Cache Remote Images

app.js

var Utils = {
	RemoteImage: function(a){
		a = a || {};
		var md5;
		var needsToSave = false;
		var savedFile;
		if(a.image){
			md5 = Ti.Utils.md5HexDigest(a.image)+'.jpg';
			savedFile = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory,md5);
			if(savedFile.exists()){
				a.image = savedFile;
			} else {
				needsToSave = true;
			}
		}
		
		var image = Ti.UI.createImageView(a);

		if(needsToSave == true){
			function saveImage(e){
				image.removeEventListener('load',saveImage);
				savedFile.write(
					Ti.UI.createImageView({image:image.image,width:'auto',height:'auto'}).toImage()
				);
			};
			image.addEventListener('load',saveImage);
		}
	
		return image;
	}
}

// Example:

var image = Utils.RemoteImage({
	image:'http://lalalal.com/image.jpg',
	width:300,
	height:200,
	top:20
});
win.add(image);

Hi, I made a new gist with a working version of this code, for more general usage that works with callbacks.
https://gist.github.com/decklord/a2284b915dcbf0f6307f

Best Regards.