theonlyanil

// OnCreate
{
    ...
ItemTouchHelper.SimpleCallback simpleCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
        @Override
        public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
            return false;
        }

        @Override

theonlyanil

private final static int NUM_GRIDS = 2;

...
    
 @Override
    protected void onCreate(Bundle savedInstanceState) {

    // set the layout manager.
    GridLayoutManager layoutManager;
    layoutManager = new GridLayoutManager(this, NUM_GRIDS);

theonlyanil

@Override
        public void onBindViewHolder(final ViewHolder holder, final int position) {

            ...

            // Load more - Endless Scrolling
            if(position == this.getItemCount() - 1)
            {
                // Add a progress bar.
                ProgressBar progressBar = new ProgressBar(context);

theonlyanil

    /* Changes start from here... */
    public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
    {
        // each data item is just a string in this case
        public TextView mTextView;
        public ViewHolder(View itemView) {
            super(itemView);
            itemView.setOnClickListener(this);
            mTextView = itemView.findViewById(R.id.textView);
        }