ADD file via upload

OrderAdapter.java

@@ -0,0 +1,110 @@
+package com.example.drink_order_system;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageButton;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.squareup.picasso.Picasso;
+
+import java.util.ArrayList;
+
+public class OrderAdapter extends RecyclerView.Adapter {
+    private final ArrayList<Ordered_drinks> mList;
+    private final LayoutInflater mLayoutInflater;
+    private OrderAdapter.MyClickListener mListener;
+    OrderAdapter(LayoutInflater layoutInflater, ArrayList<Ordered_drinks> list) {
+        this.mList = list;
+        mLayoutInflater = layoutInflater;
+        System.out.println("OrderAdapter used");
+    }
+
+    @NonNull
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
+        return new OrderViewHolder(
+                mLayoutInflater.inflate(R.layout.bill_item, viewGroup, false));
+    }
+    private Ordered_drinks getItem(int position) {
+        return mList.get(position);
+    }
+
+    public void buttonSetOnClick(OrderAdapter.MyClickListener mListener)
+    {
+        this.mListener=mListener;
+    }
+
+    public interface MyClickListener{
+        public void onAddClick(View v, int position);
+        public void onSubClick(View v, int position);
+    }
+    @Override
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
+        Ordered_drinks target = getItem(position);
+        if (holder instanceof OrderViewHolder) {
+            ((OrderViewHolder) holder).bindBean(target);
+            ((OrderViewHolder) holder).BT_add.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    if(mListener!=null)
+                    {
+                        mListener.onAddClick(v, holder.getAdapterPosition());
+                    }
+                }
+            });
+            ((OrderViewHolder) holder).BT_subtract.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    if(mListener!=null)
+                    {
+                        mListener.onSubClick(v, holder.getAdapterPosition());
+                    }
+                }
+            });
+        } else {
+            throw new IllegalStateException("Illegal state Exception onBindviewHolder");
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        return mList.size();
+    }
+    private class OrderViewHolder extends RecyclerView.ViewHolder {
+        private final TextView drinkName;
+        private final TextView drinkIntro;
+        private final TextView drinkPrice;
+        private ImageButton addBt;
+        private ImageButton subBt;
+        private final ImageView drinkImg;
+        private TextView drinkNumber;
+        private ImageButton BT_add;
+        private ImageButton BT_subtract;
+
+        OrderViewHolder(View itemView) {
+            super(itemView);
+            drinkName = (TextView) itemView.findViewById(R.id.Text_drinkName);
+            drinkIntro = (TextView) itemView.findViewById(R.id.Text_drinkIntro);
+            drinkPrice = (TextView) itemView.findViewById(R.id.Text_drinkPrice);
+            drinkImg = (ImageView) itemView.findViewById(R.id.img_drink);
+            addBt = (ImageButton) itemView.findViewById(R.id.button_add);
+            subBt = (ImageButton) itemView.findViewById(R.id.button_subtract);
+            drinkNumber = (TextView) itemView.findViewById(R.id.textView_drinkNumber);
+            BT_add = (ImageButton) itemView.findViewById(R.id.button_add);
+            BT_subtract = (ImageButton) itemView.findViewById(R.id.button_subtract);
+        }
+
+        void bindBean(final Ordered_drinks bean) {
+            drinkName.setText(bean.get_drink().get_name()+"  #"+(bean.get_drink().get_number()+1));
+            //drinkImg.setImageResource(bean.get_drink().getImageResId());
+            Picasso.get().load(bean.get_drink().get_imagePath()).into(drinkImg);
+                drinkPrice.setText(String.format("￥ %.0f", (bean.get_drink().get_price())*bean.get_drink_number()));
+            drinkNumber.setText(String.valueOf(bean.get_drink_number()));
+        }
+    }
+}