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SheTieJun
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android-data-layer

Coordinate Room and Retrofit data sources into a repository-based single source of truth.

8|1|Updated Jun 12, 2018
Search Tags:#repository#offline-first#Flow#Room#Retrofit#Koin
One-click install
npx skills add https://github.com/SheTieJun/BaseKit --skill android-data-layer-shetiejun
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: android-data-layer
Source: https://github.com/SheTieJun/BaseKit/tree/main/.trae/skills/android-data-layer
Command: npx skills add https://github.com/SheTieJun/BaseKit --skill android-data-layer-shetiejun

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps Android developers implement a clean Data Layer using the Repository pattern, Room for local persistence, and Retrofit for remote access, enabling offline-first synchronization and a reliable single source of truth.

Core Features & Use Cases

  • Single Source of Truth via a Repository that decides whether to serve cached data or fetch fresh results.
  • Local Persistence (Room) for offline storage with observable data through Flow-enabled DAOs.
  • Remote Data (Retrofit) for backend communication using suspend functions and robust error handling.
  • Synchronization with stale-while-revalidate strategy and optional outbox approach for resilient writes.
  • DI with Koin to wire dependencies across ViewModels and data sources.

Quick Start

Create a NewsRepository with NewsDao and NewsApi, then call refreshNews() to sync data. Observe newsStream for updated data in your UI via collect or Flow collection.

Frequently Asked Questions about android-data-layer

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I implement an offline-first repository pattern in Android using Room and Retrofit?▼

An offline-first repository coordinates Room persistence and Retrofit calls, using Flow-enabled DAOs to serve local data as a single source of truth while suspend functions fetch remote updates.

What is the stale-while-revalidate strategy for Android data synchronization?▼

Stale-while-revalidate synchronization serves cached Room data immediately via Flow, then triggers Retrofit suspend calls in the background to fetch fresh remote data and update the local database.

How do I wire an offline-first data layer with Koin dependency injection?▼

Koin wires your offline-first data layer by injecting Room DAOs, Retrofit APIs, and the Repository into ViewModels, establishing a single source of truth across your Android app architecture.

Does this offline-first repository approach handle network errors during data synchronization?▼

The repository pattern handles network errors through robust Retrofit suspend call error handling and an optional outbox approach, ensuring resilient local writes and synchronization when connectivity returns.

Can I use Flow-based DAOs to observe Room database changes in an offline-first app?▼

Flow-based DAOs enable offline-first apps to observe Room database changes reactively, allowing the UI to collect updates automatically when the repository syncs fresh data from the remote source.

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