new Student();
student.setId(cursor.getString(cursor.getColumnIndex(COLUMN_ID)));
student.setName(cursor.getString(cursor.getColumnIndex(COLUMN_NAME)));
student.setMajor(cursor.getString(cursor.getColumnIndex(COLUMN_MAJOR)));
studentList.add(student);
} while (cursor.moveToNext());
}
cursor.close();
db.close();
return studentList;
}
/**
* 根據(jù)學生ID從數(shù)據(jù)庫中刪除學生信息
* @param studentId 要刪除的學生的ID
*/
public void deleteStudent(String studentId) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_NAME_STUDENTS, COLUMN_ID + "=?", new String[]{studentId});
db.close(); // 關閉數(shù)據(jù)庫連接
}
}
SearchStudentFragment類
package com.example.myfinalwork;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public class SearchStudentFragment extends Fragment {
private EditText editTextSearchQuery;
private RadioButton radioButtonByName, radioButtonById,radioButtonByMajor;
private RecyclerView recyclerViewSearchResults;
private SearchListAdapter searchResultsAdapter;
private List<Student> searchedStudents;
private StudentDBHelper dbHelper;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_search_student, container, false);
// 初始化控件引用
editTextSearchQuery = rootView.findViewById(R.id.edit_text_search_query);
radioButtonByName = rootView.findViewById(R.id.radio_button_name);
radioButtonById = rootView.findViewById(R.id.radio_button_id);
radioButtonByMajor = rootView.findViewById(R.id.radio_button_major);
recyclerViewSearchResults = rootView.findViewById(R.id.recycler_view_search_results);
recyclerViewSearchResults.setLayoutManager(new LinearLayoutManager(requireContext()));
// 初始化數(shù)據(jù)庫幫助類
dbHelper = new StudentDBHelper(getActivity().getApplicationContext());
// 初始化搜索結(jié)果列表的適配器
searchedStudents = new ArrayList<>();
searchResultsAdapter = new SearchListAdapter(requireContext(), searchedStudents);
recyclerViewSearchResults.setAdapter(searchResultsAdapter);
// 添加搜索按鈕點擊事件監(jiān)聽器
Button buttonSearch = rootView.findViewById(R.id.button_search);
buttonSearch.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String query = editTextSearchQuery.getText().toString().trim();
String searchBy;
if (radioButtonByName.isChecked()) {
searchBy = "name";
} else if (radioButtonById.isChecked()) {
searchBy = "id";
} else if (radioButtonByMajor.isChecked()) { // 新增部分
searchBy = "major";
} else {
searchBy = "name"; // 默認值，如果都沒有選中則按照姓名搜索
}
if (!query.isEmpty()) {
searchedStudents.clear();
List<Student> students = dbHelper.searchStudents(query, searchBy);
searchedStudents.addAll(students);
searchResultsAdapter.notifyDataSetChanged();
if (searchedStudents.isEmpty()) {
Toast.makeText(getContext(), "未找到匹配的學生", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getContext(), "請輸入搜索關鍵詞", Toast.LENGTH_SHORT).show();
}
}
});
return rootView;
}
}
?SearchListAdapter類
package com.example.myfinalwork;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class SearchListAdapter extends RecyclerView.Adapter<SearchListAdapter.StudentViewHolder> {
private Context context;
private List<Student> studentList;
public SearchListAdapter(Context context, List<Student> studentList) {
this.context = context;
this.studentList = studentList;
}
@NonNull
@Override
public StudentViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(context).inflate(R.layout.item_student2, parent, false);
return new StudentViewHolder(itemView);
}
@Override
public void onBindViewHolder(@NonNull StudentViewHolder holder, int position) {
final Student currentStudent = studentList.get(position);
holder.studentName.setText(currentStudent.getName());
holder.studentId.setText(currentStudent.getId());
holder.studentMajor.setText(currentStudent.getMajor());
}
@Override
public int getItemCount() {
return studentList.size();
}
// ViewHolder 類用于緩存視圖組件
public static class StudentViewHolder extends RecyclerView.ViewHolder {
TextView studentName, studentId, studentMajor;
CheckBox checkBoxSelect;
public StudentViewHolder(@NonNull View itemView) {
super(itemView);
studentName = itemView.findViewById(R.id.text_view_student_name);
studentId = itemView.findViewById(R.id.text_view_student_id);
studentMajor = itemView.findViewById(R.id.text_view_student_major);
checkBoxSelect = itemView.findViewById(R.id.check_box_select);
}
}
}
?StudentListFragment類
package com.example.myfinalwork;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public class StudentListFragment extends Fragment implements StudentListAdapter.OnItemSelectedListener {
private RecyclerView recyclerView;
private StudentListAdapter adapter;
private List<Student> studentList;
private Button deleteButton;
private List<Student> selectedStudents = new ArrayList<>();
private StudentDBHelper dbHelper;
private AlertDialog deleteConfirmationDialog;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// 加載fragment布局
View rootView = inflater.inflate(R.layout.fragment_student_list, container, false);
