private void setNextNavigationButton() {
        ivNext = (ImageView) flNavigationButtons.findViewById(R.id.iv_next_month);
        ivNext.setImageResource(settingsManager.getNextMonthIconRes());
        ivNext.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                goToNextMonth();
            }
        });
    }
Creates Next/Previous buttons to navigate months.
Visible only in HORIZONTAL mode
cosmocalendar/src/main/java/com/applikeysolutions/cosmocalendar/view/CalendarView.java