How to enlarge images android studio

Question

The gallery app. I made my adapter. I want to make it so that when you click on the image, it increases. I found a ready-made code, but it only shows a toast here. As I understand it, something needs to be added in the listener, but I don't know what. What do I need to add in the listener to make the picture bigger?

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import android.media.Image;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.File;
import java.util.ArrayList;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private ArrayList<Cell> galleryList;
    private Context context;
    public ImageView img;

    // Provide a suitable constructor (depends on the kind of dataset)
    public MyAdapter(Context context, ArrayList<Cell> galleryList) {
        this.context = context;
        this.galleryList = galleryList;
    }

    // Create new views (invoked by the layout manager)
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent,
                                         int viewType) {
        // create a new view
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.cell, parent, false);
        return new ViewHolder(view);
    }
    // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(final ViewHolder viewHolder, @SuppressLint("RecyclerView") final int position) {
        // - get element from your dataset at this position
        // - replace the contents of the view with that element
        viewHolder.img.setScaleType(ImageView.ScaleType.CENTER_CROP);
        setImageFromPath(galleryList.get(position).getPath(), viewHolder.img);
        viewHolder.img.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //TODO something can happen if you click on the image
                Toast.makeText(context, "" + galleryList.get(position), Toast.LENGTH_SHORT).show();
            }
        });
    }


    // Provide a reference to the views for each data item
    // Complex data items may need more than one view per item, and
    // you provide access to all the views for a data item in a view holder
    public static class ViewHolder extends RecyclerView.ViewHolder {
        // each data item is just a string in this case
        public ImageView img;

        public ViewHolder(View view) {
            super(view);
            img = view.findViewById(R.id.img);
        }
    }


    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return galleryList.size();
    }

    private void setImageFromPath(String path, ImageView image) {
        File imgFile = new File(path);
        if (imgFile.exists()) {
            Bitmap myBitmap = ImageHelper.decodeSampleBitmapFromPath(imgFile.getAbsolutePath(), 200, 200);
            image.setImageBitmap(myBitmap);
        }
    }
}