Question

我有3个文本的循环视图，有没有办法更新特定项目点击该位置，（我有每个项目的数量，我想提高该项目的数量点击该位置，0,1,2 ，3 ...）这是我的receycleview：

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.RecyclerViewHolder> {
    String [] Item_names,Price_items,Item_quantity;
    public RecyclerAdapter(String [] Item_names,String [] Price_items,String [] Item_quantity)
    {
        this.Item_names=Item_names;
        this.Price_items=Price_items;
        this.Item_quantity=Item_quantity;
    }
    @Override
    public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_layout,parent,false);
        RecyclerViewHolder recyclerViewHolder=new RecyclerViewHolder(view);
        return recyclerViewHolder;
    }

    @Override
    public void onBindViewHolder(final RecyclerViewHolder holder, final int position) {
        holder.ItemNameRecycler.setText(Item_names[position]);
        holder.ItemPriceRecycler.setText(Price_items[position]);
        holder.ItemQuantityRecycler.setText(Item_quantity[position]);
    }

    @Override
    public int getItemCount() {
        return  Item_names.length;
    }
    public static class RecyclerViewHolder extends RecyclerView.ViewHolder{
        TextView ItemPriceRecycler,ItemNameRecycler,ItemQuantityRecycler;
        public RecyclerViewHolder(View view)
        {
            super(view);
            ItemNameRecycler=(TextView)view.findViewById(R.id.RowItemName);
            ItemPriceRecycler=(TextView)view.findViewById(R.id.RowItemPrice);
            ItemQuantityRecycler=(TextView)view.findViewById(R.id.RowItemQuantity);
            ItemQuantityRecycler.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                }
            });
        }
    }
}

Answer 1

您可以使用getAdapterPosition

来自文档：

返回由此表示的项的适配器位置 ViewHolder。

你的代码中的

：

 public static class RecyclerViewHolder extends RecyclerView.ViewHolder{
        TextView ItemPriceRecycler,ItemNameRecycler,ItemQuantityRecycler;
        public RecyclerViewHolder(View view)
        {
            super(view);
            ItemNameRecycler=(TextView)view.findViewById(R.id.RowItemName);
            ItemPriceRecycler=(TextView)view.findViewById(R.id.RowItemPrice);
            ItemQuantityRecycler=(TextView)view.findViewById(R.id.RowItemQuantity);
            ItemQuantityRecycler.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    // get position
                    int pos = getAdapterPosition();  //get position here
                }
            });
        }

修改

用于更新recylerview
中的Textview项onClick()
public static class RecyclerViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener { TextView ItemPriceRecycler, ItemNameRecycler, ItemQuantityRecycler; public RecyclerViewHolder(final View itemView) { super(itemView); ItemNameRecycler = (TextView) itemView.findViewById(R.id.RowItemName); ItemPriceRecycler = (TextView) itemView.findViewById(R.id.RowItemPrice); ItemQuantityRecycler = (TextView) itemView.findViewById(R.id.RowItemQuantity); ItemQuantityRecycler.setOnClickListener(this); } // onClick Listener for view @Override public void onClick(View v) { if (v.getId() == ItemQuantityRecycler.getId()) { int pos = getAdapterPosition(); int value = pos + 1; Toast.makeText(v.getContext(), "ITEM PRESSED = " + String.valueOf(getAdapterPosition()), Toast.LENGTH_SHORT).show(); ItemQuantityRecycler.setText(String.valueOf(value)); } else { } } }

从项目onclick更新recycleview行

1 个答案: