37 Interactive Technology Team
Nov 21, 2022 · Mobile Development
Red Dot Counter Implementation in a Mobile App
The article explains how to implement a red‑dot badge system in the “玩心部落” mobile app using a tree‑structured RedPoint hierarchy combined with the Observer pattern, where each node tracks its count, notifies UI observers, propagates updates to parent nodes, and is managed centrally by a HeadRedPoint singleton for easy extension.
JavaMobile DevelopmentObserver Pattern
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