使用ViewPager和RecyclerView实现水平分页功能

/** * ght (c) 2007-2017 xxx Inc. All rights reserved. * * @author lzz *         Created 2017/5/4 10:07 * @license http://www.xxx.net * @link http://www.xxx.net * @description 推荐商品的ViewPager适配器；带有水平分页功能的RecyclerView * * ********************** *   ##     ##      ##  * *                      * *   ##     ##      ##  * * ********************** */public class GoodsPageAdapter extends PagerAdapter {    private List<View> indicators = new ArrayList<>();//水平分页的指示器    private ArrayList<GoodsVo> datas = new ArrayList<>();//RecyclerView数据集合    private Context context;    private LinearLayout llIndicators;//水平分页的容器    public void setDatas(ArrayList<GoodsVo> datas) {        this.datas = datas;    }    public List<View> getIndicators() {        return indicators;    }    public GoodsPageAdapter(Context context, LinearLayout llIndicators) {        this.context = context;        this.llIndicators = llIndicators;    }    /**     * 计算水平分页的数量     *     * @return     */    @Override    public int getCount() {        int count = datas.size() % 6;        int divide = datas.size() / 6;        return count == 0 ? divide : divide + 1;    }    @Override    public boolean isViewFromObject(View view, Object object) {        return view == object;    }    @Override    public RecyclerView instantiateItem(ViewGroup container, int position) {        RecyclerView recyclerView = new RecyclerView(context);        //2行显示。列数量通过item的宽度来控制，显示3列        GridLayoutManager gridLayoutManager = new GridLayoutManager(context, 2, LinearLayoutManager.HORIZONTAL, false);        recyclerView.setLayoutManager(gridLayoutManager);        GoodsDetailsHotGridAdapter hotGridAdapter = new GoodsDetailsHotGridAdapter(context);        recyclerView.setAdapter(hotGridAdapter);        List<GoodsVo> list = new ArrayList<GoodsVo>();        //每页最多显示6个，小于数据集总数，且小于下一页开始的位置索引        for (int i = position * 6; i < (position + 1) * 6 && i < datas.size(); i++) {            list.add(datas.get(i));        }        //初始化指示器。position == 0只初始化一次;且有多页；        for (int i = 0; position == 0 && getCount() != 1 && i < getCount(); i++) {            View indicator = new View(context);            Drawable drawable = context.getResources().getDrawable(R.drawable.indicator_selector);            indicator.setBackground(drawable);            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(24, 24);            params.setMarginEnd(10);            llIndicators.addView(indicator, params);            indicators.add(indicator);        }        hotGridAdapter.setDatas(list);        hotGridAdapter.notifyDataSetChanged();        container.addView(recyclerView);        return recyclerView;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        container.removeViewAt(position);    }}