去除Dialog顶部分割线

去除某些Android手机系统上dialog顶部出现的分割线

      Context context = dialog.getContext();
      int divierId = context.getResources().getIdentifier("android:id/titleDivider", null, null);
      View divider = dialog.findViewById(divierId);
      if (divider != null) {
        divider.setBackgroundColor(Color.TRANSPARENT);
      }