How to make HTTPClient work in sync?

Hey guys,

I am currently developing an android mobile application in Titanium Studio 3.2.1 and working with Titanium SDK 3.2.1 on Win 7 Professional x64 machine with JDK 1.7 installed. I am currently testing app with Android 4.2 emulator.

So for the app, I have created a small module which fetches data from a database via a webservice call and this data is used to create tableData which is then passed in app.js during function call, and that table data is used to create a table. Something along this line:

//mymodule1
 
var tableData = [];
 
exports.refreshTableData = function() {
    var url = "http:example.com/webservice/rest/methodpath";
    var json;
    var xhr = Titanium.Network.HTTPClient({
        onload: function(e) {
            json = JSON.parse(this.textResponse);
            for (var i = 0; i < json.length; i++) {
                var row = Ti.UI.createTableViewRow({
                    //...some lines
                    //...
                    });
                tableData.push(row);
                Ti.API.info("2");
            }
            Ti.API.info("3")
        },
        onerror: function(e) {
            Ti.API.info("ERROR: " + e.error);
        }
    });
    Ti.API.info("4");
    xhr.open("GET", url);
    xhr.send();
}
 
exports.fetchTableData = function() {
    return tableData;
}

This is what my app.js is like

//app.js
 
var module1 = require('/lib/mymodule1');
 
var win1 = Ti.UI.createWindow({backgroundColor:'#fff'});
 
var table1 = Ti.UI.createTableView();
Ti.API.info("1");
module1.refreshTableData();
Ti.API.info("5");
var tableData = module1.fetchTableData();
Ti.API.info("6");
table1.setData(tableData);
 
win1.add(table1);
win1.open();

So problem is that table data here is returned empty before httpclient gets chance to retrieve data from database and window stays empty. What I mean is that 1, 4 , 5 and 6 get executed before 2 and 3 does. The fetch function returns even before httpclient onload function has finished. I know that unlike iOS, on Android I can't set async property to false to make it work in proper order. So I want to know is there any workaround for this so I can execute in proper order?

Thanks