ViewPage 轮播图优化，解决oom和白屏问题

public class NativePagerAdapter extends PagerAdapter {    private List<View> mList = new ArrayList<>();    private Context mContext;    private MyItemClick mMyItemClick;    public interface MyItemClick {        void onClick(int position);    }    public void setMyItemClick(MyItemClick myItemClick) {        mMyItemClick = myItemClick;    }    public NativePagerAdapter(Context context, List<EnterpriseResponseModel.BannerItem> list) {        mContext = context;        for (int i = 0; i < list.size(); i++) {            View view = LayoutInflater.from(mContext).inflate(R.layout.item_native_banner, null);            ImageView imageview = (ImageView) view.findViewById(R.id.image);            imageview.setId(i);            Glide.with(mContext).load(list.get(i).imgUrl).into(imageview);            imageview.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    int id = v.getId();                    if (mMyItemClick != null) {                        mMyItemClick.onClick(id);                    }                }            });            mList.add(view);        }    }    @Override    public int getCount() {        //返回一个比较大的值，目的是为了实现无限轮播        return Integer.MAX_VALUE;    }    @Override    public boolean isViewFromObject(View view, Object object) {        return view == object;    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        position = position % mList.size();        View view = mList.get(position);        ViewGroup parent = (ViewGroup)view.getParent();        if(parent!=null){            parent.removeView(view);        }        container.addView(view);        return view;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {//        container.removeView((View) object);//        container.removeView(mList.get(position % mList.size()));        Log.d("pageradpter", "destroyItem: " + container.getChildCount());    }}

将数据转为View存储起来，而不是在instantiateItem中根据数据重组布局,destroyItem中不对view销毁，不然会显示空白图片，instantiateItem中判断view 的parent，存在则销毁,可保证container中存储的view只有list.size.