EditText SetError 4.0下 不显示文字解决

http://www.eoeandroid.com/forum.php?mod=viewthread&tid=49703

				int ecolor = R.color.black; // whatever color you want
				String estring = "请输入产品的名称";
				ForegroundColorSpan fgcspan = new ForegroundColorSpan(ecolor);
				SpannableStringBuilder ssbuilder = new SpannableStringBuilder(estring);
				ssbuilder.setSpan(fgcspan, 0, estring.length(), 0);
				et_search.requestFocus();
				et_search.setError(ssbuilder);