ReactInstanceManager.kt

// Inside of a Dagger module
@Singleton
@Provides
fun provideReactInstanceManager(context: Context): ReactInstanceManager {
  return ReactInstanceManager.builder()
      .setApplication(HubspotOneApp.get(context))
      .addPackage(MainReactPackage())
      .setUseDeveloperSupport(BuildConfig.DEBUG)
      .setInitialLifecycleState(BEFORE_RESUME)
      .setJSMainModuleName("index.android")
      .setBundleAssetName("index.android.bundle")
      .build()
}

// Then, in an Anvil view:
@Inject
lateinit var reactInstanceManager: ReactInstanceManager

/* ... */

v(ReactRootView::class.java) {
  init {
    Anvil.currentView<ReactRootView>().startReactApplication(reactInstanceManager, "MyComponent", null)
    reactInstanceManager.onHostResume(rootActivity, rootActivity)
  }
}