android studio disable days from date picker

Question

I want to disable some day from date picker I have an array that store the days I want to disable.

I have this code to disable the days from calendar

    for (Calendar loopdate = min_date_c;
                     min_date_c.before(max_date_c);
                     min_date_c.add(Calendar.DATE, 1), loopdate = min_date_c) {
                    int dayOfWeek = loopdate.get(Calendar.DAY_OF_WEEK);


                    if (dayOfWeek == Calendar.SATURDAY || dayOfWeek == Calendar.FRIDAY) {
                        Calendar[] disabledDays = new Calendar[1];
                        disabledDays[0] = loopdate;
                        datePickerDialog.setDisabledDays(disabledDays);
                    }
                }

and I tried this code to disable days that are stored in the arraylist, but it does not work. It only disables the first item from the arraylist

   ArrayList a=new ArrayList();
            a.add(1);  //saturday
            a.add(2);  //sunday
            a.add(3);  //monday
            int day;


            for(int i=0; i



How do I fix this?

Zain · Accepted Answer

You can use the material design component MaterialDatePicker to control the calendar more easily and efficiently; it allows you to control every single day of the calendar by implementing CalendarConstraints.DateValidator interface.

Specificlly in your issue, you need to disable particular days; so, you will create a class that implements CalendarConstraints.DateValidator, and then:

Override the needed methods, and build a Parcelable

CalendarConstraints.DateValidator Extends Parcelable in order to maintain the DateValidator across device configuration changes. Parcelable breaks when passed between processes.

Override isValid(long date) method that validates every single date in the calendar and returns a boolean that indicates whether this date is valid or not, in other meaning if the date is enabled or disabled/dimmed; so, if a date is valid, then it returns true, and that date will be enabled for selection by the user.

Hereunder, I will provide a Validator that disable Mondays in Feb.2020; and you can easily disable any days the same manner.

Implementing CalendarConstraints.DateValidator:

static class MondaysOutValidator implements CalendarConstraints.DateValidator {

    int mYear, mMonth, mDayOfWeek;

    MondaysOutValidator(int year, int month, int dayOfWeek) {
        mYear = year;
        mMonth = month;
        mDayOfWeek = dayOfWeek;
    }

    MondaysOutValidator(Parcel parcel) {
        mYear = parcel.readInt();
        mMonth = parcel.readInt();
        mDayOfWeek = parcel.readInt();
    }


    @Override
    public boolean isValid(long date) {

        List allXDayOfMonth = getAllXDayOfMonth(mYear, mMonth, mDayOfWeek);

        boolean isValidDays = false;
        for (int xDay : allXDayOfMonth) {
            Calendar calendarStart = Calendar.getInstance();
            Calendar calendarEnd = Calendar.getInstance();
            ArrayList minDate = new ArrayList<>();
            ArrayList maxDate = new ArrayList<>();
            calendarStart.set(mYear, mMonth, xDay - 1);
            calendarEnd.set(mYear, mMonth, xDay);
            minDate.add(calendarStart.getTimeInMillis());
            maxDate.add(calendarEnd.getTimeInMillis());
            isValidDays = isValidDays || !(minDate.get(0) > date || maxDate.get(0) < date);
        }

        return !isValidDays;

    }


    private static int getFirstXDayOfMonth(int year, int month, int dayOfWeek) {
        Calendar cacheCalendar = Calendar.getInstance();
        cacheCalendar.set(Calendar.DAY_OF_WEEK, dayOfWeek);
        cacheCalendar.set(Calendar.DAY_OF_WEEK_IN_MONTH, 1);
        cacheCalendar.set(Calendar.MONTH, month);
        cacheCalendar.set(Calendar.YEAR, year);
        return cacheCalendar.get(Calendar.DATE);
    }

    private static List getAllXDayOfMonth(int year, int month, int dayOfWeek) {
        final int ONE_WEEK = 7;
        int firstDay = getFirstXDayOfMonth(year, month, dayOfWeek);
        List xDays = new ArrayList<>();
        xDays.add(firstDay);

        Calendar calendar = new GregorianCalendar(year, month, firstDay);
        calendar.add(Calendar.DAY_OF_MONTH, ONE_WEEK); // adding 1 Week
        while (calendar.get(Calendar.MONTH) == month) {
            xDays.add(calendar.get(Calendar.DAY_OF_MONTH));
            calendar.add(Calendar.DAY_OF_MONTH, ONE_WEEK); // adding 1 Week
        }

        return xDays;
    }

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(mYear);
        dest.writeInt(mMonth);
        dest.writeInt(mDayOfWeek);
    }

    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {

        @Override
        public MondaysOutValidator createFromParcel(Parcel parcel) {
            return new MondaysOutValidator(parcel);
        }

        @Override
        public MondaysOutValidator[] newArray(int size) {
            return new MondaysOutValidator[size];
        }
    };


}

Then use this validator to build CalendarConstraints in order to apply these constraints on the calendar dates

/*
 * Limit selectable range to days other than Mondays of the month
 */
private CalendarConstraints.Builder mondayDisableConstraints() {
    CalendarConstraints.Builder constraintsBuilderRange = new CalendarConstraints.Builder();
    constraintsBuilderRange.setValidator(new MondaysOutValidator(2020, Calendar.FEBRUARY, Calendar.MONDAY));
    return constraintsBuilderRange;
}

And finally build your MaterialDatePicker in your activity/fragment

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    MaterialDatePicker.Builder builderRange = MaterialDatePicker.Builder.datePicker();
    builderRange.setCalendarConstraints(mondayDisableConstraints().build());
    builderRange.setTitleText("Select Date Range");
    MaterialDatePicker pickerRange = builderRange.build();
    pickerRange.show(getSupportFragmentManager(), pickerRange.toString());

}

And this is the output:

Wish that can help you out, and welcome for further support.

android studio disable days from date picker

Answers (2)

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