ADD file via upload

BillAdapter.java

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+package com.example.drink_order_system;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import java.util.ArrayList;
+
+public class BillAdapter extends RecyclerView.Adapter {
+    private final ArrayList<Order> mList;
+    private final LayoutInflater mLayoutInflater;
+    private BillAdapter.OnItemClickListener itemClickListener;
+        BillAdapter(LayoutInflater layoutInflater, ArrayList<Order> list) {
+        this.mList = list;
+        mLayoutInflater = layoutInflater;
+        System.out.println("BillAdapter used");
+    }
+
+    @NonNull
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
+        return new BillAdapter.BillViewHolder(
+                mLayoutInflater.inflate(R.layout.order_item, viewGroup, false));
+    }
+    private Order getItem(int position) {
+        return mList.get(position);
+    }
+    public void setOnItemClickListener(BillAdapter.OnItemClickListener listener) {
+        this.itemClickListener = listener;
+    }
+    @Override
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
+        Order target = getItem(position);
+        if (holder instanceof BillAdapter.BillViewHolder) {
+            ((BillAdapter.BillViewHolder) holder).bindBean(target);
+
+            // 设置点击事件监听器
+            holder.itemView.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    if (itemClickListener != null) {
+                        itemClickListener.onItemClick(v, position);
+                    }
+                }
+            });
+        } else {
+            throw new IllegalStateException("Illegal state Exception onBindviewHolder");
+        }
+    }
+
+    public interface OnItemClickListener {
+        void onItemClick(View view, int position);
+    }
+    @Override
+    public int getItemCount() {
+        return mList.size();
+    }
+    private class BillViewHolder extends RecyclerView.ViewHolder {
+        private final TextView TV_number;
+        private final TextView TV_time;
+        private final TextView TV_takeAway;
+        private final TextView TV_cost;
+        BillViewHolder(View itemView) {
+            super(itemView);
+            TV_number = (TextView) itemView.findViewById(R.id.textView_number);
+            TV_time = (TextView) itemView.findViewById(R.id.textView_time);
+            TV_takeAway = (TextView) itemView.findViewById(R.id.textView_takeAway);
+            TV_cost = (TextView) itemView.findViewById(R.id.textView_cost);
+        }
+
+        void bindBean(final Order bean) {
+            TV_number.setText("订单编号："+bean.getOrder_number());
+            TV_time.setText(bean.getTime());
+            if(bean.getTakeAway().equals("1"))
+            {
+                TV_takeAway.setText("外带");
+            }
+            else
+            {
+                TV_takeAway.setText("堂食");
+            }
+            TV_cost.setText("总价：￥ "+bean.getCost());
+        }
+    }
+}