Hi Carolina!
You have planned the practically perfect day! After soaring above Pandora, plummeting through the Himalayas to escape a Yeti, and enjoying an African safari, you can eat and shop!
There is a direct, complementary bus from 
Disney's Animal Kingdom to 
Disney Springs. I would allow close to an hour, because buses typically arrive every 20 minutes and the ride is about 20-25 minutes. Animal Kingdom is vast, so allow plenty of walking time to reach the bus stop. 
If you have 
dinner reservations in Disney Springs take advantage of the map on 
My Disney Experience to help you find the restaurant. I find it easy to take a wrong turn in this complex. The app can also help you discover shopping, quick service spots, and the perfect chocolate treat.
Enjoy your wonderful Disney day!
Elisabeth