Android小部件imageswitcher？

 Error inflating AppWidget AppWidgetProviderInfo(provider=ComponentInfo{test.basic/test.basic.HelloWorldWidget}): android.view.InflateException: Binary XML file line #5: Error
 inflating class android.widget.ImageSwitcher 

<ImageSwitcher android:id="@+id/image_switcher"
    android:layout_width="fill_parent" android:layout_height="fill_parent" />




我创建一个viewfactory的代码是：

    @Override
public void onEnabled(final Context context) {
    readImages(context);

    ImageSwitcher imageSwitcher = getImageSwitcher(context);
    imageSwitcher.setFactory(new ViewFactory() {

        public View makeView() {
            ImageView imageView = new ImageView(context);
            imageView.setBackgroundColor(0xFF000000);
            imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
            imageView.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
            return imageView;
        }
    });
}


任何帮助将不胜感激。

谢谢