基于android开发简单的“学生信息管理系统”APP+SQLite数据库存储

安卓SQLite数据库+学生信息管理系统的开发步骤

（一）、学生基本信息类的创建

1、在编写java程序代码的位置，创建Student类，用来定义学生的基本信息属性：

package com.cqjtu.studentsystem;
import java.io.Serializable;
import java.util.List;
public class Student  implements Serializable {
    private String name;
    private String id;
    private String major;
    private String age;
    private String sex;
    private String time;
    private List<String> course;
    private String college;
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public Student(String id, String name, String sex, String age, String time, String major, String college, List<String> course) {
        this.id=id;
        this.name=name;
        this.sex=sex;
        this.age=age;
        this.time=time;
        this.major=major;
        this.college=college;
        this.course=course;
    }
    public Student(){
    }
    public List<String> getCourse() {
        return course;
    }
    public void setCourse(List<String> course) {
        this.course = course;
    }
    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }
    public String getTime() {
        return time;
    }
    public void setTime(String time) {
        this.time = time;
    }
    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getCollege() {
        return college;
    }

    public void setCollege(String college) {
        this.college = college;
    }

    public String getName(){
        return name;
    }
    public String getMajor(){
        return major;
    }
    public void setName(String name){
        this.name=name;
    }
    public void setMajor(String major){
        this.major=major;
    }
}

以上的定义包括学号、姓名、性别、年龄、专业、入学时间、学院以及所选择的课程

（二）、SQLite数据库和学生信息表的创建

1、SQLite数据库的创建如下：

在同样编写java代码的位置创建名为MySQLite的类，用来建立数据库和学生信息表：

package com.cqjtu.studentsystem;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.widget.Toast;
import androidx.annotation.Nullable;
public class MySQLite extends SQLiteOpenHelper {
    private static final String TABLE_NAME ="student1" ;
    private Context context;
    public MySQLite(@Nullable Context context,int version) {
        super(context, "student.db", null, version);
        this.context = context;
    }
    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {
        sqLiteDatabase.execSQL("create table student1("+
                "id text," +
                "name text," +
                "age text," +
                "sex text," +
                "time datatype," +
                "major text," +
                "college text," +
                "course text);");
        Toast.makeText(context,"表成功创建",Toast.LENGTH_SHORT).show();
    }
    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
    }
}

学生信息表的属性应该和Student类中的属性一致！

（三）、关于展示学生信息列表listView适配器的自定义函数编写

1、自定义学生信息列表的设计格式

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_vertical">
    <RelativeLayout
        android:layout_width="270dp"
        android:layout_height="wrap_content">
        <ImageView
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:src="@drawable/student1"
            android:layout_weight="1"
            android:id="@+id/student_image"/>
        <TextView
            android:layout_width="80dp"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:layout_weight="1"
            android:layout_toRightOf="@id/student_image"
            android:text="李易峰"
            android:textSize="20sp"
            android:id="@+id/student_name"/>
        <TextView
            android:layout_width="80dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:layout_toRightOf="@id/student_name"
            android:text="性别"
            android:gravity="bottom"
            android:textSize="15sp"
            android:id="@+id/student_sex"/>
        <TextView
            android:layout_width="60dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:layout_toRightOf="@id/student_sex"
            android:text="年龄"
            android:gravity="bottom"
            android:textSize="15sp"
            android:id="@+id/student_age"/>
        <TextView
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:text="专业"
            android:layout_marginLeft="5dp"
            android:layout_toRightOf="@id/student_image"
            android:layout_marginTop="30dp"
            android:id="@+id/student_major"/>
        <TextView
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            android:text="入学时间"
            android:layout_marginLeft="5dp"
            android:layout_toRightOf="@id/student_major"
            android:layout_marginTop="30dp"
            android:id="@+id/student_time"/>
    </RelativeLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <ImageView
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_marginTop="5dp"
            android:src="@drawable/edit"
            android:focusable="false"
            android:id="@+id/student_edit"/>
        <ImageView
            android:layout_width="50dp"
            android:layout_height="40dp"
            android:layout_marginTop="5dp"
            android:layout_marginLeft="39dp"
            android:src="@drawable/delete"
            android:focusable="false"
            android:id="@+id/student_delete"/>
    </RelativeLayout>
</LinearLayout>

