2
Ich habe ein Problem versucht, eine filterable (benutzerdefinierte) Listview zu implementieren. Beim Debuggen scheint die Filterung tatsächlich zu funktionieren, aber die Ergebnisse werden nie angezeigt (Listview scheint nichts zu filtern). Welches Keyword ich auch suche: Alle Elemente werden weiterhin angezeigt.Filtering ArrayAdapter Listview nicht erfrischend (Android)
-Code in meinem Fragment
ListView yourListView;
List<PokemonListItem> pokemonList;
PokemonListAdapter adapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_pokemon_list_overview,
container, false);
pDialog = new ProgressDialog(getContext());
pDialog.setMessage("Refreshing pokemon list...");
pDialog.setCancelable(false);
TAG = PokemonViewer.class.getSimpleName();
yourListView = (ListView) view.findViewById(R.id.urlListView);
refreshPokemonListItems();
EditText inputSearch = (EditText) view.findViewById(R.id.searchInput);
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
adapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {}
@Override
public void afterTextChanged(Editable arg0) {}
});
adapter = new PokemonListAdapter(getContext(), R.id.searchInput, pokemonList);
yourListView.setAdapter(adapter);
return view;
}
Mein DetailListAdapter
public class PokemonListAdapter extends ArrayAdapter<PokemonListItem> implements Filterable{
List<PokemonListItem> pokemonList;
public PokemonListAdapter(Context context, int resource, List<PokemonListItem> items) {
super(context, resource, items);
this.pokemonList = items;
}
Filter myFilter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
ArrayList<PokemonListItem> tempList=new ArrayList<>();
//constraint is the result from text you want to filter against.
//objects is your data set you will filter from
Log.v("Logger", "The constraint is now: " + constraint.toString());
if(constraint != null && pokemonList!=null) {
int length=pokemonList.size();
int i=0;
while(i<length){
PokemonListItem item=pokemonList.get(i);
//do whatever you wanna do here
//adding result set output array
boolean containsString = item.getName().toLowerCase().contains(constraint.toString().toLowerCase());
if(containsString){
tempList.add(item);
//Log.v("Logger", "Constraint: " + constraint.toString().toLowerCase() + " value: " + item.getName() + " bool: " + containsString);
}
i++;
}
//following two lines is very important
//as publish result can only take FilterResults objects
filterResults.values = tempList;
filterResults.count = tempList.size();
}
return filterResults;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence contraint, FilterResults results) {
pokemonList = (List<PokemonListItem>) results.values;
Log.v("Logger", "This is called");
if (results.count > 0) {
Log.v("Logger", "true is called");
Log.v("Logger", results.values.toString());
clear();
for (PokemonListItem item : pokemonList) {
add(item);
}
notifyDataSetChanged();
} else {
Log.v("Logger", "false is called");
notifyDataSetInvalidated();
}
}
};
@Override
public Filter getFilter() {
return myFilter;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi;
vi = LayoutInflater.from(getContext());
v = vi.inflate(R.layout.url_list_row, null);
}
PokemonListItem p = getItem(position);
if (p != null) {
TextView name = (TextView) v.findViewById(R.id.name);
if (name != null) {
name.setText(p.getName());
}
}
return v;
}
}
PokemonListItem
public class PokemonListItem {
private String id;
private String name;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
//This only works with pokemon names > 2 chars
if(name.length() > 1){
char first = Character.toUpperCase(name.charAt(0));
this.name = first + name.substring(1);
}else{
this.name = name;
}
}
@Override
public String toString(){
return id;
}