android - addTextChangedListener 与 listview 与潜台词

Question

我想在列表中搜索并再次在列表中显示结果所以我使用了 addtextchangelistener，但找不到一种方法让它与带有子文本的 ListView 一起工作

这是我的代码:

  package com.android;

    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.io.LineNumberReader;
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    import java.util.StringTokenizer;

    import android.app.ListActivity;
    import android.os.Bundle;
    import android.text.Editable;
    import android.text.TextWatcher;
    import android.util.Log;
    import android.view.View;
    import android.widget.ArrayAdapter;
    import android.widget.EditText;
    import android.widget.ListView;
    import android.widget.SimpleAdapter;
    import android.widget.TextView;

    public class MyListDemoActivity extends ListActivity {
        /** Called when the activity is first created. */
        TextView tv;



        //** List<String> content;

        EditText actv;
        List<String> arr_sort;
        //** ArrayAdapter<String> adapter;
        SimpleAdapter simpleadapter;
        ListView lv;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);

            String line = " ";

            LineNumberReader linenoreader = null;
            StringTokenizer stringtokanixer = null;
        //**    content = new ArrayList<String>();
            List<Map<String,String>> data= new ArrayList<Map<String,String>>();

            lv = (ListView) findViewById(android.R.id.list);

            try {

                InputStream istream = getResources().openRawResource(R.raw.grelist);
                InputStreamReader streamreader = new InputStreamReader(istream);

                linenoreader = new LineNumberReader(streamreader);
                linenoreader.mark(15);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }// try catch ends here

            Log.v("getting", "working");

            for(int i=0;i<8;i++)
            {
                Map<String,String> datum= new HashMap<String,String>(2);
                try {
                    line = linenoreader.readLine();
                    Log.v("item",line);
                } catch (IOException e) {

                    e.printStackTrace();
                }
                Log.v("getting", line);
                stringtokanixer = new StringTokenizer(line);

                String st = stringtokanixer.nextToken();
                String meaning="";
                while (stringtokanixer.hasMoreTokens()) {
                    meaning +=" " +stringtokanixer.nextToken();

                }// for ends

                // map is used to add word and meaning 
                datum.put("word",st);
                datum.put("meaning",meaning);
                data.add(datum);

                //List<String> is usedto add
        //**        content.add(st);
            }


            simpleadapter = new SimpleAdapter(this, data, android.R.layout.simple_list_item_2, new String[]{"word","meaning"}, new int[]{android.R.id.text1,android.R.id.text2});

            // setListAdapter(adapter);

            lv.setAdapter(simpleadapter);
            tv = (TextView) findViewById(R.id.textView1);

            actv = (EditText) findViewById(R.id.editText1);


            /*  
                actv.addTextChangedListener(new TextWatcher() {
                int len = 0;


                @Override
                public void onTextChanged(CharSequence s, int start, int before,
                        int count) {
                        arr_sort = new ArrayList<String>();

                        len = actv.getText().length();

                        for (int i = 0; i < content.size(); i++) {
                            if (len <= content.get(i).length()) {
                                if (actv.getText()
                                        .toString()
                                        .trim()
                                        .equalsIgnoreCase(
                                                (String) content.get(i).subSequence(0,
                                                        len))) {

                                    arr_sort.add(content.get(i));
                                    Log.v("infor loop afterTextChanged", s.toString());
                                }

                            }

                        }

            //          adapter.notifyDataSetChanged();

                        adapter = new ArrayAdapter<String>(MyListDemoActivity.this,
                            android.R.layout.simple_list_item_1, arr_sort);
                        setListAdapter(adapter);
                }

                @Override
                public void beforeTextChanged(CharSequence s, int start, int count,
                        int after) {
                        Log.v("beforetextchange","hello here");
                }

                @Override
                public void afterTextChanged(Editable s) {
                    Log.v("aftertextchange","hello here");

                }
            }); // text watcher class ends here
    */


        }// on create ends here

        public void onListItemClick(ListView ls, View v, int position, long id) {
            //tv.setText(content.get(position));

            // tv.setText(content[position]) // in case of string

        }// endsd here onListItemClick(
    }

Answer 1

我已经回答了两个 StackOverflow 问题本身，您可以回答，

首先是使用 getFilter() android 提供的过滤功能，使用适配器类的 Filterable 接口(interface)。你可以从here查到.

其次是使用外部 jar Lambdaj这是从列表中过滤大量数据的最佳和有效方法。您也可以从 here 中查看.