我正在开发一个只有一个活动和多个片段的项目。其中一个片段有一个使用自定义适配器和模型填充的lisView。
我使用了searchview（工具栏菜单）来获取查询并过滤listview中的内容。
由于某种原因，过滤器无效。
public class CustomAdapater extends BaseAdapter implements Filterable {
private final String taglaunch = "TAGLAUNCH";
ArrayList<SingleRow> list;
Context context;
String[] menuTitles;
ArrayList<SingleRow>filteredData;
Filter filter;
CustomAdapater(Context context){
this.context=context;
list = new ArrayList<SingleRow>();
Resources resources = context.getResources();
menuTitles = resources.getStringArray(R.array.Banks);
int[] menuIcons = {R.mipmap.ic_allahabadbank_logo,R.mipmap.ic_andhrabank_logo,R.mipmap.ic_axisbank_logo,R.mipmap.ic_bankofbaroda_logo,
R.mipmap.ic_bankofindia_logo,R.mipmap.ic_bankofmaharashtra_logo, R.mipmap.ic_bharatiyamahilabank_logo,R.mipmap.ic_canarabank_logo
,R.mipmap.ic_capitallocalareabank_logo,R.mipmap.ic_centralbankofindia_logo};
for(int i = 0; i<menuIcons.length; i++){
list.add(new SingleRow(menuTitles[i],menuIcons[i]));
}
filteredData = new ArrayList<SingleRow>();
filteredData.addAll(list);
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Log.d(taglaunch,"Am i called post filter");
View row = convertView;
ViewHolder ViewHolder = null;
if(row==null){
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.singlerow,parent,false);
ViewHolder = new ViewHolder(row);
row.setTag(ViewHolder);
}
else{
ViewHolder = (ViewHolder) row.getTag();
}
SingleRow temp = list.get(position);
ViewHolder.BankHeaderTitle.setText(temp.menu);
ViewHolder.linkNotification.setText( context.getResources().getString(R.string.Click_here));
ViewHolder.bankLogo.setImageResource(temp.menuIcons);
return row;
}
@Override
public Filter getFilter() {
if(filter==null){
filter = new MyFilter();
}
return filter;
}
class SingleRow{
String menu;
int menuIcons;
SingleRow(String menu,int menuIcons){
this.menu = menu;
this.menuIcons= menuIcons;
}
}
class ViewHolder{
TextView BankHeaderTitle;
TextView linkNotification;
ImageView bankLogo;
ViewHolder(View v){
BankHeaderTitle = (TextView) v.findViewById(R.id.BankHeaderTitle);
linkNotification = (TextView) v.findViewById(R.id.linkNotification);
bankLogo = (ImageView) v.findViewById(R.id.bankLogo);
}
}
public class MyFilter extends Filter{
@Override
protected FilterResults performFiltering(CharSequence constraint) {
//creating filter results object which needs to returned.
FilterResults results = new FilterResults();
ArrayList<SingleRow> filterResults = new ArrayList<SingleRow>();
String searchResult;
if(constraint!=null&&constraint.length()>0)
searchResult = constraint.toString().toLowerCase();
else{
results.count = filteredData.size();
results.values= filteredData;
return results;
}
int count = filteredData.size();
String filterableString;
for (int i = 0; i < count; i++) {
filterableString = filteredData.get(i).menu;
if (filterableString.toLowerCase().contains(searchResult)) {
Log.d(taglaunch,"adding " +filterableString);
SingleRow singleRow = new SingleRow(filteredData.get(i).menu,filteredData.get(i).menuIcons);
filterResults.add(singleRow);
}
}
results.count = filterResults.size();
results.values= filterResults;
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results.count == 0)
notifyDataSetInvalidated();
else {
list = (ArrayList<SingleRow>) results.values;
Log.d(taglaunch, "Publishing " + list.get(0).menu);
new CustomAdapater(context).notifyDataSetChanged();
}
}
}
}
我的片段是
public class Fd_Fragment extends Fragment implements SearchView.OnQueryTextListener {
private final String taglaunch = "TAGLAUNCH";
ListView listview;
SearchView searchView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
// setRetainInstance(true); //Will ignore onDestroy Method (Nested Fragments no need this if parent have it)
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_search) {
Log.d(taglaunch, "Search Icon Clicked from fragment");
return false;
}
return super.onOptionsItemSelected(item);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d(taglaunch, "FD Fragment Created");
return inflater.inflate(R.layout.fd_fragment_layout, container, false);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
listview = (ListView) getActivity().findViewById(R.id.banksListView);
listview.setOnItemClickListener(new SettingListeners());
listview.setAdapter(new CustomAdapater(getActivity()));
if (savedInstanceState != null) {
((Appdrawer) getActivity()).setNavIcon();
}
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
searchView.setOnQueryTextListener(this);
}
public void onResume() {
super.onResume();
String temp;
String interestType = getArguments().getString(((Appdrawer)getActivity()).interestType);
if(interestType.equals(((Appdrawer) getActivity()).fd)) {
temp = getString(R.string.fdLabel);
}
else{
temp = getString(R.string.rdLabel);
}
((Appdrawer) getActivity())
.setActionBarTitle(temp);
Toolbar mToolbar = (Toolbar) getActivity().findViewById(R.id.toolbar);
mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
((Appdrawer) getActivity()).onSupportNavigateUp();
}
});
}
public class SettingListeners implements AdapterView.OnItemClickListener{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Fragment fragment = new WebViewClass();
String selected = ((TextView) view.findViewById(R.id.BankHeaderTitle)).getText().toString();
Log.d(taglaunch,"List item clicked");
Bundle args = new Bundle();
args.putString(((Appdrawer) getActivity()).BankName, selected);
args.putString(((Appdrawer) getActivity()).interestType, getArguments().getString(((Appdrawer) getActivity()).interestType));
fragment.setArguments(args);
Log.d(taglaunch,"clicked item"+selected);
getFragmentManager().beginTransaction().replace(R.id.app_bar, fragment).addToBackStack(null).commit();
}
}
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
CustomAdapater adapter = new CustomAdapater(getActivity());
if (adapter != null && newText != null) {
adapter.getFilter().filter(newText);
return true;
}
return false;
}
}
答案 0 :(得分：1)
在publishResults函数调用notifyDataSetChanged()中，无需创建新的适配器