tai-nguyen175/OfflineApp

Offline App

What is an Offline App?

Offline App (or Offline-First App) enables user to seamlessly interact with it by using local device storage and then synchronizing the data with some remote storage (cloud database, etc) later via a background process.

Libraries Used

• Patterns and frameworks
  • MVVM (Model-View-ViewModel) using Google's new Architecture components ViewModel, LiveData, LifecycleObserver, etc.
  • Clean Architecture with ViewModel interacting with UseCases and the latter interacting with local database. Making each layer highly testable.
• Database
  • Room Persistence Library, part of Google's new Architecture components.
• Background Job processing
  • Android Priority JobQueue which uses Job Scheduler for API level Lollipop and above and GcmNetworkManager for API level below Lollipop.
• Remote Call APIs
  • Retrofit 2 to perform HTTP requests.
  • Fake remote database using simple JSONPlaceholder REST API.
• Dependency Injection
  • Dagger Android 2.11 to manage App and Activity-scoped dependencies.
• Communication between app layers
  • RxJava2 and RxAndroid for interacting between ViewModel and local database.
  • RxRelay for publishing requests from the background job so that lifecycle observer components can update local database.
• Other
  • ButterKnife to simplify View and Listener bindings.
  • Travis CI is used for automating continuous integration.
  • The following quality checks are configured: checkstyle, pmd, findbugs, lint and RxLint. You can perform all of them at once by executing ./gradlew check