index.android.js

import { Navigation } from 'react-native-navigation';

import { registerScreens } from './screens';

registerScreens(); 

Navigation.startSingleScreenApp({
  screen: {
    navBarHidden:true,
    screen: 'idcms.LoginScreen', // unique ID registered with Navigation.registerScreen
    navigatorStyle: {}, // override the navigator style for the screen, see "Styling the navigator" below (optional)
    navigatorButtons: {} // override the nav buttons for the screen, see "Adding buttons to the navigator" below (optional)
  },
});