// 初始化數(shù)據(jù)庫助手
dbHelper = new StudentDBHelper(requireContext());
// 初始化RecyclerView和Adapter
recyclerView = rootView.findViewById(R.id.recycler_view_students);
recyclerView.setLayoutManager(new LinearLayoutManager(requireContext()));
// 這里可以填充或從數(shù)據(jù)庫加載學生數(shù)據(jù)
// 初始化數(shù)據(jù)列表
studentList = new ArrayList<>();
studentList = dbHelper.getAllStudents();
// 創(chuàng)建并設置Adapter
adapter = new StudentListAdapter(requireContext(), studentList);
adapter.setOnItemSelectedListener(this); // 設置選擇監(jiān)聽器
recyclerView.setAdapter(adapter);
// 獲取并設置刪除按鈕點擊事件
deleteButton = rootView.findViewById(R.id.button_delete);
deleteButton.setOnClickListener(v -> showDeleteConfirmationDialog());
// 獲取并設置刷新按鈕點擊事件
Button refreshButton = rootView.findViewById(R.id.button_refresh);
refreshButton.setOnClickListener(v -> {
refreshStudentList();
Toast.makeText(requireContext(), "學生列表已刷新", Toast.LENGTH_SHORT).show();
});
return rootView;
}
// 顯示刪除確認對話框
private void showDeleteConfirmationDialog() {
if (!selectedStudents.isEmpty()) {
AlertDialog.Builder builder = new AlertDialog.Builder(requireContext());
View dialogView = LayoutInflater.from(requireContext()).inflate(R.layout.dialog_delete_confirm, null);
Button btnCancel = dialogView.findViewById(R.id.button_cancel);
Button btnDelete = dialogView.findViewById(R.id.button_delete);
btnCancel.setOnClickListener(v -> deleteConfirmationDialog.dismiss());
btnDelete.setOnClickListener(v -> {
for (Student student : selectedStudents) {
dbHelper.deleteStudent(student.getId()); // 從數(shù)據(jù)庫中刪除學生
studentList.remove(student); // 從列表中移除學生
}
selectedStudents.clear(); // 清空已刪除的學生列表
adapter.notifyDataSetChanged(); // 刷新RecyclerView
deleteConfirmationDialog.dismiss();
Toast.makeText(requireContext(), "刪除成功", Toast.LENGTH_SHORT).show();
});
deleteConfirmationDialog = builder.setView(dialogView)
.setTitle("刪除確認")
.create();
deleteConfirmationDialog.show();
} else {
Toast.makeText(requireContext(), "請先選擇要刪除的學生", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onItemSelected(Student student, boolean selected) {
if (selected) {
selectedStudents.add(student);
} else {
selectedStudents.remove(student);
}
}
public void refreshStudentList() {
// 從數(shù)據(jù)庫重新獲取學生數(shù)據(jù)
studentList.clear(); // 清空現(xiàn)有數(shù)據(jù)
studentList.addAll(dbHelper.getAllStudents()); // 將新數(shù)據(jù)添加到studentList
adapter.notifyDataSetChanged(); // 刷新RecyclerView的數(shù)據(jù)
}
}
StudentListAdapter類
package com.example.myfinalwork;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class StudentListAdapter extends RecyclerView.Adapter<StudentListAdapter.StudentViewHolder> {
private Context context;
private List<Student> studentList;
private OnItemSelectedListener listener;
public StudentListAdapter(Context context, List<Student> studentList) {
this.context = context;
this.studentList = studentList;
}
// 添加一個接口，用于監(jiān)聽選擇事件
public interface OnItemSelectedListener {
void onItemSelected(Student student, boolean selected);
}
public void setOnItemSelectedListener(OnItemSelectedListener listener) {
this.listener = listener;
}
@NonNull
@Override
public StudentViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(context).inflate(R.layout.item_student1, parent, false);
return new StudentViewHolder(itemView);
}
@Override
public void onBindViewHolder(@NonNull StudentViewHolder holder, int position) {
final Student currentStudent = studentList.get(position);
holder.studentName.setText(currentStudent.getName());
holder.studentId.setText(currentStudent.getId());
holder.studentMajor.setText(currentStudent.getMajor());
holder.checkBoxSelect.setChecked(currentStudent.isSelected());
holder.checkBoxSelect.setOnCheckedChangeListener((buttonView, isChecked) -> {
if (listener != null) {
currentStudent.setSelected(isChecked);
listener.onItemSelected(currentStudent, isChecked);
}
});
}
@Override
public int getItemCount() {
return studentList.size();
}
// ViewHolder 類用于緩存視圖組件
public static class StudentViewHolder extends RecyclerView.ViewHolder {
TextView studentName, studentId, studentMajor;
CheckBox checkBoxSelect;
public StudentViewHolder(@NonNull View itemView) {
super(itemView);
studentName = itemView.findViewById(R.id.text_view_student_name);
studentId = itemView.findViewById(R.id.text_view_student_id);
studentMajor = itemView.findViewById(R.id.text_view_student_major);
checkBoxSelect = itemView.findViewById(R.id.check_box_select);
}
}
}
AddStudentFragment類
package com.example.myfinalwork;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import java.util.List;
public class AddStudentFragment extends Fragment {
private EditText editTextName, editTextId, editTextMajor;
private Button buttonSubmit;
private StudentDBHelper dbHelper;
private StudentListRefreshListener refreshListener; // 移除MainActivity前綴，因為它是一個接口引用
