This repository shows how to set up an Android project using Dagger.

Features

• Default dependency injection (DI) setup

checkout master

• DI setup with ViewModel

checkout branch dagger-view-model

• DI setup with networking and Retrofit

checkout branch dagger-retrofit

• DI setup with WorkManager

checkout branch dagger-work-manager

How to add new activity/fragment to DI

Activity:

• Add an activity, implements HasSupportFragmentInjector

class MainActivity : AppCompatActivity(), HasSupportFragmentInjector {

    @Inject
    lateinit var repository: SampleRepository

    @Inject
    lateinit var dispatchingAndroidInjector: DispatchingAndroidInjector<Fragment>

    override fun supportFragmentInjector() = dispatchingAndroidInjector
}

• Register the activity to AndroidInjector in ActivityModule

@ContributesAndroidInjector(modules = [FragmentBuildersModule::class])
abstract fun contributeMainActivity(): MainActivity

Fragment

• Add a fragment, implements Injectable

class MainFragment : Fragment(), Injectable {
}

• Register the fragment in FragmentBuildersModule

@ContributesAndroidInjector
abstract fun contributeMainFragment(): MainFragment

Credit

This project is extracted and modified from GithubBrowserSample.