JavaUtils.java

class Utils {
  
  public static void changeFragment(
            FragmentActivity activity,
            Fragment fragment, @IdRes int id,
            boolean addToStack,
            String tag,
            boolean shouldAnimate,
            boolean replace
    ) {
        FragmentTransaction ft = activity.getSupportFragmentManager().beginTransaction();
        if (shouldAnimate) ft.setCustomAnimations(
                R.anim.anim_next_slide_in,
                R.anim.anim_next_slide_out,
                R.anim.anim_prev_slide_in,
                R.anim.anim_prev_slide_out
        );
        if (replace) ft.replace(id, fragment, tag);
        else ft.add(id, fragment, tag);
        if (addToStack) ft.addToBackStack(tag);
        ft.commit();

        if (fragment instanceof BaseFragment) {
            SSApp.getInstance().activeFragment = (BaseFragment) fragment;
        }
    }
  
    public static String getCurrentDateCode(String format) {
        return new SimpleDateFormat(format, Locale.getDefault()).format(new Date());
    }
  
    public static long getDaysDiff(String fromDateStr, String toDateStr, String dateFormat) {
        try {
            Date date1 =new SimpleDateFormat(dateFormat).parse(fromDateStr);
            Date date2 =new SimpleDateFormat(dateFormat).parse(toDateStr);

            long diff = date2.getTime() - date1.getTime();

            long days = TimeUnit.MILLISECONDS.toDays(diff);
            System.out.println("Days " + days);
            return days;

        } catch (ParseException e) {
            e.printStackTrace();
        }

        return -1;
    }
  
   private static int getPreviousYear() {
        Calendar prevYear = Calendar.getInstance();
        prevYear.add(Calendar.YEAR, -1);
        return prevYear.get(Calendar.YEAR);
    }

    private static int getPreviousMonth() {
        Calendar prevMonth = Calendar.getInstance();
        prevMonth.add(Calendar.MONTH, -1);
        return prevMonth.get(Calendar.MONTH);
    }

    public static String yesterday() {
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DATE, -1);
        DateFormat dateFormat = new SimpleDateFormat(GlobalEnum.DATE_FORMAT);
        return dateFormat.format(cal.getTime());
    }


    public static String getFirstDayOfWeek() {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DAY_OF_MONTH, Calendar.MONDAY - calendar.get(Calendar.DAY_OF_WEEK));
        int year1 = calendar.get(Calendar.YEAR);
        int month1 = calendar.get(Calendar.MONTH) + 1;
        int day1 = calendar.get(Calendar.DAY_OF_MONTH);
        return year1 + "-" + CommonUtils.getMonthDate("" + (month1)) + "-" + CommonUtils.getMonthDate("" + day1);

    }

    public static String getLastDayOfWeek() {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DAY_OF_MONTH, Calendar.SUNDAY);
        int year1 = calendar.get(Calendar.YEAR);
        int month1 = calendar.get(Calendar.MONTH) + 1;
        int day1 = calendar.get(Calendar.DAY_OF_MONTH);
        return year1 + "-" + CommonUtils.getMonthDate("" + (month1)) + "-" + CommonUtils.getMonthDate("" + day1);

    }

    public static String getFirstDayOfMonth() {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DAY_OF_MONTH, Calendar.MONDAY - calendar.get(Calendar.DAY_OF_MONTH));
        int year1 = calendar.get(Calendar.YEAR);
        int month1 = calendar.get(Calendar.MONTH) + 1;
        int day1 = calendar.get(Calendar.DAY_OF_MONTH);
        return year1 + "-" + CommonUtils.getMonthDate("" + (month1)) + "-" + CommonUtils.getMonthDate("" + 1);

    }

    public static String getLastDayOfMonth() {
        Calendar calendar = Calendar.getInstance();
        calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        calendar.add(Calendar.DAY_OF_MONTH, Calendar.DAY_OF_MONTH);

        int year1 = calendar.get(Calendar.YEAR);
        int month1 = calendar.get(Calendar.MONTH) + 1;
        int day1 = calendar.get(Calendar.DAY_OF_MONTH);
        return year1 + "-" + CommonUtils.getMonthDate("" + (month1)) + "-" + CommonUtils.getMonthDate("" + day1);

    }


    public static String getFirstDayOfYear() {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DAY_OF_MONTH, Calendar.MONDAY - calendar.get(Calendar.DAY_OF_MONTH));
        int year1 = calendar.get(Calendar.YEAR);
        return year1 + "-" + CommonUtils.getMonthDate("" + (1)) + "-" + CommonUtils.getMonthDate("" + 1);
    }

    public static String getLastDayOfYear() {
        Calendar calendar = Calendar.getInstance();
        calendar.getActualMaximum(Calendar.DAY_OF_YEAR);
        int year1 = calendar.get(Calendar.YEAR);
        int month1 = calendar.get(Calendar.MONTH) + 1;
        int day1 = calendar.get(Calendar.DAY_OF_MONTH);
        return year1 + "-" + CommonUtils.getMonthDate("" + (month1)) + "-" + CommonUtils.getMonthDate("" + day1);
    }
  
  public static int getDateDifferenceInMonth(String strStartDate, String strEndDate) {
        try {

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");


            Calendar startCalendar = new GregorianCalendar();
            Date date1 = sdf.parse(sdf.format(startCalendar.getTime()));

            startCalendar.setTime(date1);

            Calendar endCalendar = new GregorianCalendar();
            Date endDate = sdf.parse(sdf.format(endCalendar.getTime()));

            endCalendar.setTime(endDate);

            int diffYear = endCalendar.get(Calendar.YEAR) - startCalendar.get(Calendar.YEAR);
            int diffMonth = diffYear * 12 + endCalendar.get(Calendar.MONTH) - startCalendar.get(Calendar.MONTH);

            return diffMonth;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return 0;
    }
  
  public static String getManufacturerAndModelName() {
        String manufacturer = Build.MANUFACTURER;
        String model = Build.MODEL;
        if (model.startsWith(manufacturer)) {
            return (model);
        }
        return manufacturer + " " + model;
    }

    public static String getDeviceManufacturer() {
        String manufacturer = Build.MANUFACTURER;
        String model = Build.MODEL;
        if (model.startsWith(manufacturer)) {
            return (model);
        }
        return (manufacturer);
    }

}