Dagger2 multi module

In addition, you might like my recent course about Dependency Injection in Android with Dagger 2. In this case, using The reason here is, we are creating a new instance of We need to share the instance of For that, we will create an interface in our base module like,Now, this interface would be implemented by the Application class which we created in our app module like,In this, we need to return Here, we created the baseComponent variable and returned it from provideBaseComponent function.Now, to share the Here, we created a function provideBaseComponent which takes the context as a parameter. One would be, app: Here app is the package created when creating the project. Dagger2 will actually create the DI graph based on these modules. Using Dagger in our Android project helps us to manage dependencies in a very easy way. We can do this by using the @ElementsIntoSet annotation. It now becomes Map. In our case, that was even more complicated because we were in fact building 4 different apps using the same codebase but that is a different story. Also, we cannot use the @Singleton scope because we would be breaking the second rule. Back then, there was a lot of talking around the subject but no one really focused on how you could use Dagger in a multi-module environment which was one of the main problems I had. ViewModel Dagger Multi-module. raw download clone embed report print Kotlin 1.03 KB @Module. abstract class UsersModule { @Binds After I published the article I got a lot of questions about how I would approach a multi-module project using dagger-android instead. The problem that we now have is that, if we keep using a subcomponent in our feature module, we are then going to have another circular dependency with core because core will need to know about the subcomponent.At this point it just seems a good idea to It is a pretty obvious decision but it took me a while to realize that there was no way to use Dagger in a Let’s remove all the subcomponents then and create a new component in core (If we implement these changes our Remember that we wanted to share the same instance of our ExpensiveObject hence why using Our And similarly our And to use the new components you will have to do something like this in your activities/fragments:But we are again creating the When dealing with component dependencies we must follow 2 simple rules:None of our feature components are scoped but they depend on a scoped component so we are breaking the first rule.

3 min read. In this article I want to explain the approach we ended up taking a year ago and that we are still using. akhbulatov Jul 3rd, 2020 (edited) 1,037 Never Not a member of Pastebin yet? Contribute to MindorksOpenSource/Dagger-Multi-Module-Android development by creating an account on GitHub. How does Dagger know to add it to a Set? Multi-module components; Subcomponents. All providing functions returning specific types will be placed in their own Sets (eg, modules returning Int will be put in a Set and so on).It’s also possible to add multiple elements to our Set at once, instead of adding one at a time. Inside that monolithic app we had our features kind of separated using a In a simplified world the code would look something like this:By doing this, we have access to our ExpensiveObject from all the subcomponents that have What we really have is a circular dependency. Let’s talk about how we can actually implement this. Last month, I went into detail about how to use the recently released Dagger 2 Android modules, and how you can make your injection code much more concise. Note: This article assumes you already know the basics of Dagger. This annotation will tell Dagger to add this String to a generically typed Set, Set. It would also have a module, component, and scope.FeatureTwoComponent would look like,FeatureTwoModule looks like,and as you can see, FeatureTwoComponent is scoped to FeatureTwoScope which looks like,Now, let us setup the Application layer, with MainActivity and its Component and module. An exploration into the Hilt library introduced in Dagger 2.28. Sign Up, it unlocks many cool features! @Component(modules = {AndroidSupportInjectionModule.class, MyActivityModule.class}) interface MyApplicationComponent {} This final step is to include the module in your application component so that it is included in your application graph.

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