http://kevin.h-pk-ns.com

cachedImageView.js

/* 
	Developed by Kevin L. Hopkins (http://kevin.h-pk-ns.com)
	You may borrow, steal, use this in any way you feel necessary but please
	leave attribution to me as the source.  If you feel especially grateful,
	give me a linkback from your blog, a shoutout @Devneck on Twitter, or 
	my company profile @ http://wearefound.com.

/* Expects parameters of the directory name you wish to save it under, the url of the remote image, 
   and the Image View Object its being assigned to. */
cachedImageView = function(imageDirectoryName, url, imageViewObject)
{
	// Grab the filename
	var filename = url.split('/');
	filename = filename[filename.length - 1];
	// Try and get the file that has been previously cached
	var file = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, imageDirectoryName, filename);

	if (file.exists()) {
		// If it has been cached, assign the local asset path to the image view object.
		imageViewObject.image = file.nativePath;
	} else {
		// If it hasn't been cached, grab the directory it will be stored in.
		var g = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, imageDirectoryName);
		if (!g.exists()) {
			// If the directory doesn't exist, make it
			g.createDirectory();
		};

		// Create the HTTP client to download the asset.
		var xhr = Ti.Network.createHTTPClient();

		xhr.onload = function() {
			if (xhr.status == 200) {
				// On successful load, take that image file we tried to grab before and 
				// save the remote image data to it.
				file.write(xhr.responseData);
				// Assign the local asset path to the image view object.
				imageViewObject.image = file.nativePath;
			};
		};

		// Issuing a GET request to the remote URL
		xhr.open('GET', url);
		// Finally, sending the request out.
		xhr.send();
	};
};