我正面临一个无法解决的问题。我创建了一个AutoCompleteTextView,它显示来自远程JSON数据的过滤建议。建议框会正常弹出并正确过滤。我有两个我无法理解的问题。
我的自定义适配器的代码:
package tz.co.fsm.fas;
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.Filterable;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class office_locations_adapter extends ArrayAdapter<office_location_data> implements Filterable {
private Context context;
private List<office_location_data> items, tempItems, suggestions;
int row_layout;
public office_locations_adapter(Context context, int row_layout, List<office_location_data> items) {
super(context, row_layout, items);
this.context = context;
this.row_layout = row_layout;
this.items = items;
tempItems = new ArrayList<>(items);
suggestions = new ArrayList<>();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(row_layout, parent, false);
}
office_location_data office = items.get(position);
if (office != null) {
TextView lbloffice = view.findViewById(R.id.rowtxtOfficeLocation);
if (lbloffice != null) {
lbloffice.setText(office.getOffice_location());
}
}
return view;
}
// This is important as it returns the count of the new arraylist when we filter it.
@Override
public int getCount() {
return items.size();
}
// Method to return the filter
@Override
public Filter getFilter() {
return performFiletring;
}
// Create a new filter. Here we perform the filtering results and use this in the getFilter() method
Filter performFiletring = new Filter() {
@Override
public CharSequence convertResultToString(Object resultValue) {
String str = ((office_location_data) resultValue).getOffice_location();
return str;
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
// We have some text to search
if (constraint != null) {
// CLear the suggestions array
suggestions.clear();
// Find the rows which match and add them to suggestions
for (office_location_data offices : tempItems) {
if (offices.getOffice_location().toLowerCase().contains(constraint.toString().toLowerCase())) {
suggestions.add(offices);
}
}
// Pass the filter results to the next step publish results
FilterResults filterResults = new FilterResults();
filterResults.values = suggestions;
filterResults.count = suggestions.size();
// System.out.println(filterResults.count);
return filterResults;
} else {
return new FilterResults();
}
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
items = (List) results.values;
if (results.count > 0) {
//suggestions = (office_location_data) results.values;
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
};
}
答案 0 :(得分:0)
发现了问题。 publishResults()
方法是错误的:
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
List<office_location_data> items = (ArrayList<office_location_data>) results.values;
if (results != null && results.count > 0) {
clear();
for (office_location_data offices : suggestions) {
add(offices);
notifyDataSetChanged();
}
} else {
notifyDataSetInvalidated();
}
}
这就是我的方法。