Android Eclipse Listview Arama Yardım

import java.util.ArrayList;  
  import java.util.Arrays;  
   
  import android.app.Activity;  
  import android.app.ListActivity;  
  import android.os.Bundle;  
  import android.text.Editable;  
  import android.text.TextWatcher;  
  import android.view.LayoutInflater;  
  import android.view.View;  
  import android.view.ViewGroup;  
  import android.widget.AdapterView;  
  import android.widget.AdapterView.OnItemClickListener;  
  import android.widget.BaseAdapter;  
  import android.widget.EditText;  
  import android.widget.ListView;  
  import android.widget.TextView;  
  import android.widget.Toast;  
   
  public class MainActivity extends ListActivity {  
   
  private EditText et;  
  private ListView lv;  
  private String[] listview_names = {"android","samsung","htc","nokıa",  
  };  
   
  private ArrayList<String> array_sort;  
  int textlength=0;  
   
  public void onCreate(Bundle savedInstanceState)  
  {  
  super.onCreate(savedInstanceState);  
  setContentView(R.layout.activity_main);  
   
  et = (EditText) findViewById(R.id.EditText01);  
  lv	=	(ListView) findViewById(android.R.id.list);  
   
  array_sort=new ArrayList<String> (Arrays.asList(listview_names));  
  setListAdapter(new bsAdapter(this));  
   
   
  et.addTextChangedListener(new TextWatcher()  
  {  
  public void afterTextChanged(Editable s)  
  {  
  // Abstract Method of TextWatcher Interface.  
  }  
  public void beforeTextChanged(CharSequence s,  
  int start, int count, int after)  
  {  
  // Abstract Method of TextWatcher Interface.  
  }  
  public void onTextChanged(CharSequence s,  
  int start, int before, int count)  
  {  
  textlength = et.getText().length();  
  array_sort.clear();  
  for (int i = 0; i < listview_names.length; i++)  
  {  
  if (textlength <= listview_names.length())  
  {  
  /***  
  * If you want to highlight the countries which start with  
  * entered letters then choose this block.  
  * And comment the below If condition Block  
  */  
  /*if(et.getText().toString().equalsIgnoreCase(  
  (String)  
  listview_names.subSequence(0,  
  textlength)))  
  {  
  array_sort.add(listview_names);  
  image_sort.add(listview_images);  
  }*/  
   
  /***  
  * If you choose the below block then it will act like a  
  * Like operator in the Mysql  
  */  
   
  if(listview_names.toLowerCase().contains(  
  et.getText().toString().toLowerCase().trim()))  
  {  
  array_sort.add(listview_names);  
  }  
  }  
  }  
  AppendList(array_sort);  
  }  
  });  
   
  lv.setOnItemClickListener(new OnItemClickListener() {  
   
  public void onItemClick(AdapterView<?> arg0,  
  View arg1, int position, long arg3)  
  {  
  Toast.makeText(getApplicationContext(), array_sort.get(position),  
  Toast.LENGTH_SHORT).show();  
  }  
  });  
  }  
   
  public void AppendList(ArrayList<String> str)  
  {  
  setListAdapter(new bsAdapter(this));  
  }  
   
  public class bsAdapter extends BaseAdapter  
  {  
  Activity cntx;  
  public bsAdapter(Activity context)  
  {  
  // TODO Auto-generated constructor stub  
  this.cntx=context;  
   
  }  
   
  public int getCount()  
  {  
  // TODO Auto-generated method stub  
  return array_sort.size();  
  }  
   
  public Object getItem(int position)  
  {  
  // TODO Auto-generated method stub  
  return array_sort.get(position);  
  }  
   
  public long getItemId(int position)  
  {  
  // TODO Auto-generated method stub  
  return array_sort.size();  
  }  
   
  public View getView(final int position, View convertView, ViewGroup parent)  
  {  
  View row=null;  
   
  LayoutInflater inflater=cntx.getLayoutInflater();  
  row=inflater.inflate(R.layout.search_list_item, null);  
   
  TextView tv	=	(TextView)	row.findViewById(R.id.title);  
   
  tv.setText(array_sort.get(position));  
   
  return row;  
  }  
  }  
  }