App.js

import?React,?{Component}?from?'react';
import?Navigation?from?'./app/navigation';
export?default?class?App?extends?Component?{
????render()?{
????????return?(<Navigation?/>)
????}
}

app/navigation/index.js

import?{?createStackNavigator,?createAppContainer?}?from?'react-navigation';
import?HomeScreen?from?'../pages/Home';
import?DetailScreen?from?'../pages/Detail';
const?StackNavigator?=?createStackNavigator({
????Home:?{screen:?HomeScreen},
????Detail:?{screen:?DetailScreen}
})
export?default?createAppContainer(StackNavigator);