Android實現ListView過濾功能，繼承於BaseAdapter，非ArrayAdapter。

 

其實實現ListView過濾功能最方便的便是使用ArrayAdapter，里面自帶的getFilter()方法能很方便的實現此功能，但是在實際的開發中，一般都是繼承於BaseAdapter。還有一種是利用控件AutoComplete，這種方式只是在輸入框的下方重新顯示一個列表，顯然，很多時候這兩種方式也滿足不了我們的要求。

在Activity中定義一個類，讓它實現TextWatcher接口，然后再onTextChanged方法中去過濾。然后常見相應的Pattern和match,來判斷傳入的參數時候符合列表中的數據，符合就加入一個新的列表中。

首先貼出實現的效果圖

 下面貼出主要實現代碼

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("張三","1374456"));
        people.add(new People("張三小子", "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;
    }

}

自定義Adapter

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;
    }

    

}

實體類

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;    
    }
}