Use liferay's change portrait image in liferay 6.2 GA4 - liferay

Question

i have liferay 6.2 GA4.. i have a question
i want to use liferay's user portrait change, but i dont want to copy all the code to my portlet...
is there a way to call liferay's portrait update from my portlet? just like in a render URL or something like that... call the edit_user_portrait struts action from liferay's my account portlet, and then let liferay do everything else... update the image, show errors, etc...
using this for example: (this is the code in liferay's my account portlet, to call the pop up that updates the portrait)
<portlet:renderURL var="editUserPortraitURL" windowState="<%= LiferayWindowState.POP_UP.toString() %>">
<portlet:param name="struts_action" value="/users_admin/edit_user_portrait" />
<portlet:param name="redirect" value="<%= currentURL %>" />
<portlet:param name="p_u_i_d" value="<%= String.valueOf(selUser.getUserId()) %>" />
<portlet:param name="portrait_id" value="<%= String.valueOf(selUser.getPortraitId()) %>" />
i want something like this, but this is not working... where i tell the portlet name (users admin in this case) where the struts action lives... and let liferay handle the rest..
<liferay-portlet:renderURL portletName="<%=PortletKeys.USERS_ADMIN %>" var="editUserPortraitURL" windowState="<%= LiferayWindowState.POP_UP.toString() %>">
<portlet:param name="struts_action" value="/users_admin/edit_user_portrait" />
<portlet:param name="redirect" value="<%= currentURL %>" />
<portlet:param name="p_u_i_d" value="<%= String.valueOf(selUser.getUserId()) %>" />
<portlet:param name="portrait_id" value="<%= String.valueOf(selUser.getPortraitId()) %>" />
for this i imported the <%# taglib uri="http://liferay.com/tld/portlet" prefix="liferay-portlet"%>
this code gives me a permissions error:
You do not have the roles required to access this portlet.
but i doesnt send any error in the log..
how can i make this work? what im i missing?
thank you!!

Answer 1

i want to use liferay's user portrait change
Using Liferay API you can do this.
InputStream inputStream = new FileInputStream(file);
byte[] bytes = FileUtil.getBytes(inputStream);
UserServiceUtil.updatePortrait(themeDisplay.getUser().getUserId(), bytes);
reference
Thanks.

Answer 2

What I ended up doing is what Saleem suggested in the comments:
<%String editPortraitUrl = themeDisplay.getPortalURL()+"/group/control_panel/manage?p_p_id=2&p_p_lifecy‌​cle=0&p_p_state=pop_up&p_p_mode=view&_2_portrait_id=0&_2_p_u_i_d="+themeDisplay.getUserId()+"&_2_struts_action=%2Fmy_account%2Fedit_user_portrait";
%>
<liferay-ui:logo-selector
currentLogoURL="<%= selUser.getPortraitURL(themeDisplay) %>"
defaultLogoURL="<%= UserConstants.getPortraitURL(themeDisplay.getPathImage(), selUser.isMale(), 0) %>"
editLogoURL="<%=editPortraitUrl %>"
imageId="<%= selUser.getPortraitId() %>"
logoDisplaySelector=".user-logo"/>
Here is a link for reference:
https://www.liferay.com/es/community/forums/-/message_boards/message/57413369