Add the Event in Calendar

Create a new Event in Android Calendar

    private void createEvent(String eventName,String eventDescription,Date startDate,int totalHoursDuration,Date repeatUtil){

        ContentResolver cr = getActivity().getContentResolver();
        ContentValues values = new ContentValues();
        values.put(CalendarContract.Events.DTSTART,""+startDate.getTime());
        values.put(CalendarContract.Events.TITLE,eventName);
        values.put(CalendarContract.Events.DESCRIPTION,eventDescription);
        TimeZone timeZone = TimeZone.getDefault();
        values.put(CalendarContract.Events.EVENT_TIMEZONE, timeZone.getID());
        values.put(CalendarContract.Events.CALENDAR_ID, 1);
        if(repeatUtil != null){
            String UntilDate = new SimpleDateFormat("yyyymmdd").format(repeatUtil.getTime());
            values.put(CalendarContract.Events.RRULE, "FREQ=DAILY;UNTIL="+UntilDate);
        }
        values.put(CalendarContract.Events.DURATION, "+P"+totalHoursDuration+"H");
        values.put(CalendarContract.Events.HAS_ALARM, 1);
        cr.insert(CalendarContract.Events.CONTENT_URI, values);

    }

Need a permission

    <uses-permission android:name="android.permission.READ_CALENDAR"/>
    <uses-permission android:name="android.permission.WRITE_CALENDAR"/>