public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
        private static final float MAX_SCALE = 1.0f;
        private static final float MIN_SCALE = 0.9f;

        @Override
        public void transformPage(View view, float position) {
            if (position < -1) {
                view.setScaleX(MIN_SCALE);
                view.setScaleY(MIN_SCALE);
            } else if (position <= 1) {
                float scaleFactor = MIN_SCALE + (1 - Math.abs(position)) * (MAX_SCALE - MIN_SCALE);
                view.setScaleX(scaleFactor);
                if (position > 0) {
                    view.setTranslationX(-scaleFactor * 2);
                } else if (position < 0) {
                    view.setTranslationX(scaleFactor * 2);
                }
                view.setScaleY(scaleFactor);
            } else {
                view.setScaleX(MIN_SCALE);
                view.setScaleY(MIN_SCALE);
            }

        }
    }

viewPage布局设置 android:clipChildren="false"

ViewPager.setPageTransformer(true, new ZoomOutPageTransformer());