MainActivity.kt
package com.cfsuman.kotlintutorials
import android.app.Activity
import android.os.Bundle
import android.widget.*
import java.util.*
class MainActivity : Activity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// get the widgets reference from XML layout
val calendarView = findViewById<CalendarView>(R.id.calendarView)
val button = findViewById<Button>(R.id.button)
val button2 = findViewById<Button>(R.id.button2)
// get a calendar instance
val calendar = Calendar.getInstance()
// first button click listener
button.setOnClickListener {
// set the calendar date to 31 march 1951
calendar.set(
// int: the value used to set the YEAR calendar field.
1951, // year
// int: the value used to set the MONTH calendar field.
// Month value is 0-based. e.g., 0 for January.
2, // month
// int: the value used to set the
// DAY_OF_MONTH calendar field.
31 // day of month
)
// finally, set this date to calendar view
calendarView.date = calendar.timeInMillis
}
// second button click listener
button2.setOnClickListener {
// set the calendar date as 3 nov 2025
calendar.set(
2025, // year
10, // month nov, 0 based index
3 // day of month
)
// finally, apply the date to calendar view
calendarView.setDate(
calendar.timeInMillis, // long: The date.
// boolean: Whether to animate the scroll
// to the current date.
false,
// boolean: Whether to center the current date
// even if it is already visible.
false
)
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/rootLayout"
android:background="#DCDCDC"
android:padding="24dp">
<CalendarView
android:id="@+id/calendarView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="Set 31 Mar 1951"
app:layout_constraintEnd_toStartOf="@+id/button2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/calendarView" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Set 3 Nov 2025"
app:layout_constraintBottom_toBottomOf="@+id/button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/button" />
</androidx.constraintlayout.widget.ConstraintLayout>
