Titanium Mobile indicator module (iOS only so far)

Indicator.js

var isIndicatorOpen = false,
    view = Ti.UI.createView({
        backgroundColor : "#000",
        borderRadius    : 10,
        opacity         : 0.8
    }),
    // message
    message = Ti.UI.createLabel({
        color  : "#fff",
        width  : "auto",
        height : "auto",
        font   : { fontSize : 14, fontWeight : "bold" },
        bottom : 20
    }),
    // window container
    indicatorWin = Ti.UI.createWindow({
        top   : 0,
        left  : 0,
        right : 0,
        bottom : 0
    }),
    // loading indicator
    activityIndicator = Ti.UI.createActivityIndicator({
        style  : Ti.UI.iPhone.ActivityIndicatorStyle.BIG,
        height : 30,
        width  : 30
    });

view.add(activityIndicator);
view.add(message);
indicatorWin.add(view);

exports.show = function(settings){
    settings = settings || {};
    isIndicatorOpen = true;
    message.text = settings.message || "Loading";
    view.width = settings.width || 150;
    view.height = settings.height || 150;
    view.top = settings.top || null;
    view.bottom = settings.bottom || null;
    view.left = settings.left || null;
    view.right = settings.right || null;
    indicatorWin.open();
    activityIndicator.show();
};

exports.hide = function(){
    isIndicatorOpen = false;
    activityIndicator.hide();
    indicatorWin.close({ opacity : 0, duration : 500 });
};

exports.isOpen = function(){
    return isIndicatorOpen;
};