学生类

package com.example.test;import android.widget.RadioButton;import java.io.Serializable;/** * Created by TBM on 2021/3/14 */public class Student implements Serializable {
       private String name;    private String age;    private String major;    private String sex;    private String xy;    private String time;    private String[] course;    Student(String name, String age,String sex,String major,String xy,String time,String[] course){
           this.name = name;        this.major =major;        this.age = age;        this.sex = sex;        this.xy = xy;        this.time = time;        this.course = course;    }    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;}    public String getAge(){
   return age;}    public void setAge(String age){
   this.age = age;}    public String getSex(){
   return sex;}    public void setSex(String sex){
   this.sex = sex;}    public String getXy(){
   return xy;}    public void setXy(String xy){
   this.xy = xy;}    public String getTime() {
           return time;    }    public String[] getCourse() {
           return course;    }    public void setCourse(String[] course) {
           this.course = course;    }}

使用ListView显示学生信息

主界面布局.xml

学生信息显示ListView格式.xml文件

学生信息显示.xml

Adapter连接LIstView

package com.example.test;import android.app.Activity;import android.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.os.Parcelable;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;import java.util.List;/** * Created by TBM on 2021/3/14 */public class StuAdapter extends BaseAdapter implements View.OnClickListener {
       private List stuDates;    private Context stuContext;    StuAdapter(Context context,List datas){
           this.stuContext=context;        this.stuDates=datas;    }    @Override    public int getCount() {
           return stuDates.size();    }    @Override    public Object getItem(int position) {
           return stuDates.get(position);    }    @Override    public long getItemId(int position) {
           return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {
           View stuView = View.inflate(stuContext,R.layout.stu_layout,null);        TextView tv_name = stuView.findViewById(R.id.name);        TextView tv_major = stuView.findViewById(R.id.major);        ImageView iv_edit = stuView.findViewById(R.id.edit);        ImageView iv_delete = stuView.findViewById(R.id.delete);        Student s= (Student) getItem(position);        tv_name.setText(s.getName());        tv_major.setText(s.getMajor());        // 给adpter内部的控件增加一个监听        iv_edit.setOnClickListener(this);        iv_delete.setOnClickListener(this);        //给删除和编辑的imageView设置一个标志，用item的位置position来定位，类似一个id,通过tag可以获得        //list的item        iv_delete.setTag(position);        iv_edit.setTag(position);        return stuView;    }    @Override    public void onClick(View v) {
           final int position= (int) v.getTag();        Student s= (Student) stuDates.get(position);        switch (v.getId()){
               case R.id.edit:                Intent intent=new Intent();                intent.setClass(stuContext,StuInfoActivity.class);                intent.putExtra("student", s);                intent.putExtra("position",position);                intent.putExtra("type","editOper");                ((Activity)stuContext).startActivityForResult(intent,MainActivity.EDITCODE);                /*((Activity)stuContext).setResult(MainActivity.EDITCODE,intent);*/                Toast.makeText(stuContext,s.getName()+":编辑"+position,Toast.LENGTH_LONG).show();                break;            case R.id.delete:                AlertDialog.Builder myDialog=new AlertDialog.Builder(stuContext);                myDialog.setTitle("提示");                myDialog.setIcon(R.mipmap.ic_launcher);                myDialog.setMessage("确定删除"+s.getName()+"?");                myDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                       @Override                    public void onClick(DialogInterface dialog, int which) {
                           stuDates.remove(position);//删除集合                        StuAdapter.this.notifyDataSetChanged();//适配器更新数据                        Toast.makeText(stuContext,s.getName()+":删除！",Toast.LENGTH_LONG).show();                    }                });                myDialog.setNegativeButton("取消",null);                myDialog.show();                break;        }    }}

