Мой фильтр настраиваемых списков не работает

Question

Я пробовал несколько кодов и много решений от stackOverflow, но ни один из них не работал для меня :(Я не знаю, почему это произошло. Я разместил еще один question, но мне не повезло, что перед кем-то ответить на это помечено как дубликат только зависит от моего описания. Я ищу отличное решение.

Вот мой код

PhoneListAdapter.java

import java.util.ArrayList; 
import android.app.Activity; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.Filter; 
import android.widget.Filterable; 
import android.widget.TextView; 
import com.rupomkhondaker.sonalibank.R; 
import com.rupomkhondaker.sonalibank.model.ContactItem; 


public class PhoneListAdapter extends BaseAdapter implements Filterable{ 
    private ArrayList<ContactItem> listData; 
    private ArrayList<ContactItem> origData; 
    private LayoutInflater layoutInflater; 
    private ValueFilter valueFilter; 



    public PhoneListAdapter(Activity context, ArrayList<ContactItem> listData) { 
     this.listData = listData; 
     layoutInflater = LayoutInflater.from(context); 
     origData = new ArrayList<>(listData); 
    } 

    @Override 
    public int getCount() { 
     return listData.size(); 
    } 

    @Override 
    public Object getItem(int position) { 
     return listData.get(position); 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    public View getView(int position, View convertView, ViewGroup parent) { 
     ViewHolder holder; 
     if (convertView == null) { 
      convertView = layoutInflater.inflate(R.layout.list_white_text, null); 
      holder = new ViewHolder(); 
      holder.nameView = (TextView) convertView.findViewById(R.id.name_title); 
      holder.phoneView = (TextView) convertView.findViewById(R.id.list_sub_phone); 
      holder.mobileView = (TextView) convertView.findViewById(R.id.list_sub_mobile); 
      holder.emailView = (TextView) convertView.findViewById(R.id.list_sub_email); 
      convertView.setTag(holder); 

     } else { 
      holder = (ViewHolder) convertView.getTag(); 
     } 

     ContactItem contactItem = listData.get(position); 
     holder.nameView.setText(contactItem.getName()); 
     holder.phoneView.setText("Ph: " + contactItem.getPhone()); 
     holder.mobileView.setText("Mob: " + contactItem.getMobile()); 
     holder.emailView.setText("Email: " + contactItem.getEmail()); 



     return convertView; 
    } 

    static class ViewHolder { 
     TextView nameView; 
     TextView phoneView; 
     TextView mobileView; 
     TextView emailView; 
     } 

    // Filter Class 
    public Filter getFilter() { 
     if(valueFilter==null) { 
      valueFilter=new ValueFilter(); 
     } 
     return valueFilter; 
    } 
    private class ValueFilter extends Filter { 

     //Invoked in a worker thread to filter the data according to the constraint. 

     @Override 
     protected FilterResults performFiltering(CharSequence constraint) { 

      FilterResults results = new FilterResults(); 
      if (constraint != null && constraint.length() > 0) { 
       ArrayList<ContactItem> filterList = new ArrayList<ContactItem>(); 
       for (int i = 0; i < origData.size(); i++) { 
        final ContactItem contactItem = origData.get(i); 
        if (contactItem.getName().toString().toLowerCase().contains(constraint)) { 
         filterList.add(contactItem); 
        } 
       } 
       results.count = filterList.size(); 
       results.values = filterList; 
      } else { 
       results.count = origData.size(); 
       results.values = origData; 
      } 
      return results; 
     } 

     //Invoked in the UI thread to publish the filtering results in the user interface. 
    @Override 
    @SuppressWarnings("unchecked") 
     protected void publishResults(CharSequence constraint,FilterResults results) { 
     origData = (ArrayList<ContactItem>) results.values; 
      notifyDataSetChanged(); 
     } 
    } 
} 

