What is presenter in MVP in Android?

What is presenter in MVP in Android?

Model–view–presenter (MVP) is a derivation of the model–view–controller (MVC) architectural pattern which mostly used for building user interfaces. In MVP, the presenter assumes the functionality of the “middle-man”. In MVP, all presentation logic is pushed to the presenter.

How do I use MVP on Android?

Example of MVP Architecture

1. Step 1: Create a new project. Click on File, then New => New Project. Choose Empty activity. Select language as Java/Kotlin. Select the minimum SDK as per your need.
2. Step 2: Modify String.xml file. All the strings which are used in the activity are listed in this file. XML.

Should I use activities or fragments?

Fragment cannot be used without an Activity. While Using fragments in the project, the project structure will be good and we can handle it easily. Lifecycle methods are hosted by OS. The activity has its own life cycle.

Is activity a fragment?

A Fragment represents a reusable portion of your app’s UI. A fragment defines and manages its own layout, has its own lifecycle, and can handle its own input events. Fragments cannot live on their own–they must be hosted by an activity or another fragment.

Do you need MVP for activity with multiple fragments?

The activity/fragments should be considered as just the view in the MVP model. This means that they should just show data and receive user interactions. It is ok to communicate activity and fragments via interface/callbacks. But, it is not an activity/fragment responsibility to call the API services.

How to create an activity with multiple fragments?

The activity/fragment has to implement an interface exposed by the presenter, and the presenter holds a weak reference of this interface, so that it can callback.

How is a presenter created in an activity?

Usually, the presenter is created or injected into the activity/fragment. The activity/fragment has to implement an interface exposed by the presenter, and the presenter holds a weak reference of this interface, so that it can callback.

Is it OK to show data with fragments?

This means that they should just show data and receive user interactions. It is ok to communicate activity and fragments via interface/callbacks. But, it is not an activity/fragment responsibility to call the API services. The presenter should be responsible to call the api services.