[Added] methods to CouponAdapter

app/src/main/java/com/a1/nextlocation/recyclerview/CouponAdapter.java

@@ -1,8 +1,62 @@
 package com.a1.nextlocation.recyclerview;
 
-public class CouponAdapter {
+import android.content.Context;
+import android.view.View;
+import android.view.ViewGroup;
 
-    class CouponViewHolder {
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.a1.nextlocation.data.Coupon;
+
+import java.util.List;
+
+public class CouponAdapter extends RecyclerView.Adapter<CouponAdapter.CouponViewHolder> {
+
+    private Context appContext;
+    private List<Coupon> couponList;
+    private OnItemClickListener clickListener;
+
+    public interface OnItemClickListener {
+        void onItemClick(int clickedPosition);
+    }
+
+    class CouponViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
+
+        public CouponViewHolder(@NonNull View itemView) {
+            super(itemView);
+        }
+
+        @Override
+        public void onClick(View view) {
+            int clickedPosition = getAdapterPosition();
+            clickListener.onItemClick(clickedPosition);
+        }
+    }
+
+    public CouponAdapter(Context context, List<Coupon> coupon, OnItemClickListener listener){
+        appContext = context;
+        couponList = coupon;
+        clickListener = listener;
+    }
+
+    @NonNull
+    @Override
+    public CouponViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        return null;
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull CouponViewHolder holder, int position) {
 
     }
+
+    @Override
+    public int getItemCount() {
+        return couponList.size();
+    }
+
+
+
+
 }