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Light Calendar View

A lightweight monthly calendar view for Android, fully written in Kotlin. Designed to meet the minimum demands for typical calendars.


  • Target SDK version: 23
  • Minimum SDK version: 15


  1. Add these settings to your app-level build.gradle.
dependencies {

  compile '' 
  1. Add LightCalendarView into your layouts or view hierarchy.
<layout xmlns:android="">




 android:layout_height="wrap_content" />
  ... </layout>



Lightweight Calendar View can be easily customized by setting properties in the layout XML file.










The following properties are available:

property name type description
app:lcv_weekDayTextSize dimension The text size of weekdays
app:lcv_dayTextSize dimension The text size of days
app:lcv_textColor color or resource The text color of weekdays and days
app:lcv_selectionColor color or resource The background color of selections
app:lcv_accentColor color or resource The color of accents
app:lcv_firstDayOfWeek integer The first day of the week (0 = Sunday, 1 = Monday, ..., 6 = Friday)

The customizations of text colors of selected days or today are done by setting <selector /> color resources to app:lcv_textColor, app:lcv_selectionColor, or app:lcv_accentColor with the following resource files for example.

NOTE that in all of the color resources, android:state_* are used to distinguish the state of each day view as follows:

state description
android:state_active indicates whether the day view is for today ( true) or other days ( false)
android:state_selected indicates whether the day view is selected ( true) or not ( false)


<selector xmlns:android="">
  <!-- the color of today when selected -->
  <item android:color="#ffd2d2" android:state_active="true" android:state_selected="true" />

<!-- the color of today -->
  <item android:color="#c417ce" android:state_active="true" />

<!-- the color of the selected day -->
  <item android:color="#ffffff" android:state_selected="true" />

<!-- the color of other days -->
  <item android:color="#7c7c7c" /> </selector>


<selector xmlns:android="">
  <!-- the background color of today when selected -->
  <item android:color="#3944ba" android:state_active="true" android:state_selected="true" />

<!-- the background color of the other days when selected -->
  <item android:color="#565656" android:state_selected="true" /> </selector>


<selector xmlns:android="">
  <!-- the color of accents in today when selected -->
  <item android:color="#ffd2d2" android:state_active="true" android:state_selected="true" />

<!-- the color of accents in today -->
  <item android:color="#c417ce" android:state_active="true" />

<!-- the color of accents in other days when selected -->
  <item android:color="#ffffff" android:state_selected="true" />

<!-- the color of accents in other days -->
  <item android:color="#7c7c7c" /> </selector>


Add OnCalendarStateUpdatedListener to the calendar view to detect and handle the following events:

  • onSelectMonth(): the user swipes and changes the month
  • onSelectDay(): the user clicks one day in a month view

See the example implementation in MainActivity.kt of this listener on github.


Use MonthView#setAccents(Date, Collection<Accent>) or MonthView#setAccents(Map<Date, Collection<Accent>>) to add decorations to each day.


calendarView.setOnStateUpdatedListener(object : LightCalendarView.OnStateUpdatedListener {

  override fun onMonthSelected(date: Date, view: MonthView) {

val cal = Calendar.getInstance().apply {
 time = date 

val monthEvents: Map<Date, List<Event>> = someApi.getMonthEvents(cal[Calendar.YEAR], cal[Calendar.MONTH])

val monthAccents: Map<Date, List<Accent>> = monthEvents.mapValues {
 event -> DotAccent(radius = 10f, color = event.color, key = event) 


Coloring Day of The Week

Use LightCalendarView#setWeekDayFilterColor(weekDay: WeekDay, color: Int?) and LightCalendarView#setDayFilterColor(weekDay: WeekDay, color: Int?) to set the color scheme of day of the week in WeekDayView (e.g. Sunday, Monday, ...) and DayView (e.g. 1, 2, ...) respectively.

// coloring "sunday" (day of the week) in red calendarView.setWeekDayFilterColor(WeekDay.SUNDAY, Color.RED)  // coloring sundays (days) in red calendarView.setDayFilterColor(WeekDay.SUNDAY, Color.RED)

Note the library internally uses these color as ColorFilter, meaning it is overlayed on top of the text color set through LightCalendarView#setTextColor(color: Int).

Further Customizations

See the Wiki for more information and descriptions on futher customizations.


Contributions to this library, including bug-reporting, bug-fixes, and enhancements are always welcomed. Just create an issue, fork us and send a pull request.


Copyright 2016 RECRUIT MARKETING PARTNERS CO., LTD.  Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License. You may obtain a copy of the License at  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. 


Light Calendar View is owned and maintained by Recruit Marketing Partners Co., Ltd, and was originally created by


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