Listen to text changed event for AutoCompleteTextView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <TextView
    android:id="@+id/selection"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    />
  <AutoCompleteTextView android:id="@+id/edit"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:completionThreshold="3"/>
</LinearLayout>

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.TextView;

public class MainActivity extends Activity
  implements TextWatcher {
  TextView selection;
  AutoCompleteTextView edit;
  String[] items={"lorem", "ipsum", "dolor", "sit", "amet",
          "porttitor", "sodales", "pellentesque", "augue", "purus"};

  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.main);
    selection=(TextView)findViewById(R.id.selection);
    edit=(AutoCompleteTextView)findViewById(R.id.edit);
    edit.addTextChangedListener(this);
    
    edit.setAdapter(new ArrayAdapter<String>(this,
                          android.R.layout.simple_dropdown_item_1line,
                          items));
  }
  
  public void onTextChanged(CharSequence s, int start, int before,
                              int count) {
    selection.setText(edit.getText());
  }
  
  public void beforeTextChanged(CharSequence s, int start,int count, int after) {
    
  }
  
  public void afterTextChanged(Editable s) {
    
  }
}