A: 3 - ui/common/BaseActivityModule.java

BaseActivityModule.java

@Module
public abstract class BaseActivityModule {

    static final String ACTIVITY_FRAGMENT_MANAGER = "BaseActivityModule.activityFragmentManager";

    @Binds
    @PerActivity
    abstract Context activityContext(Activity activity);

    @Provides
    @Named(ACTIVITY_FRAGMENT_MANAGER)
    @PerActivity
    static FragmentManager activityFragmentManager(Activity activity) {
        return activity.getFragmentManager();
    }
}