转--Android实现ListView过滤功能，继承于BaseAdapter，非ArrayAdapter。
其实实现ListView过滤功能最方便的便是使用ArrayAdapter，里面自带的getFilter()方法能很方便的实现此功能，但是在实际的开发中，一般都是继承于BaseAdapter。还有一种是利用控件AutoComplete，这种方式只是在输入框的下方重新显示一个列表，显然，很多时候这两种方式也满足不了我们的要求。
在Activity中定义一个类，让它实现TextWatcher接口，然后再onTextChanged方法中去过滤。然后常见相应的Pattern和match,来判断传入的参数时候符合列表中的数据，符合就加入一个新的列表中。
首先贴出实现的效果图
下面贴出主要实现代码
1 package com.example.demo;
2
3 import java.util.ArrayList;
4 import java.util.List;
5 import java.util.regex.Matcher;
6 import java.util.regex.Pattern;
7 import android.os.Bundle;
8 import android.app.Activity;
9 import android.text.Editable;
10 import android.text.TextWatcher;
11 import android.view.Menu;
12 import android.widget.EditText;
13 import android.widget.ListView;
14
15 public class MainActivity extends Activity {
16
17 List<People> people = new ArrayList<People>() ;
18 EditText editinput;
19 ListView listview;
20 Adapter adapter;
21
22
23 @Override
24 protected void onCreate(Bundle savedInstanceState) {
25 super.onCreate(savedInstanceState);
26 setContentView(R.layout.activity_main);
27 editinput = (EditText)findViewById(R.id.edit);
28 listview = (ListView)findViewById(R.id.ydlist);
29 initdata();
30 adapter = new Adapter(getApplicationContext(), people);
31 listview.setAdapter(adapter);
32 editinput.addTextChangedListener(new watcher());
33 }
34
35 void initdata(){
36
37 people.add(new People("张三","1374456"));
38 people.add(new People("张三小子", "12444455"));
39 people.add(new People("李一", "1345555"));
40 people.add(new People("王一", "1355555"));
41 people.add(new People("王二", "1365555"));
42 people.add(new People("李三", "13565555"));
43 people.add(new People("李一", "123555"));
44 }
45
46 class watcher implements TextWatcher{
47
48 @Override
49 public void afterTextChanged(Editable s) {
50 // TODO Auto-generated method stub
51
52 }
53
54 @Override
55 public void beforeTextChanged(CharSequence s, int start, int count,
56 int after) {
57 // TODO Auto-generated method stub
58
59 }
60
61 @Override
62 public void onTextChanged(CharSequence s, int start, int before,
63 int count) {
64 // TODO Auto-generated method stub
65 String aa = s.toString();
66 Pattern p = Pattern.compile(aa);
67 List<People> we = new ArrayList<People>();
68 for(int i=0;i<people.size();i++){
69 People pp = people.get(i);
70 Matcher matcher = p.matcher(pp.getName()+pp.getPhome());
71 if(matcher.find()){
72 we.add(pp);
73 }
74 }
75 adapter = new Adapter(getApplicationContext(), we);
76 listview.setAdapter(adapter);
77 }
78
79 }
80
81 @Override
82 public boolean onCreateOptionsMenu(Menu menu) {
83 // Inflate the menu; this adds items to the action bar if it is present.
84 getMenuInflater().inflate(R.menu.activity_main, menu);
85 return true;
86 }
87
88 }
自定义Adapter
1 package com.example.demo;
2
3 import java.util.ArrayList;
4 import java.util.List;
5 import android.content.Context;
6 import android.view.LayoutInflater;
7 import android.view.View;
8 import android.view.ViewGroup;
9 import android.widget.BaseAdapter;
10 import android.widget.TextView;
11
12 public class Adapter extends BaseAdapter {
13 private List<People> people = new ArrayList<People>();
14 Context ct;
15 private LayoutInflater inflater;
16 public Adapter(Context ct,List<People> people) {
17 // TODO Auto-generated constructor stub
18 this.people = people;
19 this.ct = ct;
20 inflater = (LayoutInflater) ct.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
21 }
22
23 @Override
24 public int getCount() {
25 // TODO Auto-generated method stub
26 return people.size();
27 }
28
29 @Override
30 public Object getItem(int position) {
31 // TODO Auto-generated method stub
32 return people.get(position);
33 }
34
35 @Override
36 public long getItemId(int position) {
37 // TODO Auto-generated method stub
38 return position;
39 }
40
41 @Override
42 public View getView(int position, View convertView, ViewGroup parent) {
43 // TODO Auto-generated method stub
44 People p = people.get(position);
45 if(convertView==null){
46 convertView = inflater.inflate(R.layout.yd_item, null);
47 }
48 TextView tv1=(TextView)convertView.findViewById(R.id.ydtext1);
49 TextView tv2=(TextView)convertView.findViewById(R.id.ydtext2);
50 tv1.setText(p.getName());
51 tv2.setText(p.getPhome());
52 return convertView;
53 }
54
55
56
57 }
实体类
1 package com.example.demo;
2
3 public class People {
4 private String Name ;
5 private String Phome;
6
7
8
9 public String getName() {
10 return Name;
11 }
12
13
14
15 public void setName(String name) {
16 Name = name;
17 }
18
19
20
21 public String getPhome() {
22 return Phome;
23 }
24
25
26
27 public void setPhome(String phome) {
28 Phome = phome;
29 }
30
31
32
33 public People(String name,String phone){
34 super();
35 this.Name = name;
36 this.Phome = phone;
37 }
38 }
