Can move the image to SDcard when install the android apps?

Just like the "Angry Bird", the apps is up to 10MB when downloaded form market After installation, the apps will only remain around 1.92MB (Seen form Setting --> Applications --> Manage Application)

Why they can do that? My apps have many picture, it makes the file very开发者_JS百科 large, I want all picture auto move to SDcard when install the apps.

Many Thanks!

That's not possible. Maybe they download the images from internet once the app is installed, that's a common technique.