텍스트뷰 내에서 글자크기 색깔 등등 바꾸기

SpannableStringBuilder

textview.settext("");

SpannableStringBuilder sp = new SpannableStringBuilder("a" + "\n");

sp.setSpan(new ForegroundColorSpan(Color.rgb(0, 0, 255)), 0, sp.length(),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

sp.setSpan(new AbsoluteSizeSpan(10), 0, sp.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

SpannableStringBuilder sp2 = new SpannableStringBuilder("b");

sp2.setSpan(new ForegroundColorSpan(Color.rgb(255, 0, 0)), 0, sp2.length(),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

sp2.setSpan(new AbsoluteSizeSpan(15), 0, sp2.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

sp.append(sp2);

textview.append(sp);