CharSequence text = “自定義一個萬用字元”;
SpannableStringBuilder builder = new SpannableStringBuilder(text);
String rexgString = “自定義一個萬用字元”;
Pattern pattern = Pattern.compile(rexgString);
Matcher matcher = pattern.matcher(text);
while (matcher.find()) {
builder.setSpan(
new ImageSpan(this, R.drawable.ic_launcher), matcher.start(), matcher
.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}

editText.setHint(builder1);