Date Picker

Gradle Dependency

dependencies {
  ...
  implementation 'com.afollestad:date-picker:0.6.1'
}

Why?

Android includes a stock DatePicker in its framework, however this widget is very stubborn. It does not adapt to different view widths, making it difficult to use in modern UI. This library solves for that by creating a custom implementation, written completely in Kotlin.

Basics

It's simple, just add a DatePicker to your layout (with the fully qualified package name):

<com.afollestad.date.DatePicker
    android:id="@+id/datePicker"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    />

There are a few basic getters and setters:

val datePicker: DatePicker = // ...

val selectedDate: Calendar? = datePicker.getDate()

datePicker.setDate(
    year = 2019,
    month = Calendar.JUNE,
    selectedDate = 17
)
datePicker.setDate(Calendar.getInstance())

Styling

You can configure basic theme properties from your layout:

<com.afollestad.date.DatePicker
    xmlns:app="http://schemas.android.com/apk/res-auto"
    ...
    app:date_picker_selection_color="?colorAccent"
    app:date_picker_header_background_color="?colorAccent"
    app:date_picker_medium_font="@font/some_medium_font"
    app:date_picker_normal_font="@font/some_normal_font"
    app:date_picker_disabled_background_color="@color/disabled_color"
    app:date_picker_selection_vibrates="true"
    app:date_picker_calendar_horizontal_padding="4dp"
    />

(Note that in order for date_picker_selection_vibrates=true to have an effect, your app needs to declare the VIBRATE permission in its manifest.)

Callback

val datePicker: DatePicker = // ...

datePicker.addOnDateChanged { previousDate, newDate->
  // this library provides convenience extensions to Calendar like month, year, and dayOfMonth too.
}

// Removes all callbacks you've added previously with addOnDateChanged(...) 
datePicker.clearOnDateChanged()

Min and Max Dates

val datePicker: DatePicker = // ...

val minDate = datePicker.getMinDate()
datePicker.setMinDate(
  year = 2019,
  month = Calendar.JUNE,
  date = 17
)
datePicker.setMinDate(Calendar.getInstance())

val maxDate = datePicker.getMaxDate()
datePicker.setMaxDate(
  year = 2019,
  month = Calendar.JUNE,
  date = 20
)
datePicker.setMaxDate(Calendar.getInstance())