public void setStudentListRefreshListener(StudentListRefreshListener listener) {
this.refreshListener = listener;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_add_student, container, false);
// 初始化控件引用
editTextName = rootView.findViewById(R.id.edit_text_name);
editTextId = rootView.findViewById(R.id.edit_text_student_id);
editTextMajor = rootView.findViewById(R.id.edit_text_major);
buttonSubmit = rootView.findViewById(R.id.button_submit);
// 初始化數(shù)據(jù)庫幫助類
dbHelper = new StudentDBHelper(getActivity().getApplicationContext());
// 獲取宿主Activity的引用并設置監(jiān)聽器（已在setupViewPager()中完成）
// 添加提交按鈕點擊事件監(jiān)聽器
buttonSubmit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String name = editTextName.getText().toString().trim();
String id = editTextId.getText().toString().trim();
String major = editTextMajor.getText().toString().trim();
if (!name.isEmpty() && !id.isEmpty() && !major.isEmpty()) {
Student newStudent = new Student(id, name, major);
dbHelper.insertStudent(newStudent);
editTextName.setText("");
editTextId.setText("");
editTextMajor.setText("");
Toast.makeText(getContext(), "學生信息已添加", Toast.LENGTH_SHORT).show();
// 添加完學生后，通知宿主Activity刷新學生列表
if (refreshListener != null) {
refreshListener.onStudentListRefresh();
}
} else {
Toast.makeText(getContext(), "請確保所有字段都已填寫", Toast.LENGTH_SHORT).show();
}
}
});
return rootView;
}
}
?StudentListRefreshListener接口
package com.example.myfinalwork;
public interface StudentListRefreshListener {
void onStudentListRefresh();
}
XML布局文件?
activity_main.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">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/bottom_navigation_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="@menu/bottom_navigation_menu" />
<androidx.viewpager2.widget.ViewPager2
android:id="@+id/view_pager"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="@+id/bottom_navigation_view"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
dialog_delete_confirm.xml?
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="24dp"
android:background="@color/white">
<!-- 提示信息 -->
<TextView
android:id="@+id/text_view_dialog_message"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textStyle="bold"
android:textColor="@color/black"
android:text="確定要刪除嗎？" />
<!-- 水平分割線 -->
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@color/black" />
<!-- 確認和取消按鈕 -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="end"
android:paddingTop="16dp">
<Button
android:id="@+id/button_cancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="取消"
android:textStyle="bold"
android:textColor="@color/black"
android:background="?attr/selectableItemBackgroundBorderless"
android:minWidth="96dp" />
<Button
android:id="@+id/button_delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="確定"
android:textStyle="bold"
android:textColor="@color/black"
android:background="?attr/selectableItemBackgroundBorderless"
android:minWidth="96dp"
android:layout_marginStart="16dp" />
</LinearLayout>
</LinearLayout>
?fragment_add_student.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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp">
<!-- 姓名輸入框 -->
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/th"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toTopOf="@id/edit_text_name" />
<!-- 姓名輸入框 -->
<EditText
android:id="@+id/edit_text_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="姓名"
android:inputType="textPersonName"
app:layout_constraintTop_toBottomOf="@id/imageView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:layout_marginTop="32dp" />
<!-- 學號輸入框 -->
<EditText
android:id="@+id/edit_text_student_id"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="學號"
android:inputType="number"
app:layout_constraintTop_toBottomOf="@id/edit_text_name"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:layout_marginTop="16dp" />
<!-- 專業(yè)輸入框 -->
<EditText
android:id="@+id/edit_text_major"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="專業(yè)"
android:inputType="text"
app:layout_constraintTop_toBottomOf="@id/edit_text_student_id"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:layout_marginTop="16dp" />
<!-- 提交按鈕 -->
<Button
android:id="@+id/button_submit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="68dp"
android:text="確定"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/edit_text_major" />
</androidx.constraintlayout.widget.ConstraintLayout>
?fragment_search_student.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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp">
<!-- 搜索欄 -->
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/text_input_layout_search"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<com.google.android.material.textfield.TextInputEditText
android:id="@+id/edit_text_search_query"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="搜索姓名或?qū)W號"