下图为设计格式的效果图

2、Listview自定义适配器的编写

在java代码编写的文件下创建一个名为StuAdapter的适配器，用来匹配我们设计的学生信息列表格式

package com.cqjtu.studentsystem;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;
public class StuAdapter extends BaseAdapter implements View.OnClickListener {
    private List <Student>stuDates;
    private Context stuContext;
    private InnerItemOnClickListener myListener;
    public StuAdapter(Context context,List<Student>list){
        this.stuContext=context;
        this.stuDates=list;
    }
    @Override
    public int getCount() {
        return stuDates.size();
    }

    @Override
    public Object getItem(int position) {
        return stuDates.get(position);
    }
    @Override
    public long getItemId(int position) {
        Student student=(Student)stuDates.get(position);
        return position;
    }
    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        View stuView=View.inflate(stuContext,R.layout.myspinner_item,null);
        TextView stuName=stuView.findViewById(R.id.student_name);
        TextView stuSex=stuView.findViewById(R.id.student_sex);
        TextView stuAge=stuView.findViewById(R.id.student_age);
        TextView stuTime=stuView.findViewById(R.id.student_time);
        TextView stuMajor=stuView.findViewById(R.id.student_major);
        ImageView edit=stuView.findViewById(R.id.student_edit);
        ImageView delete=stuView.findViewById(R.id.student_delete);
        Student student=(Student)stuDates.get(i);
        stuName.setText(student.getName());
        stuSex.setText(student.getSex());
        stuAge.setText(student.getAge());
        stuTime.setText(student.getTime());
        stuMajor.setText(student.getMajor());
        edit.setImageResource(R.drawable.edit);
        delete.setImageResource(R.drawable.delete);
        edit.setOnClickListener(this);
        delete.setOnClickListener(this);
        edit.setTag(i);
        delete.setTag(i);
        return stuView;
    }
    interface InnerItemOnClickListener {
        abstract void itemClick(View view);
    }
    public void setOnInnerItemOnClickListener(InnerItemOnClickListener listener){
        this.myListener=listener;
    }
    @Override
    public void onClick(View view) {
        myListener.itemClick(view);
    }
}

（四）、学生基本信息的增、删、改、查

1、增加学生信息

1、增加学生信息的页面如下：

2、增加学生的代码如下所示：

if(view.getId()==R.id.addname){
            String id=id1.getText().toString();
            String name=name1.getText().toString();
            String sex=getRadio(sex1);
            String age=age1.getText().toString();
            String time=time1.getText().toString();
            String major=major1.getText().toString();
            String college=college1.getSelectedItem().toString();
            List<String>course=getCheckValue(course1);
            if (isEmpty(name)) {
                Toast.makeText(MainActivity.this,"姓名不能为空",Toast.LENGTH_SHORT).show();
                return;
            }
            if (isEmpty(age)){
                Toast.makeText(MainActivity.this,"年龄不能为空",Toast.LENGTH_SHORT).show();
                return;
            }
            if (isEmpty(sex)) {
                Toast.makeText(MainActivity.this,"请选择性别",Toast.LENGTH_SHORT).show();
                return;
            }
            if (isEmpty(time)) {
                Toast.makeText(MainActivity.this,"请输入入学年份",Toast.LENGTH_SHORT).show();
                return;
            }
            if (isEmpty(major)) {
                Toast.makeText(MainActivity.this,"专业不能为空",Toast.LENGTH_SHORT).show();
                return;
            }
            if (isEmpty(college)){
                Toast.makeText(MainActivity.this,"学院不能为空",Toast.LENGTH_SHORT).show();
                return;
            }
            if (isEmpty(course)){
                Toast.makeText(MainActivity.this,"请勾选课程",Toast.LENGTH_SHORT).show();
                return;
            }
            Student student=new Student(id,name,sex,age,time,major,college,course);
            students.add(student);
            mySQLite=new MySQLite(this,1);
            db= mySQLite.getWritableDatabase();
            //使用ContentValues添加数据
            ContentValues values=new ContentValues();
            values.put("id",id);
            values.put("name",name);
            values.put("sex",sex);
            values.put("age",age);
            values.put("time",time);
            values.put("major",major);
            values.put("college",college);
            values.put("course",listToString(course));
            db.insert(TABLE_NAME, null, values);
            db.close();
            sent("数据库的学生信息刷新啦！");
            Toast.makeText(this,"已经添加"+students.size()+"条记录",Toast.LENGTH_SHORT).show();
            i=i+1;
            id1.setText("1000"+i);
            name1.setText("");
            sex1.clearCheck();
            age1.setText("");
            time1.setText("");
            major1.setText("");
            showSpanner(college1,"信息科学与工程");
            box1.setChecked(false);
            box2.setChecked(false);
            box3.setChecked(false);
            box4.setChecked(false);
            name1.setFocusable(true);
            name1.setFocusableInTouchMode(true);
            name1.requestFocus();
        }else if(view.getId()==R.id.addmajor){
            intent.setClass(this,display.class);
            intent.putExtra("students",(Serializable)students);
            startActivity(intent);

