For adding this dependency Go to Gradle Scripts > adle (Project:app) add the following dependency. First, we will add the classpath to our project-level adle file. Dagger will see those and treat them like regular static fields. Step 2: Adding dependencies In order to use Dagger Hilt, we need to add the dependencies for it. Also, it’s possible to share a ViewModel between multiple fragments and Views, hence you can share data between them.Ī ViewModel must never reference a view, Lifecycle, or any class that may hold a reference to the activity context. Note that select Kotlin as the programming language. Dagger facilitates using DI in your app by creating and managing the graph of dependencies for you. ViewModel uses the observer pattern to provide data for View, so Views can observer ViewModel data to change UI and because of Android Jetpack ViewModel library, it’s lifecycle aware and can hold a large amount of data when UI controller re-created (when rotating or changing configuration) without serialize or deserializing data and it will be cleaned up when scope (Activity or fragment) finished. Dagger is a popular dependency injection library for Java, Kotlin, and Android that is maintained by Google. MVVM abstracts a view’s state and behavior in the same way, but a Presentation Model abstracts a view (creates a view model) in a manner not dependent on a specific user-interface platform. MVVM is a variation of Martin Fowler’s Presentation Model design pattern. ViewModel, unlike Presenter, doesn’t know anything about Views and it never keeps or referenced any instances of View. Instead of Presenter, we have ViewModel here that should extend from ViewModel or AndroidViewModel (which is Context-aware ViewModel). ![]() Just keep the last paragraph in your mind and let’s dive into MVVM pattern.
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