效果如下：

布局文件activity_main.xml如下：

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <ImageSwitcher android:id="@+id/imageSwitcher" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="2" android:paddingTop="30px" > </ImageSwitcher> <Gallery android:id="@+id/gallery1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="1" android:spacing="5px" android:unselectedAlpha="0.6" /></RelativeLayout>

MainActivity.java代码如下：

import android.app.ActionBar.LayoutParams;import android.app.Activity;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.ViewFactory;public class MainActivity extends Activity { private int imageId[] = new int[] { R.drawable.a, R.drawable.b, R.drawable.c, R.drawable.d, R.drawable.e, R.drawable.f, R.drawable.g, R.drawable.h, R.drawable.i, R.drawable.j, R.drawable.k }; private ImageSwitcher imageSwitcher; private Gallery gallery; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); imageSwitcher = (ImageSwitcher) this.findViewById(R.id.imageSwitcher); gallery = (Gallery) this.findViewById(R.id.gallery1); // 设置动画效果 imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in)); imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out)); imageSwitcher.setFactory(new ViewFactory() { @Override public View makeView() { ImageView imageView = new ImageView(MainActivity.this); imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); // 设置保持纵横比居中 imageView.setLayoutParams(new ImageSwitcher.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); return imageView; } }); GalleryAdapter adapter = new GalleryAdapter(MainActivity.this,imageId); gallery.setAdapter(adapter); gallery.setSelection(imageId.length / 2); gallery.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view,int position, long id) { imageSwitcher.setImageResource(imageId[position]); } @Override public void onNothingSelected(AdapterView<?> arg0) { } }); }}

其中需要的一个适配器：

import android.content.Context;import android.content.res.TypedArray;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView;public class GalleryAdapter extends BaseAdapter { private int[] imageId; private Context mContext; /** * 穿入上下文和图片资源数组 * @param mContext * @param imageId */ public GalleryAdapter(Context mContext, int[] imageId) { this.mContext = mContext; this.imageId = imageId; } @Override public int getCount() { return imageId.length; } @Override public Object getItem(int position) { return imageId[position]; } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ImageView imageView1; if (convertView == null) { imageView1 = new ImageView(mContext); imageView1.setScaleType(ImageView.ScaleType.FIT_XY); imageView1.setLayoutParams(new Gallery.LayoutParams(180, 135)); TypedArray typedArray = mContext .obtainStyledAttributes(R.styleable.Gallery); imageView1.setBackgroundResource(typedArray.getResourceId( R.styleable.Gallery_android_galleryItemBackground, 0)); imageView1.setPadding(5, 0, 5, 0); // 设置ImageView的内边距 } else { imageView1 = (ImageView) convertView; } imageView1.setImageResource(imageId[position]); // 为ImageView设置要显示的图片 return imageView1; // 返回ImageView }}

到此 OK！

总结

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