以上包括添加到lis里面和数据库里面

2、删除学生信息

1、删除学生信息效果图如下：

红色箭头处：
2、删除学生信息的代码如下：

 @Override
    public void itemClick(View view){
        Intent intent=new Intent();
        switch (view.getId()){
            case R.id.student_delete:
                int k=(Integer) view.getTag();
                deleteStudent(k);
                students.remove(k);
                i=i-1;
                id1.setText("1000"+i);
                stuAdapter.notifyDataSetChanged();
                sent("您的数据库删除了一条学生信息哦！");
                Toast.makeText(display.this,"删除成功",Toast.LENGTH_SHORT).show();
                break;
        }
    }

学生信息在数据库中的删除如下：

 public void deleteStudent(int i){
        mySQLite=new MySQLite(this,1);
        db=mySQLite.getWritableDatabase();
        db.delete("student1","id=?",new String[]{students.get(i).getId()});
        db.close();
    }

3、修改学生信息

1、修改学生信息的效果如下：
红色箭头处：

修改学生信息的页面如下所示：

2、修改学生信息的代码如下：

 @Override
    public void onClick(View view) {
        if(view.getId()==R.id.quit){
            finish();
        }else if (view.getId()==R.id.save){
            String id=id22.getText().toString();
            students.get(k()).setId(id);
            String name=name22.getText().toString();
            students.get(k()).setName(name);
            String sex=getRadio(sex22);
            students.get(k()).setSex(sex);
            String age=age22.getText().toString();
            students.get(k()).setAge(age);
            String time=time22.getText().toString();
            students.get(k()).setTime(time);
            String major=major22.getText().toString();
            students.get(k()).setMajor(major);
            String college=college22.getSelectedItem().toString();
            students.get(k()).setCollege(college);
            List<String>course=getCheckValue(course22);
            students.get(k()).setCourse(course);
            mySQLite=new MySQLite(this,1);
            db=mySQLite.getWritableDatabase();
            ContentValues values=new ContentValues();
            values.put("name",name);
            values.put("sex",sex);
            values.put("age",age);
            values.put("time",time);
            values.put("major",major);
            values.put("college",college);
            values.put("course", listToString(course));
            db.update(TABLE_NAME,values,"id=?",new String[]{id});
            sent("数据库的一条学生信息修改成功啦！");
            stuAdapter.notifyDataSetChanged();
            finish();
        }
   }

4、查询学生信息

1、查询学生信息的效果展示：

查询信息的页面展示如下：

2、查询信息java代码如下：
查询所有学生的信息代码如下：

public void searchAll(Student student) {
        MySQLite mySQLite = new MySQLite(this, 1);
        SQLiteDatabase database = mySQLite.getReadableDatabase();
        Cursor cursor = database.rawQuery("select * from student1", null);
        while (cursor.moveToNext()) {
            String id = cursor.getString(cursor.getColumnIndex("id"));
            String name = cursor.getString(cursor.getColumnIndex("name"));
            String age = cursor.getString(cursor.getColumnIndex("age"));
            String sex = cursor.getString(cursor.getColumnIndex("sex"));
            String time = cursor.getString(cursor.getColumnIndex("time"));
            String major = cursor.getString(cursor.getColumnIndex("major"));
            String college = cursor.getString(cursor.getColumnIndex("college"));
            String course = cursor.getString(cursor.getColumnIndex("course"));
            student = new Student(id, name, sex, age, time, major, college, stringToList(course));    //student_info存一个条目的数据
            students.add(student);
            i=students.size();
        }
    }

