Step 5. Update the ViewHolder.

step5.java

public class ViewHolder extends RecyclerView.ViewHolder {
    private TextView nameTextView;
    private TextView mobileTextView;
    private TextView landlineTextView;

    public ViewHolder(@NonNull View view) {
        super(view);
        this.nameTextView = (TextView)view
                .findViewById(R.id.name_text_view);
        this.mobileTextView = (TextView)view
                .findViewById(R.id.mobile_text_view);
        this.landlineTextView = (TextView)view
                .findViewById(R.id.landline_text_view);
    }
}