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

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package com.example.demo;       import java.util.ArrayList; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; import android.os.Bundle; import android.app.Activity; import android.text.Editable; import android.text.TextWatcher; import android.view.Menu; import android.widget.EditText; import android.widget.ListView;       public class MainActivity extends Activity {               List<People> people = new ArrayList<People>() ;     EditText editinput;     ListView listview;     Adapter adapter;                     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         editinput = (EditText)findViewById(R.id.edit);         listview = (ListView)findViewById(R.id.ydlist);         initdata();         adapter = new Adapter(getApplicationContext(), people);         listview.setAdapter(adapter);         editinput.addTextChangedListener(new watcher());     }                void initdata(){                       people.add(new People("张三","1374456"));         people.add(new People("张三小子", "12444455"));         people.add(new People("李一", "1345555"));         people.add(new People("王一", "1355555"));         people.add(new People("王二", "1365555"));         people.add(new People("李三", "13565555"));         people.add(new People("李一", "123555"));      }               class watcher implements TextWatcher{               @Override         public void afterTextChanged(Editable s) {             // TODO Auto-generated method stub                           }               @Override         public void beforeTextChanged(CharSequence s, int start, int count,                 int after) {             // TODO Auto-generated method stub                              }               @Override         public void onTextChanged(CharSequence s, int start, int before,                 int count) {             // TODO Auto-generated method stub             String aa = s.toString();             Pattern p = Pattern.compile(aa);             List<People> we = new ArrayList<People>();                    for(int i=0;i<people.size();i++){                 People pp = people.get(i);             Matcher matcher = p.matcher(pp.getName()+pp.getPhome());             if(matcher.find()){                 we.add(pp);             }             }             adapter = new Adapter(getApplicationContext(), we);             listview.setAdapter(adapter);         }                   }               @Override     public boolean onCreateOptionsMenu(Menu menu) {         // Inflate the menu; this adds items to the action bar if it is present.         getMenuInflater().inflate(R.menu.activity_main, menu);         return true;     }       }

自定义Adapter

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package com.example.demo;       import java.util.ArrayList; import java.util.List; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.TextView;       public class Adapter extends BaseAdapter  {     private List<People> people = new ArrayList<People>();     Context ct;     private LayoutInflater inflater;     public Adapter(Context ct,List<People> people) {         // TODO Auto-generated constructor stub         this.people = people;         this.ct = ct;         inflater = (LayoutInflater) ct.getSystemService(Context.LAYOUT_INFLATER_SERVICE);     }           @Override     public int getCount() {         // TODO Auto-generated method stub         return people.size();     }           @Override     public Object getItem(int position) {         // TODO Auto-generated method stub         return people.get(position);     }           @Override     public long getItemId(int position) {         // TODO Auto-generated method stub         return position;     }           @Override     public View getView(int position, View convertView, ViewGroup parent) {         // TODO Auto-generated method stub         People p = people.get(position);         if(convertView==null){             convertView = inflater.inflate(R.layout.yd_item, null);         }         TextView tv1=(TextView)convertView.findViewById(R.id.ydtext1);         TextView tv2=(TextView)convertView.findViewById(R.id.ydtext2);         tv1.setText(p.getName());         tv2.setText(p.getPhome());         return convertView;     }                       }

实体类

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package com.example.demo;       public class People {     private String Name ;     private String Phome;                                   public String getName() {         return Name;     }                       public void setName(String name) {         Name = name;     }                       public String getPhome() {         return Phome;     }                       public void setPhome(String phome) {         Phome = phome;     }                       public People(String name,String phone){         super();         this.Name = name;         this.Phome = phone;        } }