Android Menu Dynamic Change "Add or remove"

<Menuxmlns:android= "Http://schemas.android.com/apk/res/android">    <GroupAndroid:id= "@+id/menu_items">        <ItemAndroid:id= "@+id/menu_item_night_mode"Android:title= "@string/menu_item_night_mode"Android:icon= "@android:d rawable/ic_menu_preferences"/>        <ItemAndroid:id= "@+id/menu_item_settings"Android:title= "@string/menu_item_settings"Android:icon= "@android:d rawable/ic_menu_preferences"/>        <ItemAndroid:id= "@+id/menu_item_help"Android:title= "@string/menu_item_help"Android:icon= "@android:d rawable/ic_menu_preferences"/>    </Group></Menu>

@Override Public BooleanOncreateoptionsmenu (Menu menu) {//We only have want to show it as a menu in landscape, and only for clock/alarm fragment.Mmenu =menu; //Direction Level        if(Getresources (). GetConfiguration (). Orientation = =Configuration.orientation_landscape) {            if(Mactionbar.getselectednavigationindex () = = Alarm_tab_index | |Mactionbar.getselectednavigationindex ()==Clock_tab_index) {                //Clear The menu so it doesn ' t get duplicate items in case Oncreateoptionsmenu//Was called multiple times.menu.clear ();                Getmenuinflater (). Inflate (R.menu.desk_clock_menu, menu); MenuItem Nightmode=Menu.finditem (R.id.menu_item_night_mode); MenuItem Help=Menu.finditem (R.ID.MENU_ITEM_HELP); if(Mactionbar.getselectednavigationindex () = =Alarm_tab_index) {nightmode.setvisible (false); Help.setvisible (false); } Else if(Mactionbar.getselectednavigationindex () = =Clock_tab_index) {nightmode.setvisible (true); Help.setvisible (false); }            }            //Always return true to landscape, regardless of whether we ve inflated the menu, so//That's when we switch tabs This method would get called and we can inflate the menu.            return true; }        return false; } @Override Public BooleanOnprepareoptionsmenu (Menu menu) {updatemenu (menu); return true; }    Private voidUpdatemenu (Menu menu) {//Hide "Help" If we don has a URI for it.MenuItem help =Menu.finditem (R.ID.MENU_ITEM_HELP); if(Help! =NULL) {Utils.preparehelpmenuitem ( This, help); }        //Hide ' Lights Out ' for timer.MenuItem Nightmode =Menu.finditem (R.id.menu_item_night_mode); if(Mactionbar.getselectednavigationindex () = =Alarm_tab_index) {nightmode.setvisible (false); } Else if(Mactionbar.getselectednavigationindex () = =Clock_tab_index) {nightmode.setvisible (true); }} @Override Public Booleanonoptionsitemselected (MenuItem item) {if(Processmenuclick (item)) {return true; }        return Super. onoptionsitemselected (item); }    Private BooleanProcessmenuclick (MenuItem item) {Switch(Item.getitemid ()) { Caser.id.menu_item_settings:startactivity (NewIntent (Deskclock. This, Settingsactivity.class)); return true;  Caser.id.menu_item_help:intent i=item.getintent (); if(I! =NULL) {                    Try{startactivity (i); } Catch(activitynotfoundexception e) {//No activity found to match the Intent-ignore                    }                }                return true;  Caser.id.menu_item_night_mode:startactivity (NewIntent (Deskclock. This, Screensaveractivity.class)); default:                 Break; }        return true; }

Android Menu Dynamic Change "Add or remove"