@Singleton public class UserRepository { // ... } @Singleton @Component(modules = {UserModule.class}) public interface AppComponent { UserRepository provideUserRepository(); // ... } @ActivityScoped @Component(dependencies = AppComponent.class, modules = {UserModule.class}) public interface ActivityComponent { void inject(MainActivity activity); // ... } public class MainActivity extends AppCompatActivity { @Inject UserRepository userRepository; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ActivityComponent component = DaggerActivityComponent.builder() .appComponent(((MyApplication) getApplication()).getAppComponent()) .build(); component.inject(this); } }