ToggleButton状态开关的使用

package com.example.sample_onofflamp;

import android.app.Activity;
import android.os.Bundle;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.ToggleButton;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ToggleButton tg=(ToggleButton)findViewById(R.id.toggleButton1);
tg.setOnCheckedChangeListener(new OnCheckedChangeListener() {

@Override
public void onCheckedChanged(CompoundButton buttonView, 
boolean isChecked) {
// TODO Auto-generated method stub
setBulbState(isChecked);
}});
}
 void setBulbState(boolean state){
 ImageView iv=(ImageView)findViewById(R.id.imageView1);
 iv.setImageResource((state)?R.drawable.icon1:R.drawable.icon);
ToggleButton tg=(ToggleButton)findViewById(R.id.toggleButton1);
 tg.setChecked(state);