This is my code

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

        emailResults = new ArrayList<GetEmailFromDatabase>();

        //int[] colors = {0,0xFFFF0000,0};
        //getListView().setDivider(new GradientDrawable(Orientation.RIGHT_LEFT, colors));
        //getListView().setDividerHeight(2);

        emailListFeedAdapter = new EmailListFeedAdapter(this, R.layout.email_listview_row, emailResults);
        setListAdapter(this.emailListFeedAdapter);

        getResults();
        if(emailResults != null && emailResults.size() > -1){
            emailListFeedAdapter.notifyDataSetChanged();
        for(int i=0;i< emailResults.size();i++){
            try {

Here I getting email Sent date

                emailListFeedAdapter.add( emailResults.get(i));

                datetime_text1 = emailResults.get(i).getDate();
                formatter1 = new SimpleDateFormat();
                formatter1 = DateFormat.getDateInstance((DateFormat.MEDIUM));

                Calendar currentDate1 = Calendar.getInstance();

                Item_Date1 = formatter1.parse(datetime_text1);
                current_Date1 = formatter1.format(currentDate1.getTime());
                current_System_Date1 = formatter1.parse(current_Date1);

                currentDate1.add(Calendar.DATE, -1);

                yesterdaydate = formatter1.format(currentDate1.getTime());
                yeaterday_Date = formatter1.parse(yesterdaydate);

                currentDate1.add(Calendar.DATE, -2);

                threeDaysback = formatter1.format(currentDate1.getTime());
                Three_Days_Back = formatter1.parse(threeDaysback);

Here I am comparing current date with list view item date, and here is my problem, dates are matching but it is not entering in if condition I tried in so many ways but nothing worked the code for separator is bellow.

                if(Item_Date.compareTo(current_System_Date)==0){
                    if(index1){

                       emailListFeedAdapter.addSeparatorItem("SEPARATOR");
                       //i--;
                       index1=false;
                    }


                }
                else if(yeaterday_Date.compareTo(Item_Date1)==0){
                    if(index2){
                       emailListFeedAdapter.addSeparatorItem("SEPARATOR");
                       //i--;
                       index2 = false;
                    }

                }
                else if(Item_Date1.compareTo(Three_Days_Back)==0){
                    if(index3){
                       emailListFeedAdapter.addSeparatorItem("SEPARATOR");
                       //i--;
                       index3 = false;
                    }

                }
                } catch (ParseException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
        }
     }
}

In EmailListFeedAdapter

     private TreeSet<Integer> mSeparatorsSet = new TreeSet<Integer>();
     public void addSeparatorItem(final String item) {
         //itemss.add(emailResults.get(0));
            // save separator position
            mSeparatorsSet.add(itemss.size() - 1);
            notifyDataSetChanged();
        }
    @Override
    public int getItemViewType(int position) {
         return mSeparatorsSet.contains(position) ? TYPE_SEPARATOR : TYPE_ITEM;
       }
         holder = new ViewHolder();
        switch (type) {

            case TYPE_ITEM:
                 emailView= inflater.inflate(R.layout.email_listview_row, null);

                break;
            case TYPE_SEPARATOR:
                 emailView= inflater.inflate(R.layout.item2, null);
                 holder.textView = (TextView)emailView.findViewById(R.id.textSeparator);
                 emailView.setTag(holder);
                 holder.textView.setText("SEPARATOR");
                break;
        }

Here is ViewHolder class

       public static class ViewHolder {
        public TextView textView;
    }

if anybody knows then please tell me where I am doing wrong.

Thanx