How to evenly space ImageViews?

Is there an east way for me to have these three imageViews evenly spaced horizontally? I'm having a hard time figuring this out and my app is being deployed for multiple platforms so I was trying to avoid hard coding anything.

Here is my code

var toolBarView = Titanium.UI.createView({
    bottom:0,
    height:'50',
    width:Titanium.Platform.displayCaps.platformWidth,
    layout:'horizontal',
    //backgroundColor:'#777'
});
 
var buttonFacebook = Ti.UI.createImageView({
    image: '/HTML/images/facebook.png',
    top:'5'
});
var buttonTwitter = Ti.UI.createImageView({
    image: '/HTML/images/twitter.png',
    top:'5'
});
var buttonPintrest= Ti.UI.createImageView({
    image: '/HTML/images/pinterest.png',
    top:'5'
});