android - 如何将自定义适配器添加到 AutoCompleteTextView

Question

有什么简单的方法可以将 2 TextView 下拉列表设置为 AutoCompleteTextView。

有 android.R.layout.two_line_list_item 我找不到任何示例如何使用。

所以，我尝试了这个:

public class TwoLineDropdownAdapter extends BaseAdapter {

    private LayoutInflater mInflater = null;
    private Activity activity;
    public ArrayList<TwoLineDropDown> values = new ArrayList<TwoLineDropDown>();

    public TwoLineDropdownAdapter(Activity a, ArrayList<TwoLineDropDown> items) {

        values = items;
        activity = a;
        mInflater = (LayoutInflater) activity
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public int getCount() {

        return values.size();
    }

    public TwoLineDropDown getItem(int position) {

        return values.get(position);
    }

    public long getItemId(int position) {

        return position;
    }

    public static class ViewHolder {

        public TextView title;
        public TextView description;
    }

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

        ViewHolder holder;

        if (convertView == null) {

            holder = new ViewHolder();

            convertView = mInflater.inflate(R.layout.dropdown_text_twoline,
                    parent, false);
            holder.title = (TextView) convertView
                    .findViewById(R.id.text1);
            holder.description = (TextView) convertView
                    .findViewById(R.id.text2);

            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        return convertView;
    }

    public void add(TwoLineDropDown ei) {

        values.add(ei);
    }
}

但我在这里遇到一个问题:

TwoLineDropdownAdapter AutoCompleteAdapter = new TwoLineDropdownAdapter(this, items);
myAutoComplete.setAdapter(AutoCompleteAdapter);

设置适配器时显示:

Bound mismatch: The generic method setAdapter(T) of type AutoCompleteTextView is not applicable for the arguments (TwoLineDropdownAdapter). The inferred type TwoLineDropdownAdapter is not a valid substitute for the bounded parameter

如何解决？

谢谢

Answer 1

这里的代码对我有用，

将此适配器设置为 autocompletetextview

AutoCompleteTextView etProductSearch = (AutoCompleteTextView)getView().findViewById(R.id.edtSearchBoxTakeOrder);
ProductSearchAdapter adapter = new ProductSearchAdapter(getActivity(), android.R.layout.simple_dropdown_item_1line, productList);
etProductSearch.setAdapter(adapter );

ProductSearchAdapter 类

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.TextView;

public class ProductSearchAdapter extends ArrayAdapter<ProductDataModel> {
    private ArrayList<ProductDataModel> items;
    private ArrayList<ProductDataModel> itemsAll;
    private ArrayList<ProductDataModel> suggestions;
    private int viewResourceId;

    @SuppressWarnings("unchecked")
    public ProductSearchAdapter(Context context, int viewResourceId,
            ArrayList<ProductDataModel> items) {
        super(context, viewResourceId, items);
        this.items = items;
        this.itemsAll = (ArrayList<ProductDataModel>) items.clone();
        this.suggestions = new ArrayList<ProductDataModel>();
        this.viewResourceId = viewResourceId;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View v = convertView;
        if (v == null) {
            LayoutInflater vi = (LayoutInflater) getContext().getSystemService(
                    Context.LAYOUT_INFLATER_SERVICE);
            v = vi.inflate(viewResourceId, null);
        }
        ProductDataModel product = items.get(position);
        if (product != null) {
              TextView productLabel = (TextView)  v.findViewById(android.R.id.text1);
            if (productLabel != null) {
                productLabel.setText(product.getProductName());
            }
        }
        return v;
    }

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

    Filter nameFilter = new Filter() {
        public String convertResultToString(Object resultValue) {
            String str = ((ProductDataModel) (resultValue)).getProductName();
            return str;
        }

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            if (constraint != null) {
                suggestions.clear();
                for (ProductDataModel product : itemsAll) {
                    if (product.getProductName().toLowerCase()
                            .startsWith(constraint.toString().toLowerCase())) {
                        suggestions.add(product);
                    }
                }
                FilterResults filterResults = new FilterResults();
                filterResults.values = suggestions;
                filterResults.count = suggestions.size();
                return filterResults;
            } else {
                return new FilterResults();
            }
        }

        @Override
        protected void publishResults(CharSequence constraint,
                FilterResults results) {
            @SuppressWarnings("unchecked")
            ArrayList<ProductDataModel> filteredList = (ArrayList<ProductDataModel>) results.values;
            if (results != null && results.count > 0) {
                clear();
                for (ProductDataModel c : filteredList) {
                    add(c);
                }
                notifyDataSetChanged();
            }
        }
    };

}