ContactItem.java

import java.io.Serializable; 

public class ContactItem implements Serializable { 

    private String name; 
    private String phone; 
    private String mobile; 
    private String email; 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public String getPhone() { 
     return phone; 
    } 

    public void setPhone(String phone) { 
     this.phone = phone; 
    } 

    public String getMobile() { 
     return mobile; 
    } 

    public void setMobile(String mobile) { 
     this.mobile = mobile; 
    } 

    public String getEmail() { 
     return email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 

    @Override 
    public String toString() { 
     return "[ Name=" + name + ", Phone=" + phone + " , Mobile=" + mobile + ", Email=" + email + "]"; 
    } 
} 

GMOFragment.java

import android.app.Fragment; 
import android.content.Intent; 
import android.database.Cursor; 
import android.os.Bundle; 
import android.text.Editable; 
import android.text.TextWatcher; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.EditText; 
import android.widget.ListAdapter; 
import android.widget.ListView; 
import com.rupomkhondaker.sonalibank.adapter.PhoneListAdapter; 
import com.rupomkhondaker.sonalibank.model.ContactItem; 
import java.util.ArrayList; 


public class GMOFragment extends Fragment { 
    public GMOFragment(){} 

    private static String DB_NAME ="SBLdata.db";// Database name 
    private PhoneListAdapter mCustomAdapter; 



    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 

     View rootView = inflater.inflate(R.layout.fragment_contact, container, false); 

     final ListView listView = (ListView) rootView.findViewById(R.id.gmolistView); 
     EditText inputSearch =(EditText) rootView.findViewById(R.id.inputSearch); 

     final ArrayList<ContactItem> listData = getListData(); 

     //listView.setAdapter(new PhoneListAdapter(getActivity(), listData)); 
     listView.setAdapter(mCustomAdapter = new PhoneListAdapter(getActivity(), listData)); 

     listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> a, View v, int position, long id) { 
       ContactItem contactData = (ContactItem) listView.getItemAtPosition(position); 
       Intent intent = new Intent(getActivity(), ContactDetail.class); 
       intent.putExtra("DATA_KEY", contactData); 
       startActivity(intent); 
      } 
     }); 


     inputSearch.addTextChangedListener(new TextWatcher() { 
      public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) { 
       // When user changed the Text 
       mCustomAdapter.getFilter().filter(cs.toString()); 
       } 

      public void beforeTextChanged(CharSequence cs, int arg1, int arg2, int arg3) { 
      } 

      public void afterTextChanged(Editable cs) {  
      } 
     }); 
     //search 


    //Changing Actionbar Title 
     getActivity().setTitle("GM Office Contact List"); 
     return rootView; 
    } 

    private ArrayList<ContactItem> getListData() { 
     ArrayList<ContactItem> listMockData = new ArrayList<ContactItem>(); 
     DataBaseHelper empClick = new DataBaseHelper(getActivity(), DB_NAME); 
     Cursor cursor = empClick.getDetailsofGMO(); 

     ContactItem newsData = null; 

     while (cursor.moveToNext()) { 
      newsData = new ContactItem(); 
      newsData.setName(cursor.getString(0)); 
      newsData.setPhone(cursor.getString(1)); 
      newsData.setMobile(cursor.getString(2)); 
      newsData.setEmail(cursor.getString(3)); 
      listMockData.add(newsData); 
     } 
     return listMockData; 
    } 

