Different sizes in the same TextView while keep their style.

gistfile1.java

String text = "R$ 2.086,01"
String pathern = ",";

int start = text.lastIndexOf(pathern);
int end = ((text.length()) - start);

final SpannableString span = new SpannableString(text);
span.setSpan(new RelativeSizeSpan(0.5f), start, (start + end), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
someTextView.setText(span);