Presentation


Source link: https://github.com/StanKocken/Presentation

Presentation

An architecture for Android as a replacement of MVC.

Why should I use Presentation?

Because you want to have more readable, testable code.

Avoid "God Objects", mainly your Activities or Fragments.

How does it work?

Separation of responsibilities by module:

  • Presenter: Get a Business Object from the DataProvider and give instructions to the ViewProxy
  • DataProvider: Communicate with the "outside" to set and get the data, following the instructions of the Presenter
  • ViewProxy: Convert Presenter instructions and set values to Android Views.

Architecture

Leak safe. Don't hold a strong reference to the DataProvider, Presenter, or ViewProxy.

Sample

The goal is to make this application:

Each public method of the modules are defined into an interface:

public interface FormDef {

interface IPresenter extends Base.IPresenter {

 void onClickSaveButton(String value);

  
}

interface IDataProvider extends Base.IDataProvider {

 String getValueSaved();

 void saveValue(String value);

  
}

interface IView extends Base.IView {

 void setValueSaved(String text);

  
}
  
}
 

Then you have your:

  • FormPresenter that extends BasePresenter and implements FormDef.IPresenter
  • FormDataProvider that extends BaseDataProvider and implements FormDef.IDataProvider
  • FormViewProxy that extends BaseViewProxy and implements FormDef.IView

Go further

Presenter into an Adapter

This library has a dependency on Efficient Adapter to use the same view cache mechanism.

This allows to apply the Presentation pattern to object in an Adapter as well. Your ViewHolder should extend PresenterViewHolder and your Presenter should extend BaseItemPresenter.

Let your Presenter by Lifecycle aware

Thanks to the Android Architecture Components, your Presenter can be aware of the lifecycle of the linked Activity or Fragment.

It will be automatically registered/unregistered if your Presenter implements LifecycleObserver, if it extends BasePresenter.

Then you can add the annotation @OnLifecycleEvent for the state you want to listen.

Example:

public class MyPresenter extends BasePresenter<MyDef.IDataProvider, MyDef.IView>

implements MyDef.IPresenter, LifecycleObserver {

...

@OnLifecycleEvent(Lifecycle.Event.ON_START)
  void onStart() {

// do whatever when the
  
}
  
}
 

Proguard

Nothing special needed.

Gradle

dependencies {

  compile 'com.skocken:presentation:2.0.0' 
}
 

License

Contributing

Please fork this repository and contribute back using pull requests.

Any contributions, large or small, major features, bug fixes, unit/integration tests are welcomed and appreciated but will be thoroughly reviewed and discussed.

Resources

A view to draw Bezier curves.

A simple wheel view for Android.

An Android library to make thumbs +1 effect. It supports text and images.

A pretty Music Player demo created by Anish Chandran and coded by André Mion

VirtualApp is an open platform for Android that allows you to create a Virtual Space, you can install and run apk inside. Beyond that, VirtualApp is also a Plugin Framework.

Cosmos Browser allows the user to connect to the internet through the use of SMS. No data or WiFi required.

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