public class ViewPagerWithTransformer extends ViewPager {

	// 左边的View
	private View mLeftView;
	// 右边的View
	private View mRightView;
	// 平移动画的梯度值
	private float mTranslate;
	// 缩放动画的梯度值
	private float mScale;
	// 最小缩放比例
	private static final float MIN_SCALE = 0.6f;
	// 保存ViewPager上View的对象
	private Map<Integer, View> mViewCache = new HashMap<Integer, View>();

	/**
	 * 设置View的缓存
	 * 
	 * @param position
	 * @param viewCache
	 */
	public void setViewCache(Integer position, View viewCache) {
		mViewCache.put(position, viewCache);
	}

	/**
	 * 从View的缓存集合中移除指定position的View
	 * 
	 * @param position
	 */
	public void removeViewCache(Integer position) {
		mViewCache.remove(position);
	}

	public ViewPagerWithTransformer(Context context, AttributeSet attrs) {
		super(context, attrs);
		// TODO Auto-generated constructor stub
	}

	@Override
	protected void onPageScrolled(int position, float offset, int offsetPixels) {
		super.onPageScrolled(position, offset, offsetPixels);
		mLeftView = mViewCache.get(position);
		mRightView = mViewCache.get(position + 1);
		animStack(mLeftView, mRightView, offset, offsetPixels);
	}
	
	private void animStack(View left, View right, float offset, int offsetPixels) {
		// TODO Auto-generated method stub
		if (right != null) {
			// 从第0页——》到第1页，offset:0~1，缩放比例mScale:0.6~1
			mScale = (1 - MIN_SCALE) * offset + MIN_SCALE;
			//平移的距离
			mTranslate = -getWidth() - getPageMargin() + offsetPixels;

			//使用NineOldAndroids编写属性动画
			ViewHelper.setScaleX(right, mScale);
			ViewHelper.setScaleY(right, mScale);
			ViewHelper.setTranslationX(right, mTranslate);
		}
		if (left != null) {
			// 左边的页永远在最上面
			left.bringToFront();
		}
	}
}

<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" >

    <com.example.viewpagerwithtransformeranim.ViewPagerWithTransformer
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </com.example.viewpagerwithtransformeranim.ViewPagerWithTransformer>

</RelativeLayout>

public class MainActivity extends Activity {

	private int[] imgRes = new int[] { R.drawable.guide_image1, R.drawable.guide_image2, R.drawable.guide_image3 };
	private List<ImageView> imgList = new ArrayList<ImageView>();
	private ViewPagerWithTransformer mViewPager;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);
		mViewPager = (ViewPagerWithTransformer) findViewById(R.id.viewpager);
		mViewPager.setAdapter(new PagerAdapter() {

			@Override
			public boolean isViewFromObject(View arg0, Object arg1) {
				return arg0 == arg1;
			}

			@Override
			public int getCount() {
				return imgRes.length;
			}

			@Override
			public Object instantiateItem(ViewGroup container, int position) {
				ImageView mImageView = new ImageView(MainActivity.this);
				mImageView.setBackgroundResource(imgRes[position]);
				mImageView.setScaleType(ScaleType.CENTER_CROP);
				imgList.add(mImageView);
				//给ViewPager设置View缓存
				mViewPager.setViewCache(position, mImageView);
				container.addView(mImageView);
				return mImageView;
			}

			@Override
			public void destroyItem(ViewGroup container, int position, Object object) {
				//移除ViewPager的View缓存
				mViewPager.removeViewCache(position);
				container.removeView(imgList.get(position));
			}
		});
	}
}