这是我正在关注的教程link,下面是截图：

试图为每个部分显示不同的视图.喜欢：

对于第1节(layout_1.xml)

对于第2节(layout_2.xml)

对于第3节(layout_3.xml)

但是在每个Section中显示layout_1.xml的布局视图……(第1,2,3节)

我可以知道我的代码在哪里犯了错误,我错过了什么？

public class SectionListDataAdapter extends RecyclerView.Adapter<SectionListDataAdapter.SingleItemRowHolder> {
 
    private ArrayList<SingleItemModel> itemsList;
    private Context mContext;
 
    public SectionListDataAdapter(Context context,ArrayList<SingleItemModel> itemsList) {
        this.itemsList = itemsList;
        this.mContext = context;
    }
 
    @Override
    public SingleItemRowHolder onCreateViewHolder(ViewGroup viewGroup,int i) {
 
        switch (i) {
 
            case 0:
                View viewONE = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.layout_1,null,false);
                SingleItemRowHolder rowONE = new SingleItemRowHolder(viewONE);
                return rowONE;
 
            case 1:
                View viewTWO = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.layout_2,false);
                SingleItemRowHolder rowTWO = new SingleItemRowHolder(viewTWO);
                return rowTWO;
 
            case 2:
                View viewTHREE = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.layout_3,false);
                SingleItemRowHolder rowTHREE = new SingleItemRowHolder(viewTHREE);
                return rowTHREE;
 
        }
 
        return null;
 
    }
 
    @Override
    public void onBindViewHolder(SingleItemRowHolder holder,int i) {
 
        SingleItemModel singleItem = itemsList.get(i);
        holder.tvTitle.setText(singleItem.getName());
    }
 
    @Override
    public int getItemCount() {
        return (null != itemsList ? itemsList.size() : 0);
    }
 
    public class SingleItemRowHolder extends RecyclerView.ViewHolder {
 
        protected TextView tvTitle;
 
        protected ImageView itemImage;
 
 
        public SingleItemRowHolder(View view) {
            super(view);
 
            this.tvTitle = (TextView) view.findViewById(R.id.tvTitle);
            this.itemImage = (ImageView) view.findViewById(R.id.itemImage);
 
            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
 
                    Toast.makeText(v.getContext(),tvTitle.getText(),Toast.LENGTH_SHORT).show();
 
                }
            });
 
        }
 
    }
 
}