The drawableLeft (or any of the similar attributes) XML attribute can be modified (removing a drawable in your case) via code using something like this:
yourTextView.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
yourTextView.setText("The Text You Need In There");
The constructor for the method is in this order:
setCompoundDrawablesWithIntrinsicBounds (int left, int top, int right, int bottom)
Read more about the method setCompoundDrawablesWithIntrinsicBounds here