Create 2 tabs

app.js

var isAndroid = Ti.Platform.osname == 'android';
// create tab group
var tabGroup = Titanium.UI.createTabGroup();

var indicator = Titanium.UI.createActivityIndicator({
        bottom:10, 
        height:50,
        width:10,
        message:"Cargando..."
});
function showAct() {
    indicator.show();
}

function hideAct() {
    indicator.hide();
}

//
// create base UI tab and root window
//
var win0 = Titanium.UI.createWindow({  
    title:'Window 1',
    backgroundColor:'#fff',
    url:'test.js',
    barColor:'#111'
});
win0.showAct= showAct;
win0.hideAct= hideAct;

var tab0 = Titanium.UI.createTab({  
    title:'Window 1',
    window:win0
});
var win1 = Titanium.UI.createWindow({  
    title:'Window 2',
    backgroundColor:'#fff',
    url:'test.js',
    barColor:'#111'
});
win1.showAct= showAct;
win1.hideAct= hideAct;

var tab1 = Titanium.UI.createTab({  
    title:'Window 1',
    window:win1
});

if (isAndroid) {
    var showIndicator = function(e) {
        showAct();
    };
    win0.addEventListener('open', showIndicator);
    win1.addEventListener('open', showIndicator);
}
//
//  add tabs
//
tabGroup.addTab(tab0);  
tabGroup.addTab(tab1);  

tabGroup.open({
   transition:Titanium.UI.iPhone.AnimationStyle.FLIP_FROM_LEFT
});

test.js

var win = Titanium.UI.currentWindow;
var data = [];
for (i = 0; i < 50; i++) {
        //Ti.API.info("Muestra ----> " + iniciatives[i].title);

        var row = Ti.UI.createTableViewRow({height:100});
        
        var label = Ti.UI.createLabel({
            text: 'title ' + i,
            color: '#111',
            textAlign:'left',
            left:110,
            font:{fontWeight:'bold',fontSize:14},
            width:'auto',
            height:'auto'
        });
        row.add(label);
        
        var photo = Ti.UI.createImageView({
            image: "http://www.appcelerator.com/wp-content/uploads/2009/06/titanium_desk.png",
            top: 10,
            left: 0,
            width:105,
            height:69
        });

        row.add(photo);
        
        data[i] = row;
}
tableview = Titanium.UI.createTableView({
            top:0, left:0, bottom:0, right:0, data: data, backgroundColor:'#fff'});   

Titanium.UI.currentWindow.add(tableview);
win.hideAct();