Dynamically changing menu options on Android

windowopen.js

// this goes on the open event of your tabgroup
// what happens here is that you create a single function for the menu options of all tabs
// then upon focus of a tab, you call invalidateOptionsMenu, which triggers the onCreateOptionsMenu event
//
if (OS_ANDROID){
  	var tabGroup=Alloy.Globals.tabgroup;

		var activity = tabGroup.getActivity();

		if (activity.actionBar) {
			activity.actionBar.title = "Title";
		}

		activity.onCreateOptionsMenu = function(e) {
			var item, menu;
			menu = e.menu;
			menu.clear();
			
			switch(tabGroup.activeTab.title){
				case 'Schedule':
					item = menu.add({
						title : "Tab1 Item",
						icon : Ti.Android.R.drawable.ic_menu_search,
						showAsAction: Ti.Android.SHOW_AS_ACTION_ALWAYS
					});
					item = menu.add({
						title : "Test",
						showAsAction: Ti.Android.SHOW_AS_ACTION_NEVER
					});
					break;
				case 'Stream':
					item = e.menu.add({
						title : "Share",
						showAsAction : Ti.Android.SHOW_AS_ACTION_ALWAYS,
						icon : Ti.Android.R.drawable.ic_menu_share
					});
					item.addEventListener("click", function(e) {
						var txt = "x";
						var intent = Ti.Android.createIntent({
							action : Ti.Android.ACTION_SEND,
							type : "text/plain"
						});

						intent.putExtra(Ti.Android.EXTRA_TEXT, txt);
						intent.addCategory(Ti.Android.CATEGORY_DEFAULT);
						try {
							Ti.Android.currentActivity.startActivity(intent);
						} catch (ex) {
							Ti.UI.createNotification({
								message : 'WTF dude'
							}).show();
						}
					});
					break;
			}
			// these are common options
			item = menu.add({
				title : "About",
				showAsAction: Ti.Android.SHOW_AS_ACTION_NEVER
			});
			item = menu.add({
				title : "Credits",
				showAsAction: Ti.Android.SHOW_AS_ACTION_NEVER
			});
		}

		tabGroup.addEventListener("focus", function(e) {
			activity.invalidateOptionsMenu();
		});
	}