直接看代码
String hintStr = "请输入相关信息";SpannableString ss = new SpannableString(hintStr);AbsoluteSizeSpan ass = new AbsoluteSizeSpan(14, true);ss.setSpan(ass, 0, ss.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);leaveLong.setHint(new SpannedString(ss));
看下效果图: