Sample RssFeed App

hi i have added 3 tabs to sampleRSSfeed App and inside every tab i have called MasterView and put object of it inside every tab and i had take the activity from wondow and put it inside the view which call RefreshRss Function . but there is no rss feed appeared . i have added the code of my Application Window which are called in app.js . i use Microsoft Windows 7 and i develop that App For Android .

//Application Window Component Constructor
function ApplicationWindow() {
        var rsspolitics = require('services/rsspolitics'),
        PMasterView = require('ui/common/MasterView'),
        PDetailView = require('ui/common/DetailView');

        var rsssports = require('services/rsssports'),
        SMasterView = require('ui/common/MasterView'),
        SDetailView = require('ui/common/DetailView');

        var rsscommerce = require('services/rsscommerce'),
        CMasterView = require('ui/common/MasterView'),
        CDetailView = require('ui/common/DetailView');


    //create object instance
    var mainwindow = Ti.UI.createWindow({
        title:'self',
        backgroundColor:'#fff',
        exitOnClose:true,
        navBarHidden:false,

    });



    // create Tabs 
     var tabGroup = Titanium.UI.createTabGroup();

        var politicsTab = Titanium.UI.createTab({
            icon:'images/11-clock.png',
            title:'Politics',
            window:mainwindow,
            });

        var sportsTab = Titanium.UI.createTab({
              title:'Sports',
              icon:'images/15-tags.png',
              window:mainwindow,
            });

        var commerceTab = Titanium.UI.createTab({
              title:'Commerce',
              icon:'images/15-tags.png',
              window:mainwindow,
            });

        tabGroup.addTab(sportsTab);  
        tabGroup.addTab(commerceTab);
        tabGroup.addTab(politicsTab); 
        tabGroup.open();


///////////////////////////////// i Guess error are there because  politicsrefreshRSS(); in activity doesn't work in the view like it should be while it work fin if i add it to window.addeventlistner() .///////////////////////////////////

    var politicsView = new PMasterView();
    var actInd = Ti.UI.createActivityIndicator({
        message: 'Loading...',
        color: '#fff',
            activity: {
                onCreateOptionsMenu: function(e) {
                var menu = e.menu;
                var menuItem = menu.add({ title: "Refresh" });
                menuItem.setIcon("images/refresh_icon.png");
                menuItem.addEventListener("click", function(e) {
                        politicsrefreshRSS();
                });
            }
        } 

    });

        var commerceView = new CMasterView();
    var actInd = Ti.UI.createActivityIndicator({
        message: 'Loading...',
        color: '#fff',
            activity: {
                onCreateOptionsMenu: function(e) {
                var menu = e.menu;
                var menuItem = menu.add({ title: "Refresh" });
                menuItem.setIcon("images/refresh_icon.png");
                menuItem.addEventListener("click", function(e) {
                        commercerefreshRSS();
                });
            }
        } 

    });

        var sportsView = new SMasterView();
    var actInd = Ti.UI.createActivityIndicator({
        message: 'Loading...',
        color: '#fff',
            activity: {
                onCreateOptionsMenu: function(e) {
                var menu = e.menu;
                var menuItem = menu.add({ title: "Refresh" });
                menuItem.setIcon("images/refresh_icon.png");
                menuItem.addEventListener("click", function(e) {
                        sportsrefreshRSS();
                });
            }
        } 
    });

    politicsTab.add(politicsView);
    commerceTab.add(sportsView);
    politicsTab.add(commerceView);





    //add behavior for master view
    politicsView.addEventListener('itemSelected', function(e) {
        // Create a detail view window
        var detailView = new DetailView();
        var detailContainerWindow = Ti.UI.createWindow({
            title: 'View Article',
            navBarHidden: false,
            backgroundColor:'#fff'
        });
        detailContainerWindow.add(detailView);

        // Show an activity dialog in the status bar while the article loads
        var pb;
        detailContainerWindow.addEventListener('open', function() {
            pb = Titanium.UI.createActivityIndicator({                                                                                                                                                                                                                                                                      location: Ti.UI.ActivityIndicator.STATUS_BAR,
                type: Ti.UI.ActivityIndicator.DETERMINANT,
                    message:'Loading article...',
            });
            pb.show();
        });
        detailView.addEventListener('articleLoaded', function() {
            pb.hide();
        });

        detailView.showArticle(e.link);

        detailContainerWindow.open();
    });

        sportsView.addEventListener('itemSelected', function(e) {
        // Create a detail view window
        var detailView = new DetailView();
        var detailContainerWindow = Ti.UI.createWindow({
            title: 'View Article',
            navBarHidden: false,
            backgroundColor:'#fff'
        });
        detailContainerWindow.add(detailView);

        // Show an activity dialog in the status bar while the article loads
        var pb;
        detailContainerWindow.addEventListener('open', function() {
            pb = Titanium.UI.createActivityIndicator({                                                                                                                      location: Ti.UI.ActivityIndicator.STATUS_BAR,
                type: Ti.UI.ActivityIndicator.DETERMINANT,
                    message:'Loading article...',
            });
            pb.show();
        });
        detailView.addEventListener('articleLoaded', function() {
            pb.hide();
        });

        detailView.showArticle(e.link);

        detailContainerWindow.open();
    });

        commerceView.addEventListener('itemSelected', function(e) {
        // Create a detail view window
        var detailView = new DetailView();
        var detailContainerWindow = Ti.UI.createWindow({
            title: 'View Article',
            navBarHidden: false,
            backgroundColor:'#fff'
        });
        detailContainerWindow.add(detailView);

        // Show an activity dialog in the status bar while the article loads
        var pb;
        detailContainerWindow.addEventListener('open', function() {
            pb = Titanium.UI.createActivityIndicator({                                                                                                  
                location: Ti.UI.ActivityIndicator.STATUS_BAR,
                type: Ti.UI.ActivityIndicator.DETERMINANT,
                    message:'Loading article...',
            });
            pb.show();
        });
        detailView.addEventListener('articleLoaded', function() {
            pb.hide();
        });

        detailView.showArticle(e.link);

        detailContainerWindow.open();
    });


    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


    function politicsrefreshRSS() {
        alert(11);
        rsspolitics.loadRssFeed({
            start: function() { actInd.show(); },
            error: function() { actInd.hide(); },
            success: function(data) {
                politicsView.refreshRssTable(data);
                actInd.hide();
            }
        });

    }

        function sportsrefreshRSS() {
        rsssports.loadRssFeed({
            start: function() { actInd.show(); },
            error: function() { actInd.hide(); },
            success: function(data) {
                sportsView.refreshRssTable(data);
                actInd.hide();
            }
        });
    }

        function commercerefreshRSS() {
        rsscommerce.loadRssFeed({
            start: function() { actInd.show(); },
            error: function() { actInd.hide(); },
            success: function(data) {
                commerceView.refreshRssTable(data);
                actInd.hide();
            }
        });
    }

    // refresh RSS when ApplicationWindow opens
    tabGroup.addEventListener('focus', function(e)
    {
        setTimeout(function()
        {       
            Ti.API.debug('tab changed to ' + tabGroup.activeTab);        
        },100);
    }); 




    return mainwindow;

};



module.exports = ApplicationWindow;