过滤Android ListView

Question

我有一个列表视图，每行包含项目和子项目。我有一个EditText字段，我想用它来键入文本时筛选列表。我希望能够搜索项目和子项目。有人能指出我如何做到这一点的正确方向吗？

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

import com.google.android.gms.maps.model.Marker;

public class FarmMarketList extends RSFM
{
    ListView marketList;
    ArrayList<String> titles = new ArrayList<String>();
    ArrayList<String> addresses = new ArrayList<String>();
    ArrayAdapter<String> adapter;
    EditText listSearch;

    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.farm_market_list);
        marketList = (ListView) findViewById(R.id.listFarmMarkets);
        listSearch = (EditText) findViewById(R.id.listSearch);

        for(Marker m : list)
        {
            titles.add(m.getTitle());
            addresses.add(m.getSnippet());
        }

        List<Map<String, String>> data = new ArrayList<Map<String, String>>();

        for(int i = 0; i < titles.size(); i++)
        {
            Map<String, String> datum = new HashMap<String, String>(2);
            datum.put("title", titles.get(i));
            datum.put("subtitle", addresses.get(i));
            data.add(datum);
        }

        SimpleAdapter simpleAdapter = new SimpleAdapter(FarmMarketList.this, data, android.R.layout.simple_list_item_2, new String[] {"title", "subtitle"}, new int[] {android.R.id.text1, android.R.id.text2});
        marketList.setAdapter(simpleAdapter);

        // Row Selection
        marketList.setOnItemClickListener(new OnItemClickListener()
        {
            @Override
            public void onItemClick(AdapterView<?> parent, View v, int position, long id)
            {
                TextView text1 = (TextView) v.findViewById(android.R.id.text1);
                TextView text2 = (TextView) v.findViewById(android.R.id.text2);

                Intent i = new Intent(FarmMarketList.this, FarmMarketDetails.class);
                i.putExtra("selectedTitle", text1.getText());
                i.putExtra("selectedAddress", text2.getText());
                startActivity(i);
            }
        });
    }
}

编辑：我添加了此代码，但是当我开始在EditText字段中输入时，它会导致应用程序崩溃。

listSearch.addTextChangedListener(new TextWatcher()
        {
            @Override
            public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3)
            {
                FarmMarketList.this.adapter.getFilter().filter(cs);
            }

            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3)
            {
                // TODO Auto-generated method stub
            }

            @Override
            public void afterTextChanged(Editable arg0)
            {
                // TODO Auto-generated method stub
            }
        });

Answer 1

我通过添加

来实现它

marketList.setTextFilterEnabled(true);

并将onTextChange（）方法中的行更改为

FarmMarketList.this.simpleAdapter.getFilter().filter(cs);