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Presentation

An architecture for Android as a replacement of MVC.

Why should I use Presentation?

Because you want to have a more readable, testable code.

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

How does it work?

Separation of responsibilities by module:

  • Presenter: get Business Object from the DataProvider and give instructions to the ViewProxy
  • DataProvider: communicate with "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 with a strong reference any of 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 implement this FormDef.IPresenter
  • FormViewProxy that extends BaseDataProvider and implement this FormDef.IDataProvider
  • FormDataProvider that extends BaseViewProxy and implement this FormDef.IView

Go further

Presenter into an Adapter

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

This allow to apply the Presentation pattern to object into an Adapter as well. Your ViewHolder should extends PresenterViewHolder and your Presenter extends BaseItemPresenter.

Proguard

Nothing special needed.

Gradle

dependencies {
    compile 'com.skocken:presentation:0.1'
}

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.

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An architecture for Android as a replacement of MVC.

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