你能给我写一封Android studio的学生信息管理系统吗

当然可以！不过在这里我只能给你提供一些基本的思路和代码示例，具体实现还需要你自己完成。以下是一些关键点：

1. UI设计：你可以使用Android Studio自带的UI设计工具或者自己手动编写XML布局文件来创建你的界面，包括主页面、添加页面、修改页面、删除页面等等。

2. 数据库设计：你需要设计一个数据库来存储学生的信息，包括姓名、学号、性别、年龄、专业等字段。你可以使用SQLite或者其他数据库来实现。

3. 数据库操作：你需要编写一些操作数据库的代码，包括增删改查等操作。以下是一个SQLite的示例：

public void addStudent(Student student) {
    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put(KEY_NAME, student.getName());
    values.put(KEY_ID, student.getId());
    values.put(KEY_GENDER, student.getGender());
    values.put(KEY_AGE, student.getAge());
    values.put(KEY_MAJOR, student.getMajor());

    db.insert(TABLE_STUDENTS, null, values);
    db.close();
}

public Student getStudent(int id) {
    SQLiteDatabase db = this.getReadableDatabase();

    Cursor cursor = db.query(TABLE_STUDENTS, new String[] { KEY_ID,
            KEY_NAME, KEY_GENDER, KEY_AGE, KEY_MAJOR }, KEY_ID + "=?",
            new String[] { String.valueOf(id) }, null, null, null, null);
    if (cursor != null)
        cursor.moveToFirst();

    Student student = new Student(cursor.getString(1), Integer.parseInt(cursor.getString(0)),
            cursor.getString(2), Integer.parseInt(cursor.getString(3)), cursor.getString(4));
    return student;
}

public List<Student> getAllStudents() {
    List<Student> studentList = new ArrayList<Student>();
    String selectQuery = "SELECT  * FROM " + TABLE_STUDENTS;

    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor = db.rawQuery(selectQuery, null);

    if (cursor.moveToFirst()) {
        do {
            Student student = new Student();
            student.setId(Integer.parseInt(cursor.getString(0)));
            student.setName(cursor.getString(1));
            student.setGender(cursor.getString(2));
            student.setAge(Integer.parseInt(cursor.getString(3)));
            student.setMajor(cursor.getString(4));

            studentList.add(student);
        } while (cursor.moveToNext());
    }

    return studentList;
}

public int updateStudent(Student student) {
    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put(KEY_NAME, student.getName());
    values.put(KEY_GENDER, student.getGender());
    values.put(KEY_AGE, student.getAge());
    values.put(KEY_MAJOR, student.getMajor());

    return db.update(TABLE_STUDENTS, values, KEY_ID + " = ?",
            new String[] { String.valueOf(student.getId()) });
}

public void deleteStudent(Student student) {
    SQLiteDatabase db = this.getWritableDatabase();
    db.delete(TABLE_STUDENTS, KEY_ID + " = ?",
            new String[] { String.valueOf(student.getId()) });
    db.close();
}

4. 逻辑实现：你需要编写一些逻辑代码来实现添加、查询、修改和删除学生信息的功能。以下是一个示例：

public class MainActivity extends AppCompatActivity {

    private EditText inputName, inputId, inputGender, inputAge, inputMajor;
    private Button btnAdd, btnDelete, btnUpdate, btnGetAll;
    private ListView listView;

    private DatabaseHandler db;

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

        inputName = (EditText) findViewById(R.id.input_name);
        inputId = (EditText) findViewById(R.id.input_id);
        inputGender = (EditText) findViewById(R.id.input_gender);
        inputAge = (EditText) findViewById(R.id.input_age);
        inputMajor = (EditText) findViewById(R.id.input_major);

        btnAdd = (Button) findViewById(R.id.btn_add);
        btnDelete = (Button) findViewById(R.id.btn_delete);
        btnUpdate = (Button) findViewById(R.id.btn_update);
        btnGetAll = (Button) findViewById(R.id.btn_get_all);

        listView = (ListView) findViewById(R.id.list_view);

        db = new DatabaseHandler(this);

        btnAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String name = inputName.getText().toString();
                int id = Integer.parseInt(inputId.getText().toString());
                String gender = inputGender.getText().toString();
                int age = Integer.parseInt(inputAge.getText().toString());
                String major = inputMajor.getText().toString();

                Student student = new Student(name, id, gender, age, major);

                db.addStudent(student);

                inputName.setText("");
                inputId.setText("");
                inputGender.setText("");
                inputAge.setText("");
                inputMajor.setText("");

                Toast.makeText(MainActivity.this, "Student added", Toast.LENGTH_SHORT).show();
            }
        });

        btnDelete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int id = Integer.parseInt(inputId.getText().toString());

                Student student = db.getStudent(id);

                db.deleteStudent(student);

                inputName.setText("");
                inputId.setText("");
                inputGender.setText("");
                inputAge.setText("");
                inputMajor.setText("");

                Toast.makeText(MainActivity.this, "Student deleted", Toast.LENGTH_SHORT).show();
            }
        });

        btnUpdate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String name = inputName.getText().toString();
                int id = Integer.parseInt(inputId.getText().toString());
                String gender = inputGender.getText().toString();
                int age = Integer.parseInt(inputAge.getText().toString());
                String major = inputMajor.getText().toString();

                Student student = new Student(name, id, gender, age, major);

                db.updateStudent(student);

                inputName.setText("");
                inputId.setText("");
                inputGender.setText("");
                inputAge.setText("");
                inputMajor.setText("");

                Toast.makeText(MainActivity.this, "Student updated", Toast.LENGTH_SHORT).show();
            }
        });

        btnGetAll.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                List<Student> studentList = db.getAllStudents();

                ArrayAdapter<Student> adapter = new ArrayAdapter<Student>(MainActivity.this,
                        android.R.layout.simple_list_item_1, studentList);

                listView.setAdapter(adapter);
            }
        });
    }
}

这些代码示例只是一个简单的学生信息管理系统的骨架，你需要根据自己的需求进行修改和完善。希望这些信息对你有所帮助！