如何知道 CalendarView 中当前可见的月份和年份？

Question

I am developing an app that is based on MaterialCalendarView (prolificinteractive) I am decorating days with drawables etc. I want to know which month and year is currently visible to the user so that I can only apply the decorater for the current visible month and not all the months as it will slow the app for no reason. Note: I am not talking about the current selected date.

Answer 1

There's a OnMonthChangedListener already but it doesn't even have a month parameter, If you don't mind reflection: you can do this:

calview.setOnMonthChangedListener((widget, date) -> {
    try {
        Field currentMonthField = MaterialCalendarView.class.getDeclaredField("currentMonth");
        currentMonthField.setAccessible(true);
        int currentMonth = ((CalendarDay) currentMonthField.get(widget)).getMonth();
        // Do something, currentMonth is between 1 and 12.

    } catch (NoSuchFieldException | IllegalAccessException e) {
        // Failed to get field value, maybe library was changed.
    }
});

Or better yet, open and issue or make a pull request to either make that field public on pass its value when the listener is called.