viewpager显示图片的Adapter

package com.ming.chiye.yishanghorse.Adapter;

import android.content.Context;
import android.graphics.Color;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.lidroid.xutils.BitmapUtils;
import com.ming.chiye.yishanghorse.Bean.TeacherInitDataBean;
import com.ming.chiye.yishanghorse.Utils.MyLog;

import java.util.ArrayList;
import java.util.List;

public class TeachrtCarouselAdapter extends PagerAdapter {
    List<TeacherInitDataBean.ContainerBean> ContainerBeans;
    private final List<ImageView> imageViews;

    public TeachrtCarouselAdapter(List<TeacherInitDataBean.ContainerBean> ContainerBeans, Context context) {
        super();
        this.ContainerBeans = ContainerBeans;
        imageViews = new ArrayList<>();
        BitmapUtils bitmapUtils = new BitmapUtils(context);

        for (int i = 0; i < ContainerBeans.size(); i++) {
            ImageView imageView = new ImageView(context);
            imageView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
            imageView.setScaleType(ImageView.ScaleType.FIT_XY);
            String url = ContainerBeans.get(i).getImgurl();
            bitmapUtils.display(imageView, url);
            imageViews.add(i + 1, imageView);
            if (i == 0) {
                ImageView imageView1 = new ImageView(context);
                bitmapUtils.display(imageView1, url);
                imageViews.add(ContainerBeans.size() + 1, imageView1);
            }
            if (i == ContainerBeans.size() - 1){
                ImageView imageView2 = new ImageView(context);
                bitmapUtils.display(imageView2, url);
                imageViews.add(0, imageView2);
            }
        }
        ImageView lastimageview = new ImageView(context);
        lastimageview.setImageDrawable(imageViews.get(0).getDrawable());
        imageViews.add(lastimageview);
    }

    @Override
    public int getCount() {
        return imageViews.size();

    }

    @Override
    public boolean isViewFromObject(@NonNull View view, @NonNull Object o) {
        return view == o;//
    }

    @NonNull
    @Override
    public Object instantiateItem(@NonNull ViewGroup container, int position) {
        container.addView(imageViews.get(position));//将image添加到容器中显示
        return imageViews.get(position);//返回当前下标要显示的imageview
    }

    @Override
    public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
        container.removeView(imageViews.get(position));//销毁的item
    }
}