} 

Вход Cat

at android.os.HandlerThread.run(HandlerThread.java:60) 
10-11 19:31:21.388 1400-1415/? W/Filter﹕ An exception occured during performFiltering()! 
    java.lang.NullPointerException 
      at com.rupomkhondaker.sonalibank.adapter.PhoneListAdapter$ValueFilter.performFiltering(PhoneListAdapter.java:97) 
      at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.os.HandlerThread.run(HandlerThread.java:60) 
10-11 19:31:21.548 1400-1415/? W/Filter﹕ An exception occured during performFiltering()! 
    java.lang.NullPointerException 
      at com.rupomkhondaker.sonalibank.adapter.PhoneListAdapter$ValueFilter.performFiltering(PhoneListAdapter.java:97) 
      at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.os.HandlerThread.run(HandlerThread.java:60) 
10-11 19:31:21.929 1400-1415/? W/Filter﹕ An exception occured during performFiltering()! 
    java.lang.NullPointerException 
      at com.rupomkhondaker.sonalibank.adapter.PhoneListAdapter$ValueFilter.performFiltering(PhoneListAdapter.java:97) 
      at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.os.HandlerThread.run(HandlerThread.java:60) 
10-11 19:31:22.108 1400-1415/? W/Filter﹕ An exception occured during performFiltering()! 
    java.lang.NullPointerException 
      at com.rupomkhondaker.sonalibank.adapter.PhoneListAdapter$ValueFilter.performFiltering(PhoneListAdapter.java:97) 
      at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.os.HandlerThread.run(HandlerThread.java:60) 
10-11 19:31:37.029 1400-1400/? W/EGL_emulation﹕ eglSurfaceAttrib not implemented 
10-11 19:31:37.578 1400-1416/? W/Filter﹕ An exception occured during performFiltering()! 
    java.lang.NullPointerException 
      at com.rupomkhondaker.sonalibank.adapter.PhoneListAdapter$ValueFilter.performFiltering(PhoneListAdapter.java:97) 
      at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:137) 

Answer 1

Соответственно коду вы вывесили here

Вы PhoneListAdapter не реализует Filterable. Изменение

public class PhoneListAdapter extends BaseAdapter { 

в

public class PhoneListAdapter extends BaseAdapter implements Filterable{ 

в вашем фрагменте вы никогда не назначать mCustomAdapter. Его значение всегда равно нулю.

Изменить

listView.setAdapter(new PhoneListAdapter(getActivity(), listData)); 

в

listView.setAdapter(mCustomAdapter = new PhoneListAdapter(getActivity(), listData)); 

EDIT

@Override 
    protected FilterResults performFiltering(CharSequence constraint) { 

     FilterResults results = new FilterResults(); 
     if (constraint != null && constraint.length() > 0) { 
      ArrayList<ContactItem> filterList = new ArrayList<ContactItem>(); 
      for (int i = 0; i < listData.size(); i++) { 
       final ContactItem contactItem = listData.get(i); 
       if (constraint.contains(contactItem.getName())) { 
        filterList.add(contactItem); 
       } 
      } 
      results.count = filterList.size(); 
      results.values = filterList; 
     } else { 
      results.count = listData.size(); 
      results.values = listData; 
     } 
     return results; 
    } 

вы, вероятно, хотите, чтобы сохранить копию listData вернуться в поисковом

edit2 :

@SuppressWarnings("unchecked") 
@Override 
protected void publishResults(CharSequence constraint,FilterResults results) { 
    listData = (ArrayList<ContactItem>) results.values; 
    notifyDataSetChanged(); 

} 

EDIT3

public class PhoneListAdapter extends BaseAdapter implements Filterable{ 
private ArrayList<ContactItem> listData; 
private ArrayList<ContactItem> origData; 
private LayoutInflater layoutInflater; 
private ValueFilter valueFilter; 
private Filter mFilter; 


public PhoneListAdapter(Activity context, ArrayList<ContactItem> listData) { 
    this.listData = listData; 
    layoutInflater = LayoutInflater.from(context); 
    origData = new ArrayList<>(listData); 
} 

В performFiltering использовании origData, вместо listData. Этого должно быть достаточно, чтобы вы могли восстановить свой набор данных.

Answer 2

Глядя на ваш код здесь How to add filter on my custom list adapter in android app

Вы объявляете адаптер:

private PhoneListAdapter mCustomAdapter; 

А затем вызвать его, прежде чем вы инициализирован его.

@Override 
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { 
    mCustomAdapter.getFilter().filter(arg0); 
} 

Таким образом, вы получаете исключение nullpointer в своем onTextChanged.