如何在搜索视图中更新列表

Question

I have an issue , when i search an item in a search view then i am able to search the item(Object) but when i clear the text (say cancel the search,when no text is there) the list is showing the same object which i searched before , not showing all the object after the cancel.

I tried :

Adapter Class:

public void animateTo(List<OrderPogo> models) {
        applyAndAnimateRemovals(models);
        applyAndAnimateAdditions(models);
        applyAndAnimateMovedItems(models);

    }

    private void applyAndAnimateRemovals(List<OrderPogo> newModels) {

        for (int i = items.size() - 1; i >= 0; i--) {
            final OrderPogo model = items.get(i);
            if (!newModels.contains(model)) {
                removeItem(i);
            }
        }
    }

    private void applyAndAnimateAdditions(List<OrderPogo> newModels) {

        for (int i = 0, count = newModels.size(); i < count; i++) {
            final OrderPogo model = newModels.get(i);
            if (!items.contains(model)) {
                addItem(i, model);
            }
        }
    }

    private void applyAndAnimateMovedItems(List<OrderPogo> newModels) {

        for (int toPosition = newModels.size() - 1; toPosition >= 0; toPosition--) {
            final OrderPogo model = newModels.get(toPosition);
            final int fromPosition = items.indexOf(model);
            if (fromPosition >= 0 && fromPosition != toPosition) {
                moveItem(fromPosition, toPosition);
            }
        }
    }

    public OrderPogo removeItem(int position) {
        final OrderPogo model = items.remove(position);
        notifyItemRemoved(position);
        return model;
    }

    public void addItem(int position, OrderPogo model) {
        items.add(position, model);
        notifyItemInserted(position);
    }

    public void moveItem(int fromPosition, int toPosition) {
        final OrderPogo model = items.remove(fromPosition);
        items.add(toPosition, model);
        notifyItemMoved(fromPosition, toPosition);
    }

    public class CustomFilter extends Filter {
        ArrayList<OrderPogo> arrayList;
        MaterialRecylerAdapter adapter;
        ArrayList<OrderPogo> filterArrayList;

        public CustomFilter(ArrayList<OrderPogo> arrayList, MaterialRecylerAdapter adapter) {
            this.arrayList = arrayList;
            this.adapter = adapter;
        }

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            if(filterArrayList!=null && filterArrayList.size()>0){
                Log.e("filterArrayList",""+filterArrayList.size());
             //   filterArrayList.addAll(arrayList);
            }


            FilterResults filterResults=new FilterResults();
            if(constraint!=null && constraint.length()>0){
                constraint=constraint.toString().toUpperCase();
                for(int i=0;i<arrayList.size();i++){
                    if(arrayList.get(i).getId().toUpperCase().contains(constraint)){
                        filterArrayList.add(arrayList.get(i));
                    }else if(arrayList.get(i).getLoadingLocation().toUpperCase().contains(constraint)){
                        filterArrayList.add(arrayList.get(i));
                    }else if(arrayList.get(i).getUnloadingLocation().toUpperCase().contains(constraint)){
                        filterArrayList.add(arrayList.get(i));
                    }else if(arrayList.get(i).getTruckNumberLrNmbr().toUpperCase().contains(constraint)){
                        filterArrayList.add(arrayList.get(i));
                    }else if(arrayList.get(i).getDistance().toUpperCase().contains(constraint)){
                        filterArrayList.add(arrayList.get(i));
                    }else if(arrayList.get(i).getDate().toUpperCase().contains(constraint)){
                        filterArrayList.add(arrayList.get(i));
                    }

                }
                filterResults.values = filterArrayList;
                filterResults.count = filterArrayList.size();


            }else{
                filterResults.values = items;
                filterResults.count = items.size();
              //  filterArrayList.addAll(arrayList);
//                filterResults.count= arrayList.size();
//                filterResults.values=arrayList;
            }

            return filterResults;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            //Here i want the arraylist from the recylerview without making the arraylist static

            items= (List<OrderPogo>) results.values;
             notifyDataSetChanged();
        }
    }

Fragment Class Containing SearchView:

@Override
            public boolean onQueryTextChange(String newText) {

                if(TextUtils.isEmpty(newText)){
                    try{
                        materialRecylerAdapter.getFilter().filter("");
                        Log.i("Nomad", "onQueryTextChange Empty String");
//                        placesListView.clearTextFilter();
//                        materialRecylerAdapter = new MaterialRecylerAdapter(getActivity(), (ArrayList<OrderPogo>) myOrderArrayList,nextFragmentFlag,"default");
//                        materialRecylerAdapter.notifyDataSetChanged();
                      //  materialRecylerAdapter.getFilter().filter(newText);
                    }catch(Exception e){

                    }

                }else{
                   // materialRecylerAdapter.getFilter().filter(newText.toString());
                    final List<OrderPogo> filteredModelList = filter(myOrderArrayList, newText);
                    materialRecylerAdapter.animateTo(filteredModelList);
                    recyclerView.scrollToPosition(0);
                }

                return true;
            }
        });

Filter Method in Fragment:

private List<OrderPogo> filter(List<OrderPogo> models, String query) {
        query = query.toLowerCase();

        final List<OrderPogo> filteredModelList = new ArrayList<>();
        for (OrderPogo model : models) {
            final String text = model.getId().toLowerCase();
            final String text1 = model.getLoadingLocation().toLowerCase();
            final String text2 = model.getUnloadingLocation().toLowerCase();
            final String text3= model.getDistance().toLowerCase();
            if (text.contains(query)) {
                filteredModelList.add(model);
            }else if(text1.contains(query)){
                filteredModelList.add(model);
            }else if(text2.contains(query)){
                filteredModelList.add(model);
            }else if(text3.contains(query)){
                filteredModelList.add(model);
            }
        }
        return filteredModelList;
    }

Answer 1

You just have to add a check for the empty field in the search bar. When the query is empty then add all the elements back in the list and notify for the data set change.

        @Override
        public boolean onQueryTextChange(String newText) {
            initList(); //reset data at the start
            if (newText.equals(""))
                initList(); //reset data when there is no query
            ...

The initList method will initialize all the list items and the adapter is linked to it. Do the notifyDataSetChanged at the end of the onQueryTextChange method to notify the adapter about the changed data set after each and every change in the search query.