Code to check whether message come today,yesterday and past date

TextView tv_date = (TextView) convertView.findViewById(R.id.tv_date); //getting reference of textview
                if (tv_date.getVisibility() == View.VISIBLE) {
                    tv_date.setVisibility(View.GONE);
                }
                // simplifyDate(DateFormatter.getFormattedDateFromISOString(message.getTimeStamp()))
                // 2018-06-02T04:27:21.127Z

                try {

                    if (position > 0) {
                        tempDate = messages.get(position - 1).getTimeStamp().split("T");
                        chatDate = sdf.parse(String.format(Locale.ENGLISH, "%s", tempDate[0]));
                    }
                    String[] tempDate2 = messages.get(position).getTimeStamp().split("T");

                    Date chatDate2 = sdf.parse(String.format(Locale.ENGLISH, "%s", tempDate2[0]));

                    int diff = 0;
                  try {
                        if (position == messages.size() - 1 && currentDate.equals(chatDate2) && !chatDate2.equals(chatDate)) {
                            if (tv_date.getVisibility() == View.GONE) {
                                tv_date.setVisibility(View.VISIBLE);
                            }
                            tv_date.setText(getDateString(chatDate2));
                        } else if (position < messages.size() - 1) {
                            diff = chatDate.compareTo(chatDate2);


                            switch (diff) {

                                case -1:
                                    if (tv_date.getVisibility() == View.GONE) {
                                        tv_date.setVisibility(View.VISIBLE);
                                    }
                                    tv_date.setText(getDateString(chatDate2));

                                    break;
                                case 1:
        case 0:
                                    if (tv_date.getVisibility() == View.VISIBLE) {
                                        tv_date.setVisibility(View.GONE);
                                    }
                                    break;
                            }
                        }

                        if (position == 0) {
                            if (tv_date.getVisibility() == View.GONE) {
                                tv_date.setVisibility(View.VISIBLE);
                            }
                            tv_date.setText(getDateString(chatDate2));
                        }
                    } catch (Exception e) {
                        Log.e(TAG, "Date Compare: Exception: " + e.getMessage());
                    }


                } catch (ParseException e) {
                    Log.e(TAG, "getView: ParseException: " + e.getMessage());
                } catch (Exception e) {
                    Log.e(TAG, "getView: Exception: " + e.getMessage());
                }
    
  @NonNull
     private String getDateString(@NonNull Date chatDate2) {
        String s = null;
        if (today.equalsIgnoreCase(sdf.format(chatDate2))) {            // if  its toady date
            s = activity.getString(R.string.date_today);
        } else if (yesterday.equalsIgnoreCase(sdf.format(chatDate2))) { // else if its yesterday date
            s = activity.getString(R.string.date_yesterday);
        } else {                                                        // else print date in WhatsApp format "Wed, 21 May"
            s = new SimpleDateFormat("EEE, dd MMM", Locale.getDefault()).format(chatDate2);
        }
        return s;
     }

     private String getYesterdayDate() {

        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DATE, -1);
        return sdf.format(cal.getTime());
    }