Fragments protect against the unexpected
The true test of user interface flexibility is in how well the user interface design and implementation hold up when encountering an unexpected change request. A well-designed fragment-based user interface allows us to create incredible dynamic user interfaces that can evolve and change with minimal impact on the code. As an example, let's make what could potentially be a major design change on our application.
Currently, the application always shows the book list and description on the same activity. The only difference is whether the fragments are positioned vertically or horizontally relative to one another. Imagine we receive feedback from our users that they don't like the way the app appears when viewed ...
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