图片切换遇到一个问题，希望有高人指点一下！谢谢！

错误提示：at android.widget.ImageSwitcher.setImageResource(ImageSwitcher.java:41)
          at android.widget.ImageSwitcher.setImageResource(ImageSwitcher.java:41)
这是我的代码部分public class MainActivity extends Activity implements ViewFactory{
//ViewFactory主要用来将显示的图片和父窗口区分开来
private int pos = 0;
private Button button01;
private Button button02;
private ImageSwitcher imageSwitcher01;
//定义整型数组，即图片资源
private Integer[] mImageIds = {
   R.drawable.baiyang,
   R.drawable.chunv,
   R.drawable.jinniu,
   R.drawable.juxie,
   R.drawable.mojie,
   R.drawable.sheshou,
   R.drawable.shizi,
   R.drawable.shuangyu,
   R.drawable.shuangzi,
   R.drawable.shuiping,
   R.drawable.tiancheng,
   R.drawable.tianxie};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setupViewComponent();
}
private void setupViewComponent() {
//获取对象
button01 = (Button) findViewById(R.id.button01);
button02 = (Button) findViewById(R.id.button02);
imageSwitcher01 = (ImageSwitcher) findViewById(R.id.imageSwitcher01);
imageSwitcher01.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.slide_in_left));
imageSwitcher01.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.slide_out_right));
//为button设置监听事件
button01.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
imageSwitcher01.setImageResource(mImageIds [pos]);
if(pos>0) {
pos--;
}
else pos = 11;
}

});
button02.setOnClickListener(new OnClickListener() { @Override
public void onClick(View v) {
// TODO Auto-generated method stub
imageSwitcher01.setImageResource(mImageIds [pos]);
if (pos < mImageIds.length) {
pos++;
}
else pos = 0;
}

});
}

@Override
public View makeView() {
// TODO Auto-generated method stub
//将所有图片通过imageView来显示
ImageView imageView  = new ImageView(this);
imageView.setBackgroundColor(0xFF0000);
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setLayoutParams(new ImageSwitcher.LayoutParams
(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));

return imageView;
}}
非常感谢啊！检查了很久没查出来呢