Got a little question here:

When I got a image in my app which I need to download from a server (ftp) to display it, whats the best way to do this?

Downloading images and save them on the device so on next launch you don't need to get it again? OR
Download the image every time? If so where should I save them temporarly or something like this? OR
Can I put in the link as resource when I display a image?

Hope someone can help me again :D BEST COMMUNITY EVER:'(

Greetings Franz