Archi


Source link: https://github.com/ivacf/archi

Archi

This repository showcases and compares different architectural patterns that can be used to build Android apps. The exact same sample app is built three times using the following approaches:

  • Standard Android: traditional approach with layouts, Activities/Fragments and Model.
  • MVP: Model View Presenter.
  • MVVM: Model View ViewModel with data binding.

The App

The sample app displays a list of GitHub public repositories for a given username. Tapping on one of them will open a repository details screen, where more information about the repo can be found. This screen also shows information about the owner of the repository.

Libraries used

  • AppCompat, CardView and RecyclerView
  • Data Binding (only MVVM)
  • RxJava & RxAndroid
  • Retrofit 2
  • Picasso
  • Mockito
  • Robolectric

Standard Android

The /app directoy contains the implementation that follows the traditional standard Android approach. This is a couple of layout files, two Activities and the model. The model is exactly the same for the three implementations and it contains: Repository, User and a retrofit service ( GithubService).

With this approach, Activities are in charge of calling the GithubService, processing the data and updating the views. They act kind of like a controller in MVC but with some extra responsibilities that should be part of the view. The problem with this standard architecture is that Activities and Fragments can become quite large and very difficult to tests. Hence why I didn't write any unit test for this case.

MVP - Model View Presenter

In /app-mvp you will find the sample app implemented following this pattern. When using mvp, Activities and Fragments become part of the view layer and they delegate most of the work to presenters. Each Activity has a matching presenter that handles accessing the model via the GithubService. They also notify the Activities when the data is ready to display. Unit testing presenters becomes very easy by mocking the view layer (Activities).

MVVM - Model View ViewModel

This pattern has recently started to gain popularity due to the release of the data binding library. You will find the implementation in /app-mvvm. In this case, ViewModels retrieve data from the model when requested from the view via data binding. With this pattern, Activities and Fragments become very lightweight. Moreover, writting unit tests becomes easier because the ViewModels are decoupled from the view.

License

Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License. You may obtain a copy of the License at
  http://www.apache.org/licenses/LICENSE-2.0  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. 

Resources

A Simple UIKit for general purposes.

Base repository to demonstrate the process of uploading an aar/jar to JitPack.

Simple modal presenter that can be easily customized. The modal will be shown in the bottom half part of the screen.

Customizable Timeline View for Android, Create a simple timeline list with few lines of code. You can adjust the image, image size, line color and line size.

This Project contains source code of Weather Android Application, designed similar to Yahoo Weather App, Based on World Weather Online.

Meet detekt, a static code analysis tool for the Kotlin programming language. It operates on the abstract syntax tree provided by the Kotlin compiler.

Topics


2D Engines   3D Engines   9-Patch   Action Bars   Activities   ADB   Advertisements   Analytics   Animations   ANR   AOP   API   APK   APT   Architecture   Audio   Autocomplete   Background Processing   Backward Compatibility   Badges   Bar Codes   Benchmarking   Bitmaps   Bluetooth   Blur Effects   Bread Crumbs   BRMS   Browser Extensions   Build Systems   Bundles   Buttons   Caching   Camera   Canvas   Cards   Carousels   Changelog   Checkboxes   Cloud Storages   Color Analysis   Color Pickers   Colors   Comet/Push   Compass Sensors   Conferences   Content Providers   Continuous Integration   Crash Reports   Credit Cards   Credits   CSV   Curl/Flip   Data Binding   Data Generators   Data Structures   Database   Database Browsers   Date &   Debugging   Decompilers   Deep Links   Dependency Injections   Design   Design Patterns   Dex   Dialogs   Distributed Computing   Distribution Platforms   Download Managers   Drawables   Emoji   Emulators   EPUB   Equalizers &   Event Buses   Exception Handling   Face Recognition   Feedback &   File System   File/Directory   Fingerprint   Floating Action   Fonts   Forms   Fragments   FRP   FSM   Functional Programming   Gamepads   Games   Geocaching   Gestures   GIF   Glow Pad   Gradle Plugins   Graphics   Grid Views   Highlighting   HTML   HTTP Mocking   Icons   IDE   IDE Plugins   Image Croppers   Image Loaders   Image Pickers   Image Processing   Image Views   Instrumentation   Intents   Job Schedulers   JSON   Keyboard   Kotlin   Layouts   Library Demos   List View   List Views   Localization   Location   Lock Patterns   Logcat   Logging   Mails   Maps   Markdown   Mathematics   Maven Plugins   MBaaS   Media   Menus   Messaging   MIME   Mobile Web   Native Image   Navigation   NDK   Networking   NFC   NoSQL   Number Pickers   OAuth   Object Mocking   OCR Engines   OpenGL   ORM   Other Pickers   Parallax List   Parcelables   Particle Systems   Password Inputs   PDF   Permissions   Physics Engines   Platforms   Plugin Frameworks   Preferences   Progress Indicators   ProGuard   Properties   Protocol Buffer   Pull To   Purchases   Push/Pull   QR Codes   Quick Return   Radio Buttons   Range Bars   Ratings   Recycler Views   Resources   REST   Ripple Effects   RSS   Screenshots   Scripting   Scroll Views   SDK   Search Inputs   Security   Sensors   Services   Showcase Views   Signatures   Sliding Panels   Snackbars   SOAP   Social Networks   Spannable   Spinners   Splash Screens   SSH   Static Analysis   Status Bars   Styling   SVG   System   Tags   Task Managers   TDD &   Template Engines   Testing   Testing Tools   Text Formatting   Text Views   Text Watchers   Text-to   Toasts   Toolkits For   Tools   Tooltips   Trainings   TV   Twitter   Updaters   USB   User Stories   Utils   Validation   Video   View Adapters   View Pagers   Views   Watch Face   Wearable Data   Wearables   Weather   Web Tools   Web Views   WebRTC   WebSockets   Wheel Widgets   Wi-Fi   Widgets   Windows   Wizards   XML   XMPP   YAML   ZIP Codes