主界面.java

package com.example.test;import androidx.appcompat.app.AppCompatActivity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.ListView;import android.widget.Toast;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {
       private ListView studentList;    private List
   
     students = new ArrayList<>();    private Button add;    private StuAdapter stuAdapter;    static int ADDCODE=100;    static int EDITCODE=200;    private String c[] = {
   };    @Override    protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        studentList = (ListView) findViewById(R.id.studentList);        add = findViewById(R.id.btn_add);        Student s1 = new Student("李四","21","男","电子信息","信息科学与工程学院","2018-9-1",c);        Student s2 = new Student("王五", "24","男","物联网工程","土木学院","2017-9-1",c);        Student s3 = new Student("张三", "23","女","计算机科学与技术","河海学院","2016-9-1",c);        students.add(s1);        students.add(s2);        students.add(s3);        stuAdapter =new StuAdapter(MainActivity.this,students);        studentList.setAdapter(stuAdapter);        studentList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
               @Override            public void onItemClick(AdapterView
     parent, View view, int position, long id) {
                   ListView listView = (ListView) parent;                Student s = (Student) listView.getItemAtPosition(position);                Toast.makeText(MainActivity.this, s.getName() + "查看", Toast.LENGTH_SHORT).show();            }        });        add.setOnClickListener(new View.OnClickListener() {
               @Override            public void onClick(View v) {
                   Intent intent = new Intent();                intent.setClass(MainActivity.this, StuInfoActivity.class);          /*      intent.putExtra("type", "add");*/                startActivityForResult(intent, ADDCODE);            }        });    }    @Override//设置监听    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
           super.onActivityResult(requestCode, resultCode, data);        if (data == null) return;        Bundle bundle = data.getExtras();        Student student = (Student) bundle.get("students");        /*ArrayList
    
      s = (ArrayList
     
      ) bundle.get("students");        String n = null,m = null;        for (Student student:s){            n = student.getName();            m = student.getMajor();        }        Student student = new Student(n,m);*/        if (requestCode == ADDCODE) {
               students.add(student);            stuAdapter.notifyDataSetChanged();        } else if (requestCode== EDITCODE) {
               int k = bundle.getInt("position");            students.set(k, student);            stuAdapter.notifyDataSetChanged();        }    }}

学生信息类.java

package com.example.test;import androidx.appcompat.app.AppCompatActivity;import android.app.DatePickerDialog;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;import android.widget.Button;import android.widget.CheckBox;import android.widget.DatePicker;import android.widget.EditText;import android.widget.LinearLayout;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.Spinner;import android.widget.Toast;import java.util.ArrayList;import java.util.Calendar;import java.util.List;public class StuInfoActivity extends AppCompatActivity {
       private AutoCompleteTextView major;    private Spinner spinner;    private EditText time;    private Calendar cal;    private int year,month,day;    private Button submit;    private EditText ed_name;    private EditText ed_age;    private RadioGroup sexselect;    private RadioButton manRb;    private RadioButton womanRb;    private LinearLayout linearLayout;    private List
   
     majors = new ArrayList
    
     ();    private ArrayAdapter
     
       adapter;    private ArrayList
      
        students1 = new ArrayList<>();    private String majordata;    private String sexdate;    private String xy;    private String course[];    private int position;    private int xyposition;    private int i;    @Override    protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);        setContentView(R.layout.activity_stu_info);        major = findViewById(R.id.ed_major);        time = findViewById(R.id.datetime);        submit = findViewById(R.id.submit);        sexselect = findViewById(R.id.sexselect);        manRb = findViewById(R.id.manRb);        womanRb = findViewById(R.id.womanRb);        linearLayout= findViewById(R.id.check_pro);        majors.add("计算机科学与技术");        majors.add("计算机应用");        adapter = new ArrayAdapter
       
