如何使用扩展ArrayAdapter的自定义适配器实现getFilter（）

Question

真的很麻烦。我只希望能够按文本过滤。这是带有listView的活动：

import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;
import android.widget.ExpandableListView;
import android.widget.SearchView;
import android.widget.Toast;

import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;

import java.util.ArrayList;
import java.util.HashMap;

public class HomeOwnerActivity extends AppCompatActivity {

    private ExpandableListView listView;
    private HomeOwnerAdapter serviceAdapter;
    private FullService service;
    private ArrayList<FullService> services;
    private ArrayList<String> names = new ArrayList<>();
    private HashMap<FullService,ArrayList<String>> listHashMap;
    private DatabaseReference databaseUsers;
    private HomeOwnerAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home_owner);

        EditText theFilter = (EditText) findViewById(R.id.search_box);

        databaseUsers = FirebaseDatabase.getInstance().getReference("services");


        listView = (ExpandableListView)findViewById(R.id.allList);
        services = new ArrayList<>();
        listHashMap = new HashMap<>();

        serviceAdapter = new HomeOwnerAdapter(HomeOwnerActivity.this, services, listHashMap);
        listView.setAdapter(serviceAdapter);



        theFilter.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

                (HomeOwnerActivity.this).adapter.getFilter().filter();

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

    }

    protected void onStart(){
        super.onStart();
        databaseUsers.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                for (DataSnapshot postSnapshot: dataSnapshot.getChildren()){
                    FullService service = postSnapshot.getValue(FullService.class);
                    services.add(service);
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });

    }
}

GetFilter（）当然由于自定义arrayadapter而无法工作。 这是我的适配器类，我添加了Filterable实现，但是我不确定从这里开始。

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Filterable;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;;

public class ServiceAdapter extends ArrayAdapter<Service> implements Filterable {

    private final Context context;
    private final ArrayList<Service> services;

    public ServiceAdapter(Context context, ArrayList<Service> values) {
        super(context, R.layout.list_item_layout, values);
        this.context = context;
        this.services = values;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        //Getting Recipe
        Service curService = services.get(position);

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View rowView = inflater.inflate(R.layout.list_item_layout, parent, false);
        TextView serviceName = (TextView) rowView.findViewById(R.id.itemName);
        TextView hourlyRate = (TextView) rowView.findViewById(R.id.itemDescription);

        //Placing content into recipe List Item
        serviceName.setText(curService.getService());
        hourlyRate.setText((curService.getRate()));

        return rowView;
    }
    @Override
    public void add(Service newService) {
        services.add(newService);
        notifyDataSetChanged();
    }

    public void delete(Service currentService) {
        services.remove(currentService);
        notifyDataSetChanged();
    }
}

这是我的布局XML：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <EditText
        android:id="@+id/search_box"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <ExpandableListView
        android:id="@+id/allList"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:drawSelectorOnTop="false"
        />
</LinearLayout>

我读过的很多文章都使用BaseAdapter，目前我不能切换到那个。有什么方法可以实现getFilter（）并使它正常工作吗？