RecyclerView 实现轮播图

 RecyclerView

mHeaderView = LayoutInflater.from(getContext()).inflate(R.layout.item_first_fragment_header, null);
        listviewLayout.addHeaderView(mHeaderView);
        mViewHolder = new ViewHolder(mHeaderView);
        coverRecyclerViewAdapter = new CoverRecyclerViewAdapter(getContext(), headListBean, new CoverRecyclerViewAdapter.onItemClick() {
            @Override
            public void clickItem(int position) {
                if (count == 0) return;
                GuanerBean.DataBean dataBean = headListBean.get(position % count);
                if (dataBean == null) return;
                String groupId = dataBean.getId();
                DetailAcivity.launch(activity, groupId);
            }
        });
        mViewHolder.coverResyclerview.setHasFixedSize(true);
        mViewHolder.coverResyclerview.setAdapter(coverRecyclerViewAdapter);
        mViewHolder.coverResyclerview.setAlphaItem(true); //设置灰度渐变
        mViewHolder.coverResyclerview.scrollToPosition(1000);

定时

private void doStart() {
        isStart = true;
        if (mTimer == null) {
            mTimer = new Timer();
        }
        mTimer.schedule(new AutoTask(),TIME,TIME);
    }

    private class AutoTask extends TimerTask {
        @Override
        public void run() {
            mHandler.post(runnable);
        }
    }

    private final static class AutoHandler extends android.os.Handler {}

    private Runnable runnable = new Runnable() {
        @Override
        public void run() {
            currentPage = mViewHolder.coverResyclerview.getSelectedPos();
            currentPage++;
            mViewHolder.coverResyclerview.smoothScrollToPosition(currentPage);
        }
    };

    public void stop() {
        isStart = false;
        if (mTimer != null) {//先取消定时器
            mTimer.cancel();
            mTimer = null;
        }
    }

Adapter

public class CoverRecyclerViewAdapter extends RecyclerView.Adapter<CoverRecyclerViewAdapter.ViewHolder> {

    private Context mContext;
    List<GuanerBean.DataBean> mDataBeans;
    private onItemClick clickCb;

    public CoverRecyclerViewAdapter(Context c, List<GuanerBean.DataBean> dataBeans, onItemClick cb) {
        mDataBeans = dataBeans;
        mContext = c;
        clickCb = cb;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(mContext).inflate(R.layout.coverflow_recyclerview_item, parent, false);
        return new ViewHolder(v);
    }

    @Override
    public long getItemId(int position) {
        if (mDataBeans != null && mDataBeans.size() > 0) {
            return Long.parseLong(mDataBeans.get(position).getId());
        }
        return 0;
    }

    @Override
    public int getItemCount() {
        if (mDataBeans == null || mDataBeans.size() < 0) {
            return 0;
        }
        return Integer.MAX_VALUE;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
        if (null == mDataBeans || mDataBeans.size() <= 0) return;
        GuanerBean.DataBean dataBean = mDataBeans.get(position % mDataBeans.size());
        System.out.println("position % mDataBeans.size() : position="+ position +" % "+mDataBeans.size()+" = "+position % mDataBeans.size());
        if (dataBean != null) {
            String[] pics;
            if (!TextUtils.isEmpty(dataBean.getBanner_pics())) {
                pics = dataBean.getBanner_pics().split("\\,");
                if (null != pics && pics.length > 0) {
                    String picUrl = DubPreferenceUtils.getString(mContext, Url.domain) + pics[0];
                    if (!TextUtils.isEmpty(picUrl)) {
                        /*DisplayImageOptions option=new DisplayImageOptions.Builder()
                                .showImageOnLoading(R.drawable.ic_launcher)//设置图片下载期间显示的图片
                                .showImageForEmptyUri(R.drawable.data_error)//设置图片uri为空或是错误的时候显示的图片
                                .showImageOnFail(R.drawable.add_pic).build();//设置图片加载或解码过程中发生错误显示的图片*/
                        ImageLoader.getInstance().displayImage(picUrl, holder.img, new ImageLoadingListener() {
                            @Override
                            public void onLoadingStarted(String s, View view) {}

                            @Override
                            public void onLoadingFailed(String s, View view, FailReason failReason) {
                                ((ImageView) view).setImageDrawable(mContext.getResources().getDrawable(R.drawable.add_pic));
                            }

                            @Override
                            public void onLoadingComplete(String s, View view, Bitmap bitmap) {}

                            @Override
                            public void onLoadingCancelled(String s, View view) {}
                        });
                    }
                }
            }
        }

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Toast.makeText(mContext, "点击了："+position, Toast.LENGTH_SHORT).show();
                if (clickCb != null) {
                    clickCb.clickItem(position % mDataBeans.size());
                }
            }
        });
    }

    public void setListItems(List<GuanerBean.DataBean> dataBeans) {
        this.mDataBeans = dataBeans;
    }

    public int getDataCount() {
        if (mDataBeans != null) {
            return mDataBeans.size();
        }
        return 0;
    }

    class ViewHolder extends RecyclerView.ViewHolder {
        RoundImage img;

        public ViewHolder(View itemView) {
            super(itemView);
            img = itemView.findViewById(R.id.img);
        }
    }

    public interface onItemClick {
        void clickItem(int pos);
    }
}