        (this, R.layout.textview, majors);        major.setAdapter(adapter);        spinner = findViewById(R.id.spinner);        ed_name = findViewById(R.id.ed_name);        ed_age = findViewById(R.id.ed_age);        initlSpinner();        Bundle bundle = this.getIntent().getExtras();        if (bundle != null){
               Student student = (Student) bundle.get("student");            position = (int) bundle.get("position");            String names = student.getName();            String majors = student.getMajor();            String ages = student.getAge();            String sexs = student.getSex();            String xys = student.getXy();            String times = student.getTime();            String courses[] = student.getCourse();            checkshow(linearLayout,courses);            xy = xys;            xyposition=setspinnerinfo(xy);            ed_name.setText(names);            major.setText(majors);            ed_age.setText(ages);            time.setText(times);            spinner.setSelection(xyposition,true);            if (sexs.equals("男")){
                   manRb.setChecked(true);            }else if (sexs.equals("女")){
                   womanRb.setChecked(true);            }        }        submit.setOnClickListener(new View.OnClickListener() {
               @Override            public void onClick(View v) {
                   String name =ed_name.getText().toString();                String age = ed_age.getText().toString();                String times = time.getText().toString();                course=getCheckBoxInfo(linearLayout);                sexdate = getRadioInfo(sexselect);                majordata = major.getText().toString();                if (name==null||name.length()==0){
                       ed_name.setError("不能为空！");                    Toast.makeText(StuInfoActivity.this,"请输入姓名",Toast.LENGTH_LONG).show();                    return;                }else if (juagenum(name)){
                       ed_name.setError("名字不能含有数字！");                    Toast.makeText(StuInfoActivity.this,"姓名不能包含数字",Toast.LENGTH_LONG).show();                    return;                }else if (age==null||age.length()==0){
                       ed_age.setError("不能为空！");                    Toast.makeText(StuInfoActivity.this,"请输入年龄",Toast.LENGTH_LONG).show();                    return;                }                Student student = new Student(name,age,sexdate,majordata,xy,times,course);                students1.add(student);                Intent intent = new Intent();                intent.setClass(StuInfoActivity.this,MainActivity.class);                intent.putExtra("students",student);                intent.putExtra("position",position);                setResult(MainActivity.ADDCODE,intent);                finish();            }        });        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
               @Override            public void onItemSelected(AdapterView
         parent, View view, int position, long id) {
                   xy = parent.getItemAtPosition(position).toString();            }            @Override            public void onNothingSelected(AdapterView
         parent) {
               }        });        time.setKeyListener(null);        time.setOnClickListener(new View.OnClickListener() {
               @Override            public void onClick(View v) {
                   DatePickerDialog.OnDateSetListener listener = new DatePickerDialog.OnDateSetListener() {
                       @Override                    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                           time.setText(year + "-" + month + "-" + dayOfMonth);                    }                };                getDate();                DatePickerDialog datePickerDialog = new DatePickerDialog(StuInfoActivity.this, listener, year, month, day);                datePickerDialog.show();            }        });    }    @Override    protected void onActivityResult(int requestCode,int resultCode,Intent data) {
           super.onActivityResult(requestCode, resultCode, data);        if (data == null) return;        Bundle bundle = data.getExtras();        Student student = (Student) bundle.get("student");        if (requestCode == MainActivity.EDITCODE ){
           /*    int position = (int) bundle.get("position");*/            String names = student.getName();            String majors = student.getMajor();            ed_name.setText(names);            major.setText(majors);        }    }    private void getDate() {
           cal=Calendar.getInstance();        year=cal.get(Calendar.YEAR);        month=cal.get(Calendar.MONTH);        day=cal.get(Calendar.DAY_OF_MONTH);    }    private void initlSpinner(){
           String[] arr= getResources().getStringArray(R.array.xyinfo);        ArrayAdapter
        
          arrayAdapter = new ArrayAdapter
         
          (this, android.R.layout.simple_spinner_dropdown_item,arr ); spinner.setAdapter(arrayAdapter); } private boolean isDigtal(String num){ return num.matches("[0-9]{1,}"); } private boolean juagenum(String num){ int len = num.length(); for (int i=0;i