ArrayAdapter 的 getView 方法的 RecyclerView.Adapter 等价物是什么

Question

我正在将 ScrollView 转换为 RecyclerView。在我的一种方法中，我最初声明了这一点：

View item = listAdapter.getView(i, null, (ViewGroup) template);

listAdapter本来是一个ArrayAdapter，但我写了一个新的RecyclerView.Adapter，现在声明为这样。我想知道如何重写上面的语句，因为 RecyclerView.Adapter 没有 getView 方法。

Answer 1

与RecyclerView不同，你管理RecyclerView.AdapterClass中的所有数据：

如果你用 ViewHolder 编写了 RecyclerView.Adapter，你可以得到 getView变成你写的RecyclerView.AdapterClass。它在 onBindViewHolder 方法中

你只需要这样称呼它：

holder.itemView

这里是我写的一个RecyclerViewAdapter class例子，展示了如何调用itemView中的[=20] =]onBindViewHolder 我为 itemView 分配了一个 onItemClickListener，我还有 2 个 TextViews（在 ViewHolder底部）

        public class SampleRecyclerAdapter extends RecyclerView.Adapter<SampleRecyclerAdapter.ViewHolder> {
            private ArrayList<Order> orderList;
            private LayoutInflater mLayoutInflater;
            private Context context;

        public SampleRecyclerAdapter(Context context, ArrayList<Order> orderList) {
            this.orderList = orderList;
            this.mLayoutInflater = LayoutInflater.from(context);
            this.context = context;
        }

        @Override
        public SampleRecyclerAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = mLayoutInflater.inflate(R.layout.recycler_item_order, parent, false);
            return new SampleRecyclerAdapter.ViewHolder(view);
        }

        @Override
        public void onBindViewHolder(final SampleRecyclerAdapter.ViewHolder holder, int position) {
            final Order order = orderList.get(position);
            holder.date.setText(order.getFormattedDate()+", "+ order.getFormattedTime());
            holder.orderNumber.setText(order.getUid());

    //Here, calling itemView (equivalent of listAdapter.getView()) and setting a onClickListener as an example. You can do whatever you want.
            holder.itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent = new Intent(context, OrderDetailActivity.class);
                    intent.putExtra("order", order);
                    context.startActivity(intent);
                }
            });
        }

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

  //In the ViewHolder you declare all the components of your xml layout for you recyclerView items ( and the data is assigned in the onBindViewHolder, above)  
        class ViewHolder extends RecyclerView.ViewHolder {

            private TextView date, orderNumber;

            private ViewHolder(View itemView) {
                super(itemView);
                date = (TextView) itemView.findViewById(R.id.textViewDate);
                orderNumber = (TextView) itemView.findViewById(R.id.textViewOrderNumber);
            }
        }
    }

ArrayAdapter 的 getView 方法的 RecyclerView.Adapter 等价物是什么

What is RecyclerView.Adapter's equivalent for ArrayAdapter's getView method

android

android-arrayadapter

android-recyclerview