Android 9 Development Cookbook - Third Edition

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We're only creating a single, simple Fragment in this recipe to teach the fundamentals of Fragments. But this is a good time to point out the power of Fragments. If we are creating multiple Fragments (and usually we are, as that's the point of using Fragments), when creating the Activity Layouts as we did in step 4, we could create different layout configurations using the Android Resource Folders. The portrait layout may have only a single Fragment while the landscape may have two or more. The Master/Detail layout typically uses Fragments, thus only requiring each screen section to be designed and coded once, then included in the layout as appropriate.