filter.java

    private List<Recent> items= null;
    private ArrayList<Recent> arrayList;

    public RecyclerAdapter(Context context, List<Recent> items) {
        this.mCtx=context;
        this.items=items;
        arrayList = new ArrayList<Recent>();
        arrayList.addAll(items);
    }


    public void filter(String charText) {
        charText = charText.toLowerCase(Locale.getDefault());
        items.clear();
        if (charText.length() == 0) {
            items.addAll(arrayList);
        } else {
            for (Recent recent : arrayList) {
                String name = recent.getAddress();
                if (name.toLowerCase().contains(charText)) {
                    items.add(recent);
                }
            }
        }
        notifyDataSetChanged();
    }