DatePicker Dialog in Android With Kotlin

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<layout>
<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:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Dialog Example"
         />
    
<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/showdate"
    />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/datepick"
        android:text="Pick the date"
        android:layout_margin="10dp"/>

   

</LinearLayout>
</layout>

MainActivity.kt

package com.androindian.dialogs

import android.app.DatePickerDialog
import android.app.Dialog
import android.app.TimePickerDialog
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.TimePicker
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.databinding.DataBindingUtil
import com.androindian.dialogs.databinding.ActivityMainBinding
import java.util.Calendar
import javax.xml.datatype.DatatypeConstants.MONTHS

class MainActivity : AppCompatActivity() {

    var binding: ActivityMainBinding?=null
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding= DataBindingUtil.setContentView(this,R.layout.activity_main)

      
        binding?.datepick?.setOnClickListener {
            var calendar=Calendar.getInstance()
            var myear=calendar.get(Calendar.YEAR)
            var mmonth=calendar.get(Calendar.MONTH)
            var mday=calendar.get(Calendar.DAY_OF_MONTH)

            var datePickerDialog=DatePickerDialog(this@MainActivity,
                DatePickerDialog.OnDateSetListener { view, year, monthOfYear, dayOfMonth ->

                // Display Selected date in textbox
                binding?.showdate?.setText("" + dayOfMonth + " -" + monthOfYear + "- " + year)

            }, myear, mmonth, mday)

            //datePickerDialog.getDatePicker().setMaxDate(System.currentTimeMillis());
            datePickerDialog.getDatePicker().setMinDate(System.currentTimeMillis());

            datePickerDialog.show()

        }

        
    }
}