Custom AutoCompleteTextView behavior

Question

Out of the box, the AutoCompleteTextView widget does not seem to be able to match the input string in the middle of a list value - the matches are always made a

Answer 1

Old question, but still relevant. Following the guidance of a few other questions implemented a custom adapter using filterable. I made a simple generic adapter that searches with contains. Quick notes on it:

I'm using butterknife, but easy to do the viewHolder with findviewbyid.

The layout R.layout.list_item_simple is a simple layout with the textview R.id.text_view_simple.

The object needs a toString that will be compared.

public class SimpleContainsAutocompleteAdapter  extends ArrayAdapter implements Filterable {
    private List  listObjects;
    List suggestions = new ArrayList<>();
    private int resource;

    private Filter mFilter = new Filter(){
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults filterResults = new FilterResults();

            if(constraint != null) {
                suggestions.clear();
                for(T object : listObjects){
                    if(object.toString().toLowerCase().contains(constraint.toString().toLowerCase())){
                        suggestions.add(object);
                    }
                }

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

            return filterResults;
        }

        @Override
        protected void publishResults(CharSequence contraint, FilterResults results) {
            if(results == null){
                return;
            }

            List filteredList = (List) results.values;
            if(results.count > 0) {
                clear();
                for (T filteredObject : filteredList) {
                    add(filteredObject);
                }
                notifyDataSetChanged();
            }
        }
    };

    public SimpleContainsAutocompleteAdapter(Context context, List listObjects) {
        super(context, R.layout.list_item_simple, listObjects);
        this.listObjects = new ArrayList<>(listObjects);
        this.resource = R.layout.list_item_simple;
    }

    @Override
    public Filter getFilter() {
        return mFilter;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        Object listObject = getItem(position);
        viewHolder holder;
        if(convertView != null) {
            holder = (viewHolder) convertView.getTag();
        }else{
            convertView = LayoutInflater.from(getContext()).inflate(resource, parent, false);
            holder = new viewHolder(convertView);
            convertView.setTag(holder);
        }

        holder.name.setText(listObject.toString());

        return convertView;
    }


    static class viewHolder {
        @InjectView(R.id.text_view_simple) TextView name;

        public viewHolder(View view) {
            ButterKnife.inject(this, view);
        }
    }
}