snippet.java

public static void setFirstLineBold(TextView tv) {
  String txt = tv.getText().toString();
	Spannable span = new SpannableString(txt);

	int end = txt.indexOf('\n');
	if (end == -1) {
		end = txt.length();
	}

	span.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), 0, end,
			Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

	tv.setText(span);
}