Stop Shipping Stale Data: Backend-Driven Cache Updates on Android Caching in Android is not just about storing data — it’s about keeping it fresh. Local storage like SharedPreferences, Room, or …

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A practical guide to implementing backend-driven cache updates on Android using WorkManager. The approach uses HTTP Cache-Control headers (max-age) from the backend to schedule OneTimeWorkRequests that refresh locally cached data (SharedPreferences, Room, etc.) after a server-defined TTL. Key design decisions include per-key worker tagging to prevent conflicts, ExistingWorkPolicy.REPLACE to avoid duplicate updates, and graceful fallback to stale data on API failure. The pattern allows cache lifetimes to be adjusted server-side without shipping a new app version.