Tukukkk

I have written code for an app that is designed to read XML and populate a listview with the data read. The data is stored in a containing class. I've created an adapter class as well as a custom filter. For some reason, when I type inside my searchView, nothing comes up! I've looked all over youtube/google for a few days and cannot find anything! please help!

private class ArticleAdapter extends ArrayAdapter<Article> implements Filterable {

        private List<Article> completeList = new ArrayList<>(articles);



        public ArticleAdapter(Context ctx) {



            super(ctx, 0);



        }



        @NonNull

        @Override

        public Filter getFilter() {

            return titleFilter;

        }





        public int getCount() {

            return articles.size();

        }



        public Article getItem(int position) {

            return articles.get(position);

        }



        public View getView(int position, View convertView, ViewGroup parent) {

            if (convertView == null) {

                convertView = LayoutInflater.from(getContext()).inflate(R.layout.title_layout, parent, false);



            }





            TextView articleTitle = convertView.findViewById(R.id.titleId);



            Article article = getItem(position);

            if (article != null) {

                articleTitle.setText(getItem(position).title);

            }





            return convertView;





        }



        Filter titleFilter = new Filter() {

            @Override

            protected FilterResults performFiltering(CharSequence constraint) {

                FilterResults results = new FilterResults();

                List<Article> suggestions = new ArrayList<>();

                if (constraint == null || constraint.length() == 0) {

                    suggestions.addAll(completeList);



                } else {

                    String filterPattern = constraint.toString().toLowerCase().trim();

                    for (Article title : completeList) {

                        if (title.getTitle().toLowerCase().contains(filterPattern)) {

                            suggestions.add(title);

                        }

                    }

                }

                results.values = suggestions;

                results.count = suggestions.size();



                return results;

            }



            @Override

            protected void publishResults(CharSequence constraint, FilterResults results) {

                clear();

                addAll((List) results.values);

                notifyDataSetChanged();



            }



            @Override

            public CharSequence convertResultToString(Object resultValue) {



                return ((Article) resultValue).getTitle();

            }

        };



       /* public long getItemId(int position) {

            return getItem(position).id;

        }

*/



    }





}

And this is the onCreateOptionsMenu method from my ArticleList class (main class)

 @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        MenuInflater inflater = getMenuInflater();

        inflater.inflate(R.menu.menu_search, menu);

        item = menu.findItem(R.id.menuSearch);

        searchView = (SearchView) item.getActionView();





        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {

            @Override

            public boolean onQueryTextSubmit(String query) {

                return false;

            }



            @Override

            public boolean onQueryTextChange(String newText) {

                if (articles.isEmpty()) {



                }

                adapter.getFilter().filter(newText);



                return false;

            }

        });

        return super.onCreateOptionsMenu(menu);

    }

I had a list of customers where I had to search a customer by their name.So here is the code.I hope it helps. :)

//Defined this two list global

private List customerList = new ArrayList<>();

private List searchCustomerList = new ArrayList<>();

In onCreate() I call this method : addTextListener();

private void addTextListener()
{

    try {



        searchBar.addTextChangedListener(new TextWatcher() {



            public void afterTextChanged(Editable s) {

            }



            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }



            public void onTextChanged(CharSequence query, int start, int before, int count) {



                query = query.toString().toLowerCase();

                searchCustomerList.clear();

                for (int i = 0; i < customerList.size(); i++) {

                    if (customerList.get(i) != null) {

                        String text = customerList.get(i).getCustomerName().toLowerCase();

                        if (text.toString().contains(query)) {

                            searchCustomerList.add(customerList.get(i));

                        }

                    }

                }

                Log.d("filterflower", "size: " + searchCustomerList.size());

                customerListAdapter.updateList(searchCustomerList);  // data set changed

            }

        });



    }catch (Exception e){

        e.printStackTrace();

    }

}

//Here is the updateList Method in my recycler adapter

 public void updateList(List<CustomerListDataModel> searchCustomerList) {

      customerList = searchCustomerList;

      notifyDataSetChanged();

    }