private class SubjectDataFilter extends Filter {
        @Override
        protected FilterResults performFiltering(CharSequence charSequence) {
            FilterResults filterResults = new FilterResults();
           // charSequence = charSequence.toString();
            if (charSequence != null && charSequence.toString().length() > 0) {
                ArrayList<Student> arrayList1 = new ArrayList<Student>();
                double similarity=0;
                    Student subject=null;
                    boolean debug=false;
                arrayList1.remove(subject);
                
                for (int i = 0, l = MainList.size(); i < l; i++) {
                 subject = MainList.get(i);
                   String[]strArray = charSequence.toString().split(" ");
                   String subject1=String.valueOf(subject);
                    //similarity=StringSimilarity.similarity(subject1,charSequence.toString());
                    int sim = FuzzyMatch.getRatio(subject1,charSequence.toString(),debug);
                    //if (similarity>0.005)
                    if (sim>0)
                    {
                       //subject.setQonun(String.valueOf(similarity)+subject);
                      subject.setCoeff(sim);
                        //subject.setQonun(String.valueOf(sim)+"%"+subject);
                        subject.setQonun( "%"+ subject);
                       // arrayList1.add(subject);
                        arrayList1.add(i,subject);
                    }
                    }

subject.setCoeff(sim);
subject.setQonun( "%"+ subject);