By using the RouteDestination we can redirect the user to different parts of the app without accessing specific UI related resources, keeping the ViewModel free from references to navigation resources and having a single immutable state which is much easier to debug in case of something not working as expected. Using this new approach is easy and adds some advantages like handling the navigation directly from ViewModel. To achieve this we make use of two very simple base classes BaseFragment and BaseViewModelImplĪbstract class BaseFragment > : Fragment (), LifecycleOwner Final words Using the support library, fragments are supported back to all relevant Android versions. What we decided to do is to create some utility functions around state and navigation so it can be managed directly in the ViewModel instead of passing the control back to the Fragment. A Fragment is a combination of an XML layout file and a java class much like an Activity. You’ll find some resource files: strings.xml, activitymain. In the Welcome to Android Studio dialog, select Import project (Eclipse ADT, Gradle, etc.). Use the Download Materials button at the top or bottom of this tutorial to download and extract the Starter Project. Check Navigation - Getting started if you’re unfamiliar with these concepts. Time to get started Getting Started With Android Fragments. Essentially what that means is that in case you navigate to Login graph, Credentials fragment will be the first screen to be shown. For simplicity it only contains two fragments CredentialsFragment and TermsConditionsFragment with the former also being the start destination of this graph.
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