Question

我有一个问题，当我在搜索视图中搜索某个项目时，我能够搜索该项目（对象），但是当我清除文本时（比如取消搜索，当没有文本时），列表显示我之前搜索的同一个对象，在取消后没有显示所有对象。

我试过了：

适配器类：

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();
        }
    }

包含SearchView的片段类：

@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;
            }
        });

片段中的过滤方法：

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

您只需在搜索栏中添加对空字段的检查。当查询为空时，将所有元素添加回列表中，并通知数据集更改。

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

initList方法将初始化所有列表项，并将适配器链接到它。在notifyDataSetChanged方法的末尾执行onQueryTextChange，以便在搜索查询中的每次更改后通知适配器有关已更改的数据集。

如何更新搜索视图中的列表

1 个答案: