Communication patterns for application components

Activities, services, fragments, helper classes etc. are main components of Android applications but its tricky to establish communication between these components. It’s tricky when one cares about writing reusable code – loosely coupled, plug-n-play-able. The goal here is to avoid tight coupling.

Tight coupling - Components keep references of each other and call methods on them directly. In the code below, we are keeping a reference of MagazineActivity inside MenuFragment. So, MenuFragment is tightly coupled with MagazineActivity i.e., it cannot function without MagazineActivity.

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