问显示Toast如果记录不匹配

EN

etserach.addTextChangedListener(new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {

        String st = etserach.getText().toString();
        if (!s.equals("") && s.length() > 0) {
            adapter_filter.filter(st);
        } else {
            adapter_filter.filter(st);
        }
    }
}

public void filter(String charText) {
    charText = charText.toLowerCase(Locale.getDefault());
    resultArrayshort.clear();
    if (charText.length() == 0) {
        resultArrayshort.addAll(citylistNew);
    } else {
        for (int i = 0; i < citylistNew.size(); i++) {
            String fullname = citylistNew.get(i).getClientNameE();
            if (fullname.toLowerCase(Locale.getDefault()).contains(charText)) {
                resultArrayshort.add(citylistNew.get(i));
            }
          /*  else{
                Toast.makeText(mContext,"Record not found",Toast.LENGTH_SHORT).show();
            } */
        }
    }
    notifyDataSetChanged();
}