无法从 ViewHolder (RecycleView) 调用 Adapter(onBindViewHolder) 中的方法

Question

I worked on same project in previous Android Studio but now In this newer version am unable to code on the same Project!
I wrote setData method in Viewholder(Adapter) and when am trying to call this method in onBindViewHolder{.. } It is not recognizing this method. (HAVE A LOOK AT UPLOADED IMAGE)
When I press Atl + Enter it shows "rename reference".

Error throwing line - 34 Gist: https://gist.github.com/Reevan799/0babda6746136105f3c4fbdab1c12ae5#file-categoryadapter-java-L34

Error Am Getting Image URL: https://ibb.co/Kq3rg3G

Code:

   package com.example.generalknowledgequiz;

   import android.view.LayoutInflater;
   import android.view.View;
   import android.view.ViewGroup;
   import android.widget.TextView;

   import androidx.annotation.NonNull;
   import androidx.recyclerview.widget.RecyclerView;

   import com.bumptech.glide.Glide;

   import java.util.List;

   import de.hdodenhof.circleimageview.CircleImageView;

   public class CategoryAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

       private List<CategoryModel> categoryModelList;

       public CategoryAdapter(List<CategoryModel> categoryModelList) {
           this.categoryModelList = categoryModelList;
       }

       @NonNull
       @Override
       public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
           View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.category_item,parent,false);
           return new Viewholder(view);
       }

       @Override
       public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
           holder.setData(categoryModelList.get(position).getImageurl(),categoryModelList.get(position).getTitle());  #Error Causing Line..
       }

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

       class Viewholder extends RecyclerView.ViewHolder{

           private CircleImageView imageView;
           private TextView title;

           public Viewholder(@NonNull View itemView) {
               super(itemView);
               imageView = itemView.findViewById(R.id.imageview);
        title = itemView.findViewById(R.id.title);
    }

           private void setData(String url, String title){

               Glide.with(itemView.getContext()).load(url).into(imageView);
               this.title.setText(title);
           }
       }
   }

setData is shown in Red color in Android Studio ( onBindViewHolder )

Answer 1

Change generic type you used for RecyclerView.Adapter . Your class declaration should be:

public class CategoryAdapter extends RecyclerView.Adapter<CategoryAdapter.Viewholder> {
...
}

It will also require you to change the overridden methods declaration.

1. return type changed to Viewholder :

    @NonNull @Override public Viewholder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.category_item,parent,false); return new Viewholder(view); }

2. Argument type changed to Viewholder :

    @Override public void onBindViewHolder(@NonNull Viewholder holder, int position) { holder.setData(categoryModelList.get(position).getImageurl(),categoryModelList.get(position).getTitle()); #Error Causing Line.. }