edittext+listview实现搜索listview中的内容方法(推荐)

public class MainActivity extends Activity { 
 private EditText et_filter; 
 private UserAdapter adapter; 
 private ListView lv_list; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  List userInfos = new ArrayList(); 
  for (int i = 0; i <2; i++) { 
   UserInfo user = new UserInfo(); 
   user.setUsername("张三" + i); 
   user.setPhonenum("12345" + i); 
   userInfos.add(user); 
  } 
  for (int i = 0; i <2; i++) { 
   UserInfo user = new UserInfo(); 
   user.setUsername("李四" + i); 
   user.setPhonenum("12345" + i); 
   userInfos.add(user); 
  } 
   
  lv_list = (ListView) findViewById(R.id.lv_list); 
  adapter = new UserAdapter(MainActivity.this, userInfos); 
  lv_list.setAdapter(adapter); 
   
  et_filter = (EditText) findViewById(R.id.et_filter); 
  et_filter.addTextChangedListener(new TextWatcher() { 
 
   @Override 
   public void onTextChanged(CharSequence s, int start, int before, 
     int count) { 
    adapter.getFilter().filter(et_filter.getText().toString()); 
 
   } 
 
   @Override 
   public void beforeTextChanged(CharSequence s, int start, int count, 
     int after) { 
     
   } 
 
   @Override 
   public void afterTextChanged(Editable s) { 
 
   } 
  }); 
 
 } 
} 

package com.example.edittextfilterdemo; 
import java.util.ArrayList; 
import java.util.List; 
import android.content.Context; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.Filter; 
import android.widget.Filterable; 
import android.widget.TextView; 
/** 
 * 自定义具有过滤功能的adapter类 
 * 
 */ 
public class UserAdapter extends BaseAdapter implements Filterable { 
 private MyFilter myFilter; 
 private List userInfos; 
 private Context context; 
 private ArrayList mOriginalValues; 
 
  private final Object mLock = new Object(); 
 
  public UserAdapter(Context context, List userInfos) { 
   this.cOntext= context; 
   this.userInfos = userInfos; 
 
  } 
 
  @Override 
  public int getCount() { 
   // TODO Auto-generated method stub 
   return userInfos.size(); 
  } 
 
  @Override 
  public Object getItem(int arg0) { 
   // TODO Auto-generated method stub 
   return userInfos.get(arg0); 
  } 
 
  @Override 
  public long getItemId(int position) { 
   // TODO Auto-generated method stub 
   return position; 
  } 
 
  @Override 
  public View getView(int position, View convertView, ViewGroup parent) { 
 
   View view = convertView; 
 
   ViewHolder holder; 
   if (view == null) { 
    view = LayoutInflater.from(context).inflate(R.layout.list_item, 
     null); 
    holder = new ViewHolder(); 
 
    holder.tv_nick = (TextView) view.findViewById(R.id.tv_nick); 
    holder.tv_mobile = (TextView) view.findViewById(R.id.tv_mobile); 
    view.setTag(holder); 
   } else { 
    holder = (ViewHolder) view.getTag(); 
   } 
 
   holder.tv_nick.setText(userInfos.get(position).getUsername()); 
   holder.tv_mobile.setText(userInfos.get(position).getPhonenum()); 
 
   return view; 
  } 
 
  static class ViewHolder { 
 
   TextView tv_nick; 
   TextView tv_mobile; 
  } 
 
  @Override 
  public Filter getFilter() { 
   if (myFilter == null) { 
    myFilter = new MyFilter(); 
   } 
   return myFilter; 
  } 
 
  class MyFilter extends Filter { 
 
   @Override 
   protected FilterResults performFiltering(CharSequence prefix) { 
    // 持有过滤操作完成之后的数据。该数据包括过滤操作之后的数据的值以及数量。 count:数量 values包含过滤操作之后的数据的值 
    FilterResults results = new FilterResults(); 
 
    if (mOriginalValues == null) { 
    synchronized (mLock) { 
     // 将list的用户 集合转换给这个原始数据的ArrayList 
     mOriginalValues = new ArrayList(userInfos); 
    } 
    } 
    if (prefix == null || prefix.length() == 0) { 
    synchronized (mLock) { 
     ArrayList list = new ArrayList( 
       mOriginalValues); 
     results.values = list; 
     results.count = list.size(); 
    } 
    } else { 
    // 做正式的筛选 
    String prefixString = prefix.toString().toLowerCase(); 
 
    // 声明一个临时的集合对象 将原始数据赋给这个临时变量 
    final ArrayList values = mOriginalValues; 
 
    final int count = values.size(); 
 
    // 新的集合对象 
    final ArrayList newValues = new ArrayList( 
      count); 
 
    for (int i = 0; i ) results.values; 
 
    if (results.count > 0) { 
    notifyDataSetChanged(); 
    } else { 
    notifyDataSetInvalidated(); 
    } 
   } 
 
  } 
 }