无法过滤片段中的列表视图

Question

我正在研究只有一个活动和多个片段的项目。其中一个片段具有使用自定义适配器和模型填充的lisView。

我已经使用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，过滤器无法正常工作。

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; 


     } 


} 

Answer 1

在publishResults函数调用notifyDataSetChanged()，而无需创建新的适配器