ViewPager做出广告轮播特效

上图：

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上代码：

        android:clipChildren="false">                    android:layout_marginLeft="38dp"            android:layout_marginRight="38dp"/>

Activity.java

viewpager.setOffscreenPageLimit(3);viewpager.setAdapter(adapter);viewpager.setPageTransformer(true, new ViewPager.PageTransformer(){    @Override    public void transformPage(View page, float position)    {        //最重要的就是这里了        float v = Math.abs(position);        float v1 = (float) (0.2 * (v * v));        page.setScaleY(1 - v1);    }});

PagerAdapter.java

import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.view.View;import java.util.List;/** * Created by xiaolei on 2017/4/5. */public class HomeBannerAdapter extends PagerAdapter{    private List viewLists;        public HomeBannerAdapter(List viewLists)    {        this.viewLists = viewLists;    }        @Override    public int getCount()    {                                                                 //获得size          return viewLists.size();    }    @Override    public boolean isViewFromObject(View view, Object object)    {        return view == object;    }    @Override    public void destroyItem(View view, int position, Object object)                       //销毁Item      {        ((ViewPager) view).removeView(viewLists.get(position));    }    @Override    public Object instantiateItem(View view, int position)                                //实例化Item      {        ((ViewPager) view).addView(viewLists.get(position), 0);        return viewLists.get(position);    }}

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