RecycleView多条目加载

最新推荐文章于 2020-05-20 17:07:28 发布

原创最新推荐文章于 2020-05-20 17:07:28 发布 · 254 阅读

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本文介绍了一种实现多类型数据加载的RecyclerView适配器的详细过程，通过定义不同的ViewHolder来区分不同的视图类型，并根据位置返回相应的布局类型。

多条目加载的适配器

public class RVAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private Context context;
    private List<Beannes.DataBean.Ad5Bean> ad5;

    public RVAdapter(Context context, List<Beannes.DataBean.Ad5Bean> ad5) {
        this.context = context;
        this.ad5 = ad5;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (viewType == 1) {
            View view = View.inflate(context, R.layout.item_rv, null);
            ViewHolder viewHolder = new ViewHolder(view);
            return viewHolder;
        } else {
            View view = View.inflate(context, R.layout.item2_rv, null);
            ViewHolder2 viewHolder = new ViewHolder2(view);
            return viewHolder;
        }
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if (holder instanceof ViewHolder){
            ViewHolder vh1= (ViewHolder) holder;
            vh1.img.setImageURI(Uri.parse(ad5.get(position).getImage()));
            vh1.tvDescription.setText(ad5.get(position).getTitle());
        }else if (holder instanceof ViewHolder2){
            ViewHolder2 vh2= (ViewHolder2) holder;
            vh2.tvTitle.setText(ad5.get(position).getTitle());
        }
    }

    @Override
    public int getItemViewType(int position) {
        if (position % 2 == 0) {
            return 1;
        } else {
            return 2;
        }
    }

    @Override
    public int getItemCount() {
        return ad5.size();
    }

    class ViewHolder extends RecyclerView.ViewHolder {

        private final TextView tvDescription;
        private final ImageView img;

        public ViewHolder(View itemView) {
            super(itemView);
            img = (ImageView) itemView.findViewById(R.id.img);
            tvDescription = (TextView) itemView.findViewById(R.id.tv_description);
        }
    }
    class ViewHolder2 extends RecyclerView.ViewHolder{

        private final TextView tvTitle;

        public ViewHolder2(View itemView) {
            super(itemView);
            tvTitle = (TextView) itemView.findViewById(R.id.tv_title);
        }
    }
}

main设置适配器

	List<Beannes.DataBean.Ad5Bean> ad5 = data.getData().getAd5();
        LinearLayoutManager manager = new LinearLayoutManager(this);
        rv.setLayoutManager(manager);
        RVAdapter rvAdapter = new RVAdapter(MainActivity.this, ad5);
        rv.setAdapter(rvAdapter);