MainActivity部分：

package com.example1.administrator.gallerydemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Gallery;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher;

public class MainActivity extends AppCompatActivity implements OnItemSelectedListener, ViewSwitcher.ViewFactory{
    private int[] img={R.drawable.img_1,R.drawable.img_2,R.drawable.img_3,R.drawable.img_4,R.drawable.img_5,R.drawable.img_6};
    private Gallery gallery;
    private ImageSwitcher is;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gallery= (Gallery) findViewById(R.id.gallery);
        is = (ImageSwitcher) findViewById(R.id.imageSwitcher);
        ImageAdapter adapter =new ImageAdapter(this,img);
        gallery.setAdapter(adapter);
        gallery.setOnItemSelectedListener(this);
        is.setFactory(this);
        is.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in));
        is.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out));
    }

    @Override
    public View makeView() {
        ImageView image =new ImageView(this);
        image.setScaleType(ImageView.ScaleType.FIT_CENTER);
        return image;
    }

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
        is.setBackgroundResource(img[position%img.length]);
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {

    }
}

适配器部分：
package com.example1.administrator.gallerydemo;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

/**
 * Created by Administrator on 2016/10/5.
 */
public class ImageAdapter extends BaseAdapter {
    private int[] img;
    private Context context;

    public ImageAdapter(Context context, int []img) {
        this.img = img;
        this.context=context;
    }

    @Override
    public int getCount() {
        return Integer.MAX_VALUE;
    }

    @Override
    public Object getItem(int position) {
        return img[position];
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView image = new ImageView(context);
        image.setBackgroundResource(img[position%img.length]);
        image.setLayoutParams(new Gallery.LayoutParams(200,150));
        image.setScaleType(ImageView.ScaleType.FIT_XY);
        return image;
    }
}

xml布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example1.administrator.gallerydemo.MainActivity">

    <Gallery
        android:id="@+id/gallery"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
         />

    <ImageSwitcher
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/imageSwitcher"
         />

</LinearLayout>