android - What is the flow like for options menu when we add them in fragment and the main activity? -

i learning android , bit unsure how menu options work.here set have,

i have main activity has fragment inside it. main activity's oncreateoptionsmenu looks this

@override public boolean oncreateoptionsmenu(menu menu) {     // inflate menu; adds items action bar if present.     getmenuinflater().inflate(r.menu.menu_main, menu);     return true; } 

this menu_main.xml has settings button. supposed add refresh button in fragment created new menu xml , added code in fragment class

@override public void oncreate(bundle savedinstancestate) {      super.oncreate(savedinstancestate);     sethasoptionsmenu(true); }  @override public void oncreateoptionsmenu(menu menu, menuinflater inflater) {     inflater.inflate(r.menu.tempfragment, menu); } 

when ran app , did longpress, saw both refresh , setting button.

my question when have menu options main activity , associated fragment, flow like? combine both of menus? can see combining bit unsure regarding how getting handled internally? can explain me?

edit here menu file fragment

<?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto" >  <item android:id="@+id/action_refresh" android:title="action_refresh"     app:showasaction="never"     /> </menu> 

if have mainactivity inflates options menu, menu_main.xml, options menu present on fragment mainactivity creates.

within each fragment code, can create options menus specific fragment. inflate menu_friends.xml in friendsfragment. when instance of friendsfragment created mainactivity, both menu_main.xml and menu_friends.xml shown. can repeat fragments.

edit: @kartheek incorrect answer regarding calling sethasoptionsmenu(true) in fragment cancelling out activity's menu. statement allow menu created fragment. both menus included. see here: calling sethasoptionsmenu(true) fragment results in multiple calls oncreateoptionsmenu in activity