This is a Demo app for the using the Fragment class in Android. It tries to solve the following questions:

1. How to implement a Fragment class?
2. How to implement the communication between a Fragment and an Activity?
3. How to add Fragment dynamically and statically?
4. How to use different layouts in landscape and portrait modes?
5. How to add animations to Fragment transactions?
6. How to allow users press "Back" to get back to the previous Fragment?