<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <ImageSwitcher        android:id="@+id/is_switcher"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true" />        <Gallery         android:id="@+id/gallery"        android:layout_width="match_parent"        android:layout_height="60dp"        android:background="#55000000"        android:layout_alignParentBottom="true"        android:layout_alignParentLeft="true"        android:gravity="center_vertical"        android:spacing="16dp"/></RelativeLayout>

public class MainActivity extends Activity implements OnItemSelectedListener,        ViewFactory {    /**     * ImageSwitcher 控件     */    private ImageSwitcher is_switcher;    /**     * Gallery 控件     */    private Gallery galley;    /**     * 小图使用的数组     */    private Integer[] mThumbIds = { R.drawable.pic, R.drawable.pic2,            R.drawable.pic3, R.drawable.pic4, R.drawable.pic5 };    /**     * 大图使用的数组     */    private Integer[] mImageIds = { R.drawable.ic_launcher,            R.drawable.pic2, R.drawable.ic_launcher,            R.drawable.pic2, R.drawable.ic_launcher };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                /**         * 使用无标题的样式         */        requestWindowFeature(Window.FEATURE_NO_TITLE);        /**         * 设置显示的布局文件         */        setContentView(R.layout.activity_main);        /**         * 实例化   ImageSwitcher 控件并与之关联         */        is_switcher = (ImageSwitcher) findViewById(R.id.is_switcher);                /**         * 指代下面的makeView 因为实现了ViewFactory 接口         */        is_switcher.setFactory(this);        // 设置进入动画和出去动画  使用系统默认的样式        is_switcher.setInAnimation(AnimationUtils.loadAnimation(this,                android.R.anim.fade_in));        is_switcher.setOutAnimation(AnimationUtils.loadAnimation(this,                android.R.anim.fade_out));        /**         * 实例化一个Gallery控件并与之绑定         */        galley = (Gallery) findViewById(R.id.gallery);                // 为Gallery 对象设置适配器        galley.setAdapter(new ImageAdapter(this));        /**         * 设置当Gallery对象选项被选择时的监听事件         */        galley.setOnItemSelectedListener(this);    }    @Override    public View makeView() {        ImageView i = new ImageView(this);        i.setBackgroundColor(0xFF000000);        i.setScaleType(ImageView.ScaleType.FIT_CENTER);        i.setLayoutParams(new ImageSwitcher.LayoutParams(                LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));        return i;    }    public class ImageAdapter extends BaseAdapter {        public ImageAdapter(Context c) {            mContext = c;        }        public int getCount() {            return mThumbIds.length;        }        public Object getItem(int position) {            return position;        }        public long getItemId(int position) {            return position;        }        public View getView(int position, View convertView, ViewGroup parent) {            ImageView i = new ImageView(mContext);            i.setImageResource(mThumbIds[position]);            i.setAdjustViewBounds(true);            i.setLayoutParams(new Gallery.LayoutParams(                    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));            i.setBackgroundResource(R.drawable.ic_launcher);            return i;        }        private Context mContext;    }    @Override    public void onItemSelected(AdapterView<?> parent, View view, int position,            long id) {        is_switcher.setImageResource(mImageIds[position]);    }    @Override    public void onNothingSelected(AdapterView<?> parent) {    }}