App.js

import { Provider } from 'react-redux';
import { Navigation } from 'react-native-navigation';
import { iconsMap, iconsLoaded } from './app-icons';
import configureStore from './Store/Store';
const store = configureStore()

import { registerScreens } from './Screens';
registerScreens(store, Provider);

module.exports = class App {
  constructor() {
    this.onStoreUpdate = this.onStoreUpdate.bind(this);
    this.unsubscribe = store.subscribe(this.onStoreUpdate);
  }

  onStoreUpdate() {
    const {app: {root, props}, login} = store.getState();

    if (this.currentRoot !== root) {
      this.currentRoot = root;
      this.startApp(this.currentRoot, props);
    }
  }

  startApp(root: String, props) {

    switch (root) {
      case 'login':
        Navigation.startSingleScreenApp({
          screen: {
            screen: 'app.LoginScreen',
            title: 'Login',
            navigatorStyle: {}
          },
          appStyle: {
            titleBarButtonColor: '#FFFFFF'
          },
          animationType: 'none'
        });

        return;
      default:
        console.log('Unknown app root');
    }
  }
}

index.android.js

import { iconsLoaded, iconsMap } from './App/app-icons';

iconsLoaded.then(() => {
  const App = require('./App/App')
  app = new App();
})