android - How to edit the list in the right up corner that contains settings? -
    i tried       @override     public boolean oncreateoptionsmenu(menu menu) {         log.v(                 this.getclass().getname() + "!!!",                  new exception().getstacktrace()[0].getmethodname()                 );         menuitem m_item = (menuitem)menu.finditem(r.id.action_settings);         if(m_item != null)             m_item.settitle("back test");         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.settings, menu);         return true;     }   but gets null.and also,oncreate seems have null well. there function can modify text on during runtime??? , if so, there easy way find it?          you should add items in menu xml. can find on folder res/menu . there have menus available inflation.   i suppose have one. how added options:   <?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="htt...