android:inputType="text|textCapWords|textMultiLine|textAutoComplete|textAutoCorrect"/>
</com.google.android.material.textfield.TextInputLayout>
<!-- 查詢條件選擇 -->
<RadioGroup
android:id="@+id/radio_group_search_by"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:checkedButton="@+id/radio_button_name"
android:orientation="horizontal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/text_input_layout_search">
<RadioButton
android:id="@+id/radio_button_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="按姓名搜索" />
<RadioButton
android:id="@+id/radio_button_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="按學號搜索" />
<RadioButton
android:id="@+id/radio_button_major"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="按專業(yè)搜索" />
</RadioGroup>
<!-- 搜索結(jié)果列表 -->
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_view_search_results"
android:layout_width="0dp"
android:layout_height="0dp"
android:scrollbars="vertical"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintBottom_toTopOf="@+id/button_search_container"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/radio_group_search_by" />
<!-- 搜索按鈕容器，用于將兩個按鈕保持在同一行且居中 -->
<LinearLayout
android:id="@+id/button_search_container"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<!-- 搜索按鈕 -->
<Button
android:id="@+id/button_search"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="搜索"
android:layout_marginEnd="8dp" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
?fragment_student_list.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">
<com.google.android.material.appbar.MaterialToolbar
android:id="@+id/toolbar"
android:layout_width="0dp"
android:layout_height="?attr/actionBarSize"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:title="學生信息管理"
app:titleCentered="true"/>
<!-- 分割線 -->
<View
android:id="@+id/view_separator"
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/black"
app:layout_constraintBottom_toTopOf="@+id/recycler_view_students"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/toolbar" />
<!-- RecyclerView -->
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_view_students"
android:layout_width="0dp"
android:layout_height="0dp"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintBottom_toTopOf="@+id/button_container"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view_separator" />
<!-- 按鈕容器，用于包含“刪除”和“刷新”按鈕 -->
<LinearLayout
android:id="@+id/button_container"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<!-- 刪除按鈕 -->
<Button
android:id="@+id/button_delete"
android:layout_width="0dp"
android:layout_height="46dp"
android:layout_weight="1"
android:text="刪除"
android:textAllCaps="false"
android:textColor="@android:color/white"
android:layout_marginEnd="8dp" />
<!-- 刷新按鈕 -->
<Button
android:id="@+id/button_refresh"
android:layout_width="0dp"
android:layout_height="46dp"
android:layout_weight="1"
android:text="刷新"
android:textAllCaps="false"
android:textColor="@android:color/white" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
item_student1.xml
<!-- item_student.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="16dp">
<!-- 學生姓名 -->
<TextView
android:id="@+id/text_view_student_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="16sp" />
<!-- 學生學號 -->
<TextView
android:id="@+id/text_view_student_id"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="14sp"
android:layout_marginStart="16dp" />
<!-- 學生專業(yè) -->
<TextView
android:id="@+id/text_view_student_major"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="14sp"
android:layout_marginStart="16dp" />
<!-- 選中框 -->
<CheckBox
android:id="@+id/check_box_select"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:checked="false"
android:layout_marginStart="16dp" />
</LinearLayout>
?item_student2.xml
<!-- item_student.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="16dp">
<!-- 學生姓名 -->
<TextView
android:id="@+id/text_view_student_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="16sp" />
<!-- 學生學號 -->
<TextView
android:id="@+id/text_view_student_id"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="14sp"
android:layout_marginStart="16dp" />
<!-- 學生專業(yè) -->
<TextView
android:id="@+id/text_view_student_major"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="14sp"
android:layout_marginStart="16dp" />
<!-- 選中框 -->
</LinearLayout>
?bottom_navigation_menu.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="@id/action_student_list"
android:icon="@android:drawable/ic_dialog_dialer"
android:title="學生列表" />
<item
android:id="@id/action_add_student"
android:icon="@android:drawable/ic_input_add"
android:title="添加" />
<item
android:id="@id/action_search_student"
android:icon="@android:drawable/ic_menu_search"
android:title="搜索" />
</menu>
到了這里，關于Android Studio 大作業(yè)--學生信息管理系統(tǒng)的文章就介紹完了。如果您還想了解更多內(nèi)容，請在右上角搜索TOY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關文章，希望大家以后多多支持TOY模板網(wǎng)！
