import React from 'react' ; import { View , StyleSheet , Text } from 'react-native' ; export const HEADER_HEIGHT = 50 ; export function AppHeader ( ) { return ( < View style = { styles . header } > < Text > Big Calendar < /Text> < /View>); } const styles = StyleSheet . create ( { header : { height : HEADER_HEIGHT , padding : 16 , alignItems : 'center' , justifyContent : 'center' , } , } ) ;