以编程方式设置文本视图的填充

我正在以动态/编程方式向预设的LinearLayout添加textview,但由于某些原因,设置padding不起作用。文本和字体都按预期显示,但填充似乎不起作用。与其他在线解决方案相比,这似乎应该是可行的。我做错什么了?

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

    final CustomItem listItem = listItems.get(position);

    holder.Heading.setText(listItem.getHeading());

    ArrayList<String> directions = listItem.getDirections();
    for(int i = 0; i < directions.size(); i++) {
        TextView step = new TextView(context);
        step.setPadding(20, 20, 0, 20);
        step.setText(directions.get(i));
        step.setTypeface(ResourcesCompat.getFont(context, R.font.lato_light));
        holder.CustomLayout.addView(step);
    }
}

public class ViewHolder extends RecyclerView.ViewHolder{

    public LinearLayout LegLayout;
    public TextView Heading;

    public ViewHolder(View itemView) {
        super(itemView);

        Heading = itemView.findViewById(R.id.heading);
        LegLayout = itemView.findViewById(R.id.directionsLayout);

    }

}