Download pdf or jpg file and save it to the device for offline viewing

Save loader content to byte array then send that byte array to FileStream

Something like:

mcLoader = new URLLoader();

mcLoader.dataFormat = URLLoaderDataFormat.BINARY;

var req:URLRequest = new URLRequest (file);        

mcLoader.addEventListener(Event.COMPLETE, contentLoaded);

mcLoader.load (req);

private function contentLoaded(e:Event):void {

var dataContent:ByteArray = new ByteArray();

dataContent = e.target.data;

var fileName:String = "mylocal.pdf"

var f:File = File.applicationStorageDirectory.resolvePath (fileName);

           //save file to local space

            if (f.exists == false) {

                trace ("file doesnt exist. Saving file");

                var fs:FileStream = new FileStream();

                fs.open(f, FileMode.WRITE)

                fs.writeBytes(dataContent);

                fs.close();

                trace ("saved");

            }

}