Problème avec l'adaptateur et recyclerview

Je fais une application pour télécharger des photos et les montrer dans une galerie.

Quand j'exécute mon application, il ne charge pas les photos de la base de données Firebase. Il me donne l'erreur: p>

Aucun adaptateur attaché; Sauter la mise en page code> p>

J'ai essayé de nombreuses solutions mais que tous ont échoué. p>

C'est l'activité: p>

package com.example.android.shoftoh1;

import android.content.Context;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.android.shoftoh1.R;
import com.example.android.shoftoh1.Upload;
import com.squareup.picasso.Picasso;

import java.util.List;


// Create the basic adapter extending from RecyclerView.Adapter
// Note that we specify the custom ViewHolder which gives us access to our views
public class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.ImageViewHolder> {

    private Context mContext;
    private List<Upload> mUploads;

    public ImageAdapter(Context context, List<Upload> uploads) {
        mContext = context;
        mUploads = uploads;
    }
    @NonNull
    @Override
        public ImageViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View v = LayoutInflater.from(mContext).inflate(R.layout.image_item, parent, false);
            return new ImageViewHolder(v);
    }

    @Override
        public void onBindViewHolder(ImageViewHolder holder, int position) {
            Upload uploadCurrent = mUploads.get(position);
            holder.textViewName.setText(uploadCurrent.getName());

            Picasso.get()
                    .load(uploadCurrent.getImageUrl())
                    .fit()
                    .centerCrop()
                    .into(holder.imageView);


        }

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

    // Provide a direct reference to each of the views within a data item
    // Used to cache the views within the item layout for fast access
    static class ImageViewHolder  extends RecyclerView.ViewHolder  {
        // Your holder should contain a member variable
        // for any view that will be set as you render a row
        TextView textViewName;
        ImageView imageView;

        // We also create a constructor that accepts the entire item row
        // and does the view lookups to find each subview
        ImageViewHolder(View itemView) {
            // Stores the itemView in a public final member variable that can be used
            // to access the context from any ViewHolder instance.
            super(itemView);

            textViewName = itemView.findViewById(R.id.text_view_name);
            imageView = itemView.findViewById(R.id.image_view_upload);
        }


        }
}