MyApplication.java

public class MyApplication extends DaggerApplication {

    @Override
    protected AndroidInjector<? extends DaggerApplication> applicationInjector() {
        AppComponent appComponent = DaggerAppComponent.create();

        BindingComponent bindingComponent = DaggerBindingComponent.builder()
                .appComponent(appComponent)
                .build();
        DataBindingUtil.setDefaultComponent(bindingComponent);

        return appComponent;
    }
}

MyApplication.kt

class MyApplication : DaggerApplication() {

    override fun applicationInjector(): AndroidInjector<out DaggerApplication> {
        val appComponent = DaggerAppComponent.create()

        val bindingComponent = DaggerBindingComponent.builder()
            .appComponent(appComponent)
            .build()
        DataBindingUtil.setDefaultComponent(bindingComponent)

        return appComponent
    }
}