Google Academy Android Google Maps自动完成示例

Question

import android.widget.Filter.FilterResults; 

@Override

public Filter getFilter() {
        Filter filter = new Filter() {

@Override
             protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults filterResults = new FilterResults();
                if (constraint != null) {
                    // Retrieve the autocomplete results.
                    resultList = autocomplete(constraint.toString());

                    // Assign the data to the FilterResults
                    filterResults.values = resultList;
                    filterResults.count = resultList.size();
                }
                return filterResults;
            }


  protected void publishResults(CharSequence constraint, FilterResults results) {
                if (results != null && results.count > 0) {
                    notifyDataSetChanged();

导入给了我一个错误“类型Android.widget.Filter.FilterResults不可见”，但是在后面的代码中，我得到了一些不同的错误，比如（1）Filter“返回类型与ArrayAdapter.getFilter（）不兼容”。有什么想法吗？？？

Answer 1

import android.view.LayoutInflater.Filter;

import android.widget.Filter;