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У меня есть ListView из более 1000 элементов, этот список можно фильтровать функцией поиска в моем адаптере, при нажатии на элемент он заменяет текущий фрагмент (тот, у которого есть список (A)) с деталью фрагмент (B). Когда пользователь нажимает назад или возвращается к предыдущему фрагменту (B), появляются дубликаты элементов списка.ListAdapter Search Duplicates
Любые идеи?
public class HallsInStateAdapter extends BaseAdapter implements Filterable {
private Activity activity;
private ArrayList<HashMap<String, String>> data;
private ArrayList<HashMap<String, String>> orginalData;
private static LayoutInflater inflater=null;
private Filter hallFilter;
public HallsInStateAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
setData(d);
this.orginalData = d;
}
public int getCount() {
return getData().size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
vi = inflater.inflate(R.layout.hall_list_view, null);
TextView hallName = (TextView)vi.findViewById(R.id.hallName);
TextView hallSuburb = (TextView)vi.findViewById(R.id.hallAddress);
ImageView hallFavIcon = (ImageView)vi.findViewById(R.id.hallFavouriteIcon);
HashMap<String, String> listData = new HashMap<String, String>();
listData = getData().get(position);
String address = listData.get(HallsInStateFragment.KEY_HALL_ADDRESS);
String suburb = listData.get(HallsInStateFragment.KEY_SUBURB);
String state = listData.get(HallsInStateFragment.KEY_STATE);
String objectID = listData.get(HallsInStateFragment.KEY_OBJECTID);
hallName.setText(address);
hallSuburb.setText(suburb + ", " + state);
hallFavIcon.setVisibility(View.INVISIBLE);
boolean isFavourite = false;
DatabaseHandler db = new DatabaseHandler(activity);
List<Favourite> favs = db.getAllFavourites();
for (int i = 0; i < favs.size(); i++){
if(favs.get(i).getObjectId().equals(objectID)){
isFavourite = true;
break;
}
else {
isFavourite = false;
}
}
db.close();
if (isFavourite == true){
hallFavIcon.setVisibility(View.VISIBLE);
}
return vi;
}
public android.widget.Filter getFilter() {
if (hallFilter == null)
hallFilter = new HallFilter();
return hallFilter;
}
public ArrayList<HashMap<String, String>> getData() {
return data;
}
public void setData(ArrayList<HashMap<String, String>> data) {
this.data = data;
}
private class HallFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
// We implement here the filter logic
if (constraint == null || constraint.length() == 0) {
// No filter implemented we return all the list
results.values = orginalData;
results.count = orginalData.size();
}
else {
// We perform filtering operation
final ArrayList<HashMap<String, String>> filteredLocations = new ArrayList<HashMap<String, String>>();
for (int i = 0; i < orginalData.size(); i ++) {
HashMap<String, String> halls = new HashMap<String, String>();
halls.put(HallsInStateFragment.KEY_OBJECTID, orginalData.get(i).get(HallsInStateFragment.KEY_OBJECTID));
String name = orginalData.get(i).get(HallsInStateFragment.KEY_NAME);
String prefix = orginalData.get(i).get(HallsInStateFragment.KEY_PREFIX);
String address = null;
if(prefix == null || prefix.length() == 0){
address = name;
}
else {
address = prefix + " " + name;
}
halls.put(HallsInStateFragment.KEY_NAME, name);
halls.put(HallsInStateFragment.KEY_PREFIX, prefix);
halls.put(HallsInStateFragment.KEY_HALL_ADDRESS, address);
halls.put(HallsInStateFragment.KEY_STREET, orginalData.get(i).get(HallsInStateFragment.KEY_STREET));
halls.put(HallsInStateFragment.KEY_SUBURB, orginalData.get(i).get(HallsInStateFragment.KEY_SUBURB));
halls.put(HallsInStateFragment.KEY_STATE, orginalData.get(i).get(HallsInStateFragment.KEY_STATE));
halls.put(HallsInStateFragment.KEY_POSTCODE, orginalData.get(i).get(HallsInStateFragment.KEY_POSTCODE));
halls.put(HallsInStateFragment.KEY_LATITUDE, orginalData.get(i).get(HallsInStateFragment.KEY_LATITUDE));
halls.put(HallsInStateFragment.KEY_LONGITUDE, orginalData.get(i).get(HallsInStateFragment.KEY_LONGITUDE));
halls.put(HallsInStateFragment.KEY_TYPE, orginalData.get(i).get(HallsInStateFragment.KEY_TYPE));
String query = constraint.toString().toLowerCase();
String suburb = orginalData.get(i).get(HallsInStateFragment.KEY_SUBURB);
if(name == null || name.length() == 0){
Log.e("SGL", "NULL");
}
else {
if (name.toLowerCase().contains(query) || suburb.toLowerCase().contains(query)) {
Log.i("SGL-QUERY", query);
filteredLocations.add(halls);
}
}
results.values = filteredLocations;
results.count = filteredLocations.size();
}
}
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
//Now we have to inform the adapter about the new list filtered
if (results.count == 0)
notifyDataSetInvalidated();
else {
setData((ArrayList<HashMap<String, String>>) results.values);
notifyDataSetChanged();
}
}
}
}