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

public class AutoCompleteAdapter  extends ArrayAdapter implements Filterable {
    private List  listObjects;
    List suggestions = new ArrayList<>();
    private Context context;
    public AutoCompleteAdapter(Context context, List listObjects) {
        super(context, R.layout.list_item_simple, listObjects);
        this.listObjects = new ArrayList<>(listObjects);
        this.context = context;
    }
    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 constraint, FilterResults results) {
        if(results == null){
            return;
        }
        List filteredList = (List) results.values;
        if(results.count > 0) {
            clear();
            for (T filteredObject : filteredList) {
                add(filteredObject);
            }
            notifyDataSetChanged();
        }
    }
};
@Override
public Filter getFilter() {
    return mFilter;
}
private static class ViewHolder {
    TextView title;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
    Object listObject = getItem(position);
    final ViewHolder viewHolder; // view lookup cache stored in tag
    if (convertView == null) {
        viewHolder = new ViewHolder();
        LayoutInflater inflater = LayoutInflater.from(getContext());
        convertView = inflater.inflate(R.layout.list_item_simple, parent, false);
        viewHolder.title = (TextView) convertView.findViewById(R.id.title);
        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) convertView.getTag();
    }
    viewHolder.title.setText(listObject.toString());
    return convertView;
}

}