MVP Sample (Model-View-Presenter)

This project demonstrates the use of the MVP (Model-View-Presenter) architectural pattern in Android development.

Structure

The project is organized into the following components:

1. Contract

This interface holds all the contracts (Model, View, Presenter) to define the communication between these components.

• Model: Handles the business logic and data retrieval.

  • OnFinishedListener: A callback to notify the presenter when data is ready.
  • getNewData(onFinishedListener: OnFinishedListener): Fetches new data asynchronously.

• View: Responsible for displaying data and handling UI operations.

  • showProgress(): Displays a progress bar.
  • hideProgress(): Hides the progress bar and shows the text view.
  • setString(newStr: String?): Updates the text view with the fetched data.

• Presenter: Acts as a mediator between Model and View.

  • onButtonClickAction(): Called when the button is clicked; triggers the fetching of new data from the model.
  • onDestroy(): Cleans up any references (if needed) when the view is destroyed.

interface Contract {
    interface Model {
        interface OnFinishedListener {
            fun onFinished(str: String?)
        }

        fun getNewData(onFinishedListener: OnFinishedListener)
    }

    interface View {
        fun showProgress()
        fun hideProgress()
        fun setString(newStr: String?)
    }

    interface Presenter {
        fun onButtonClickAction()
        fun onDestroy()
    }
}