Activity Indicator

app.js

var ai = require('ui').activityIndicator();
var win = Ti.UI.createWindow();
win.add( ai );
ai._show({message: 'Loading...'});

var xhr = Titanium.Network.createHTTPClient();
xhr.onload = function() {
	ai._hide();	
}
xhr.onerror = function() {
	ai._hide();	
}
xhr.open('GET', 'http://google.com');
xhr.send();

win.open();

ui.js

function isAndroid() {
	return Ti.Platform.osname == 'android';
}

exports.activityIndicator = function() {
	var container;
	
	if (isAndroid()) {
		container = Ti.UI.createActivityIndicator({ color:'#fff' });	
	} else {
		container = Ti.UI.createView({ width: '100%', height: '100%', top: 0, left: 0, visible: false });

		container.add( Ti.UI.createView({ width: '100%', height: '100%', top: 0, left: 0, backgroundColor: '#000', opacity: 0.5, zIndex: 0 }) );
		
		var ai = Ti.UI.createActivityIndicator({ style: Ti.UI.iPhone.ActivityIndicatorStyle.BIG, color:'#fff', zIndex: 100 });
		container.add( ai );
		ai.show();
		ai = null;
	}
	
	container._isShowing = false;
	
	container._show = function(params) {
		if (this._isShowing) {
			return;	
		}
		
		if (isAndroid()) {
			this.message = params.message;
		} else {
			this.children[1].message = params.message;
		}	
		
		if (params.timeout) {
			this._myTimeout = setTimeout(function() {
				exports.manager.get('ai')._hide();

				if (params.timeoutMessage) {
					var alertDialog = Ti.UI.createAlertDialog({
						title: 'Update Timeout',
						message: params.timeoutMessage,
						buttonNames: ['OK']
					});
					alertDialog.show();
				}
			}, params.timeout);	
		}
		
		this._isShowing = true;
		this.show();
	};
	
	container._hide = function() {
		if (this._myTimeout !== undefined) {
			clearTimeout(this._myTimeout);
			delete this._myTimeout;
		}
		if (this._isShowing) {
			this._isShowing = false;
			this.hide();
		}
	}
	
	return container;
};