How to use Date Time Picker Dialog in Kotlin Android?

This example demonstrates how to use Date Time Picker Dialog in Android Kotlin.
Step 1 − Create a new project in Android Studio, go to File ⇉ New Project and fill all required details to create a new project.
Step 2  − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="50dp"
      android:text="Tutorials Point"
      android:textAlignment="center"
         android:textColor="@android:color/holo_green_dark"
      android:textSize="32sp"
      android:textStyle="bold" />
   <Button
      android:id="@+id/btnPick"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerInParent="true"
      android:text="Pick Date and TIme" />
   <TextView
      android:id="@+id/textView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@id/btnPick"
      android:layout_centerInParent="true"
      android:layout_marginTop="10dp"
      android:textColor="@android:color/background_dark"
      android:textSize="12sp"
      android:textStyle="bold" />
</RelativeLayout>
Step 3 − Add the following code to src/MainActivity.kt
import android.app.DatePickerDialog
import android.app.TimePickerDialog
import android.os.Bundle
import android.text.format.DateFormat
import android.widget.Button
import android.widget.DatePicker
import android.widget.TextView
import android.widget.TimePicker
import androidx.appcompat.app.AppCompatActivity
import java.util.*
class MainActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener,
TimePickerDialog.OnTimeSetListener {
   lateinit var textView: TextView
   lateinit var button: Button
   var day = 0
   var month: Int = 0
   var year: Int = 0
   var hour: Int = 0
   var minute: Int = 0
   var myDay = 0
   var myMonth: Int = 0
   var myYear: Int = 0
   var myHour: Int = 0
   var myMinute: Int = 0
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      textView = findViewById(R.id.textView)
      button = findViewById(R.id.btnPick)
      button.setOnClickListener {
         val calendar: Calendar = Calendar.getInstance()
         day = calendar.get(Calendar.DAY_OF_MONTH)
         month = calendar.get(Calendar.MONTH)
         year = calendar.get(Calendar.YEAR)
         val datePickerDialog = 
            DatePickerDialog(this@MainActivity, this@MainActivity, year, month,day)
         datePickerDialog.show()
      }
   }
   override fun onDateSet(view: DatePicker?, year: Int, month: Int, dayOfMonth: Int) {
      myDay = day
      myYear = year
      myMonth = month
      val calendar: Calendar = Calendar.getInstance()
      hour = calendar.get(Calendar.HOUR)
      minute = calendar.get(Calendar.MINUTE)
      val timePickerDialog = TimePickerDialog(this@MainActivity, this@MainActivity, hour, minute,
      DateFormat.is24HourFormat(this))
      timePickerDialog.show()
   }
   override fun onTimeSet(view: TimePicker?, hourOfDay: Int, minute: Int) {
      myHour = hourOfDay
      myMinute = minute
      textView.text = "Year: " + myYear + "\n" + "Month: " + myMonth + "\n" + "Day: " + myDay + "\n" + "Hour: " + myHour + "\n" + "Minute: " + myMinute
   }
}
Step 4 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="app.com.kotlipapp">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −
Click here to download the project code.