App.js

import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
import Constants from 'expo-constants'
import Home  from './screens/Home'
import CreateEmployee from './screens/CreateEmployee'
import Profile from './screens/Profile';

import { NavigationContainer } from '@react-navigation/native';
import {createStackNavigator} from '@react-navigation/stack'
import {createStore} from 'redux'
import {Provider} from 'react-redux'
import {reducer} from './reducers/reducer'

const store  = createStore(reducer)


const Stack = createStackNavigator();

const myOptions = {
  title:"Employer App by Sambit Sanyal",
  headerTintColor:"white",
  headerStyle:{
    backgroundColor:"#006aff"
  }
}
function App() {
  return (
  
    <View style={styles.container}>
     
      <Stack.Navigator>
        <Stack.Screen 
        name="Home" 
        component={Home}
         options={myOptions} />
        <Stack.Screen 
         name="Create"
         component={CreateEmployee}
         options={{...myOptions,title:"Create/Update Employee"}} 
         />
        <Stack.Screen
         name="Profile"
         component={Profile}
         options={{...myOptions,title:"Profile"}} 
          />
     </Stack.Navigator>
  
    </View>

  );
}


export default ()=>{
  return (
    <Provider store={store}>
    <NavigationContainer>
      <App />
    </NavigationContainer>
    </Provider>
  )
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#e0e0e0',
  },
});