ViewPager 卡片效果

CB74C9551D0317305541567A87A421A5.jpg

private void initViewPager() {

        //  RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ChimelongApp.screenWidth * 8 / 10, ChimelongApp.screenHeight * 8 / 10);
        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ChimelongApp.screenWidth * 8 / 10, ViewGroup.LayoutParams.WRAP_CONTENT);
        mViewPager.setLayoutParams(params);
        mViewPager.setAdapter(adapter);
        relativeLayout = (RelativeLayout) findViewById(R.id.relativelayout);
        mViewPager.setOffscreenPageLimit(2);
        mViewPager.setPageMargin(30);
        mViewPager.setClipChildren(false); //用来定义他的子控件是否要在他应有的边界内进行绘制
        mViewPager.setPageTransformer(false, new ZoomOutPageTransformer());
        mViewPager.setCurrentItem(mPosition);
        relativeLayout.setClipChildren(false);
    }

//设置切换动画
    public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
        private static final float MAX_SCALE = 1.0f;
        private static final float MIN_SCALE = 0.9f;//0.85f

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