Program to display Date and time using Dialog box |Android Program|

Activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView"
        android:textSize="40dp"/>

    <Button
        android:id="@+id/btndate"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Set the date" />

    <Button
        android:id="@+id/btntime"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Set the time" />
</LinearLayout>

MainActivity.java

package com.example.dateandtime;

import androidx.appcompat.app.AppCompatActivity;

import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;

import java.text.DateFormat;
import java.util.Calendar;

public class MainActivity extends AppCompatActivity {
    DateFormat fmtDateandTime=DateFormat.getDateTimeInstance();
    TextView lblDateandTime;
    Calendar myCalender=Calendar.getInstance();
    DatePickerDialog.OnDateSetListener d=new DatePickerDialog.OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
            myCalender.set(Calendar.YEAR,year);
            myCalender.set(Calendar.MONTH,month);
            myCalender.set(Calendar.DAY_OF_MONTH,dayOfMonth);
            updateLabel();
        }
    };
    TimePickerDialog.OnTimeSetListener t=new TimePickerDialog.OnTimeSetListener() {
        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            myCalender.set(Calendar.HOUR_OF_DAY,hourOfDay);
            myCalender.set(Calendar.MINUTE,minute);
            updateLabel();
        }
    };
    public void updateLabel(){
        lblDateandTime.setText(fmtDateandTime.format(myCalender.getTime()));
    }

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

        lblDateandTime=findViewById(R.id.textView);
        Button btndate=findViewById(R.id.btndate);
        btndate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new DatePickerDialog(MainActivity.this,d,myCalender.get(Calendar.YEAR),
                        myCalender.get(Calendar.MONTH),myCalender.get(Calendar.DAY_OF_MONTH)).show();
            }
        });
        Button btntime=findViewById(R.id.btntime);
        btntime.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new TimePickerDialog(MainActivity.this,t,myCalender.get(Calendar.HOUR_OF_DAY),
                        myCalender.get(Calendar.MINUTE),true).show();
            }
        });
        updateLabel();
    }
}

Design