android - Implement options menu in Fragment Activity -

i have 2 fragment activities , 1 fragment. here's how app logic looks like:

fragmentactivity ==> fragment b ==> fragmentactivity c. 

fragmentactivity parent activity of fragment b , has options menu shows correctly.fragment b contains listview. when list item clicked on fragment b,its details displayed in fragmentactivity c.now want display options menu inside c in actionbar.however, menu displayed after menu button clicked.i want actionbar action.

here code activity c:

public class latestdetailsfragment extends fragmentactivity implements     onitemclicklistener {  public latestdetailsfragment() {     photoimages = new imageitem(); }  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.fragment_latestdetails);      gallery.setonitemclicklistener(this);     // sethasoptionsmenu(true); }       @override public boolean oncreateoptionsmenu(menu menu) {     getmenuinflater().inflate(r.menu.details_fragment_menu, menu);      return super.oncreateoptionsmenu(menu); }  /* *  * called when invalidateoptionsmenu() triggered  */ @override public boolean onprepareoptionsmenu(menu menu) {     return super.onprepareoptionsmenu(menu); }  @override public boolean onoptionsitemselected(menuitem item) {     // handle item selection     switch (item.getitemid()) {     case r.id.contact:         contactownerfragment contactfragment = new contactownerfragment();         bundle bundle = new bundle();         bundle.putstring(key_phone, phone);         contactfragment.setarguments(bundle);         contactfragment.show(getsupportfragmentmanager(), "contact");         return true;     default:         return super.onoptionsitemselected(item);     } } 

and menu:

<menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" tools:context="be.hcpl.android.example.mainactivity" >  <item     android:id="@+id/contact"     android:icon="@drawable/ic_action_call"     android:orderincategory="100"     android:title="@string/contact"     app:showasaction="ifroom|withtext"> </item> 

i cannot use sethasoptionsmenu(true); on activity because raises error,i don't know why. want display icon on actionbar.

you need use menu.clear() before inflating menus.

@override public boolean oncreateoptionsmenu(menu menu) { menu.clear(); getmenuinflater().inflate(r.menu.details_fragment_menu, menu); return super.oncreateoptionsmenu(menu); } 

from documents

public abstract void clear () remove existing items menu, leaving empty if had been created.