App.js

import React from 'react'

import { NavigationContainer } from '@react-navigation/native'
import { createStackNavigator } from '@react-navigation/stack'

import MapScreen from './screens/MapScreen'
import AddMarkScreen from './screens/AddMarkScreen'

const Stack = createStackNavigator()

export default function App() {
  return (
    <NavigationContainer>
      <Stack.Navigator>
        <Stack.Screen name="MapScreen" component={MapScreen} options={{ title: 'Mapa' }} />
        <Stack.Screen
          name="AddMarkScreen"
          component={AddMarkScreen}
          options={{ title: 'Adicionar Marcador' }}
        />
      </Stack.Navigator>
    </NavigationContainer>
  )
}