책을 보고 따라쓰고 틀린곳이 있나 확인을 해봐도 없는데 도저히 뭐가 문제인지 잘 모르겠더라구염...setOnCheckedChangeListener (new OnCheckedChangeListener() 이부분이 계속 오류나더라구염 제 소스 같은경우는

package com.Cha;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.RadioGroup;
import android.widget.Toast;
import android.widget.ToggleButton;

public class ChaActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        ((Button)findViewById(R.id.btnOpen)).setOnClickListener(listener);
        ((Button)findViewById(R.id.btnSave)).setOnClickListener(listener);
       
        ((ImageButton)findViewById(R.id.btnImg))
        .setOnClickListener(new View.OnClickListener()
        {
        public void onClick(View v){
        EditText edit = (EditText)findViewById(R.id.edit);
        Toast.makeText(ChaActivity.this,
        "Image button click.EditText =" +
        edit.getText().toString(),
        Toast.LENGTH_SHORT).show();
        }
        });
       
        ((CheckBox)findViewById(R.id.chkAutoSave))
        .setOnClickListener(new View.OnClickListener()
        {
        public void onClick(View v){
        Toast.makeText(ChaActivity.this,
        "CheckBox is" +
        (((CheckBox)v).isChecked()?"checked":"unchecked"),
        Toast.LENGTH_SHORT).show();
        }
    });
 
        ((RadioGroup)findViewById(R.id.rdbGp))
        .setOnCheckedChangeListener (new OnCheckedChangeListener()
        {
        public void onCheckedChanged(RadioGroup group, int checkedId) {
        //RadioButton rdb1=(RadioButton)findViewById(R.id.rdb1);
        Toast.makeText(ChaActivity.this,
        "You have clicked the Radio button: " +
        (checkedId == R.id.rdb1? "KBS" : "MBC"),
        Toast.LENGTH_SHORT).show();
        }
        });
       
        ToggleButton toggleButton= (ToggleButton)findViewById(R.id.toggle);
        toggleButton.setOnClickListener(new View.OnClickListener()
        {
        public void onClick(View v) {
        Toast.makeText(ChaActivity.this,
        "Toggle button is" +
        (((ToggleButton)v).isChecked()?"On":"Off"),
        Toast.LENGTH_SHORT).show();
        }
        });
    }
   
    Button.OnClickListener listener = new Button.OnClickListener() {
    public void onClick(View v) {
    switch(v.getId()) {
    case R.id.btnOpen:
    Toast.makeText(ChaActivity.this,
    "You have clicked the Open button",
    Toast.LENGTH_SHORT).show();
    case R.id.btnSave:
    Toast.makeText(ChaActivity.this,
    "You have clicked the Save button",
    Toast.LENGTH_SHORT).show();
 }
}};
}

자바이고

xml파일은

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical" >

  <TextView
        android:layout_width="fill_parent"
        android:text="@string/hello" />
  <Button android:id="@+id/btnSave"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Save"/>
  <Button android:id="@+id/btnOpen"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Open"/>
  <ImageButton android:id="@+id/btnImg"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher"/>
  <EditText android:id="@+id/edit"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:numeric="integer"/>
  <CheckBox android:id="@+id/chkAutoSave"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="AutoSave"/>
  <CheckBox android:id="@+id/star"
        style="?android:attr/starStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
  <RadioGroup android:id="@+id/rdbGp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
  <RadioButton android:id="@+id/rdb1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="KBS"/>
  <RadioButton android:id="@+id/rdb2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="MBC"/>
  </RadioGroup>
  <ToggleButton android:id="@+id/toggle"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"/>
  </LinearLayout>
이렇게 했습니다..도저히 .setOnCheckedChangeListener (new OnCheckedChangeListener()이부분만 오류나서 뭐가 문제인지 정확히 잘 모르겟네염..