根据小数展示TextView展示不同大小
private SpannableString changTvSize(String value) {
SpannableString spannableString = new SpannableString(value);
if (value.contains(".")) {
spannableString.setSpan(new RelativeSizeSpan(0.5f), value.indexOf("."), value.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
return spannableString;
}