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CUSTOMIZATION_BUILDER.md

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State builder

Certain parameters are only modifiable using the state builder of the MaterialCalendarView. Using the builder prevents from updating the view each time one of the setters is called. The view is updated when calling Builder#commit() and that improve performances. Previously, the fields could be customize using casual setters.

Here is a concrete example of how to use the builder:

mcv.state().edit()
   .setFirstDayOfWeek(Calendar.WEDNESDAY)
   .setMinimumDate(CalendarDay.from(2016, 4, 3))
   .setMaximumDate(CalendarDay.from(2016, 5, 12))
   .setCalendarDisplayMode(CalendarMode.WEEKS)
   .commit();

state.edit() vs newState()

Using mcv.state().edit() will preserve the current state of the MaterialCalendarView while mcv.newState() will initialize the builder with new parameters. Only the fields that are modifiable using the builder can be reset or edit. Here is the list of the fields:

  • First Day Of Week
  • Minimum Date
  • Maximum Date
  • Calendar Display Mode

As an example, if you are setting firstDayOfWeek inside your xml, and you want to preserve the field when using the builder, you should use state.edit(). However if you don't want to preserve any current parameters from the list above, use newState(). In most cases state.edit() should be the right method to use.

First Day Of The Week

The default first day of the week is Sunday. You can set a custom day of the week by setting mcv_firstDayOfWeek in xml, or by calling setFirstDayOfWeek(). The xml attribute is an enum of sunday through saturday and setFirstDayOfWeek() accepts values from java.util.Calendar such as Calendar.MONDAY.

Date Ranges

By default, the calendar displays months for 200 years before today and 200 years after. You can specify different minimum and maximum dates by calling setMinimumDate(CalendarDay) and setMaximumDate(CalendarDay). Passing null will reset back to the default 200 years. There are also convenience methods that accept a Calendar or a Date object and convert them to a CalendarDay using the relevant CalendarDay.from() factory method.

Calendar Display Mode

MaterialCalendarView propose two display modes: weekly and monthly. You can set the display mode in your xml using the attribute mcv_calendarMode with month for monthly mode, or week for weekly mode. You can also use the builder setCalendarDisplayMode(CalendarMode) parameter.

It is important to note that the CalendarMode.WEEKS is still experimental.