关键字查询代码如下：

            String key=find1.getText().toString();
            if (isEmpty(key)) {
                Toast.makeText(this,"查找条件不能为空",Toast.LENGTH_SHORT).show();
                return;
            }
            List<Student>find=new ArrayList<Student>();
            mySQLite=new MySQLite(this,1);
            String selectQuery="SELECT * FROM student1 where name like '%"+key+"%' or major like '%"+key+"%' or id like '%"+key+"%' or age like '%"+key+"%' " +
                    "or sex like '%"+key+"%' or time like '%"+key+"%' or college like '%"+key+"%' or course like '%"+key+"%'";
            SQLiteDatabase db=mySQLite.getReadableDatabase();
            Cursor cursor=db.rawQuery(selectQuery,null);
            if(cursor.moveToFirst()){
                do{
                    Student student=new Student();
                    student.setId(cursor.getString(cursor.getColumnIndex("id")));
                    student.setName(cursor.getString(cursor.getColumnIndex("name")));
                    student.setSex(cursor.getString(cursor.getColumnIndex("sex")));
                    student.setAge(cursor.getString(cursor.getColumnIndex("age")));
                    student.setTime(cursor.getString(cursor.getColumnIndex("time")));
                    student.setMajor(cursor.getString(cursor.getColumnIndex("major")));
                    student.setCollege(cursor.getString(cursor.getColumnIndex("college")));
                    student.setCourse(stringToList(cursor.getString(cursor.getColumnIndex("course"))));
                    find.add(student);
                }while(cursor.moveToNext());
            }
            intent.setClass(this,search.class);
            intent.putExtra("find",(Serializable)find);
            startActivity(intent);
        }

（五）、相关自定义函数的讲解

1、判断输入空的函数如下：

判断字符串不能为空如下：

private boolean isEmpty(String str) {
        return str.length()==0||null==str;
    }

判断列表不能为空（课程）如下：

private boolean isEmpty(List<String> str){
        return str.size()==0||null==str;
    }

2、字符串和列表的相互转换函数（用在课程的勾选）

1、字符串转list：

private List<String> stringToList(String course){
        ArrayList<String> course1 = new ArrayList<String>(Arrays.asList(course.split(",")));
        return course1;
    }

2、list转字符串：

 private String listToString(List<String>course){
        String[] course1= new String[course.size()];
        course1 = course.toArray(course1);
        String course2="";
        for (int i=0;i< course1.length;i++){
            course2=course2+","+course1[i];
        }
        return course2;
    }

3、获取RadioGroup的勾选项的值

 public String getRadio(RadioGroup radioGroup){
        String info="";
        int num=radioGroup.getChildCount();
        for(int i=0;i<num;i++){
            RadioButton rd=(RadioButton)radioGroup.getChildAt(i);
            if(rd.isChecked()){
                info=rd.getText().toString();
                break;
            }
        }
        return info;
    }

4、获取CheckBox的勾选中的值

public List<String> getCheckValue(LinearLayout linearLayout) {
        List<String> options = new ArrayList<String>();
        int num = linearLayout.getChildCount();
        for (int i = 0; i < num; i++) {
            CheckBox checkBox = (CheckBox) linearLayout.getChildAt(i);
            if (checkBox.isChecked()) {
                options.add(checkBox.getText().toString());
            }
        }
        return options;
    }

5、获取选中下拉框的值

学院下拉框展示的内容如下：

private void initSpinner(){
        String college[]={"信息科学与工程","人文学院","经济管理学院","外国语学院","土木工程学院"};
        ArrayAdapter<String>arrayAdapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,college);
        college1.setAdapter(arrayAdapter);
    }

获取下拉框的值如下：

public void showSpanner(Spinner spinner,String values){
        SpinnerAdapter adapter=spinner.getAdapter();
        int k=adapter.getCount();
        for(int i=0;i<k;i++){
            if(values.equals(adapter.getItem(i).toString())){
                spinner.setSelection(i,true);
                break;
            }
        }
    }

6、获取选中时间的值

private void getDate(){
        cal=Calendar.getInstance();
        year=cal.get(Calendar.YEAR);
        month=cal.get(Calendar.MONTH);
        day=cal.get(Calendar.DAY_OF_MONTH);
    }

以上就是本次博客学生成绩管理系统的部分内容啦，觉得可以的，可以下载学长上传的资料，里面有整个项目的源代码，保证能够成功运行哦！感谢大家查看、记得留言评论点赞哦！