Mobile Connectivity Suite

Connected

Android connectivity manager with offline-first architecture and intelligent retry.

KotlinAndroidWorkManagerSQLiteRetrofit

Offline Queue

Pending Operations

POST/transactionsP1

PUT/profileP2

GET/balanceP3

User actions queued locally while offline, synced in priority order when connection restored.

1s2s4s8s16s32s

Exponential backoff with ±30% jitter prevents thundering herd

Presentation

ActivityFragmentViewModelLiveData

Domain

ConnectionWatcherRetryPolicySyncEngine

Data

RetrofitOkHttpSQLiteWorkManager

ConnectionWatcher

Monitors network state via NetworkCallback API, publishes changes to subscribers, triggers sync on reconnect.

RetryPolicy

Exponential backoff (2^n) with jitter. Distinguishes retriable (5xx) from permanent (4xx) failures.

OfflineCache

SQLite-backed storage with TTL invalidation. Maintains operation queue for offline actions.

SyncEngine

Coordinates background sync via WorkManager. Priority queue ensures critical operations first.

Offline-First Architecture

Cache-first access provides instant responses. Network requests happen asynchronously in background.

WorkManager over JobScheduler

Backward compatibility to API 14, guaranteed execution, constraint-based scheduling.

Kotlin + Java Hybrid

Core networking in Java for stability, UI and business logic in Kotlin for null safety and coroutines.

Gradle Build Flavors

Dev/staging/prod with different API endpoints, retry configs, and logging levels.

Max Retry Attempts

32s

Max Backoff Delay

±30%

Jitter Range

Build Flavors

"Users don't care about network reliability if the app feels responsive. Show users what they want to see immediately, sync in the background."