PliWould/app/_layout.tsx

import "react-native-reanimated";
import "react-native-gesture-handler";
import {
  DarkTheme,
  DefaultTheme,
  ThemeProvider,
} from "@react-navigation/native";
import { useFonts } from "expo-font";
import { Stack } from "expo-router";
import * as SplashScreen from "expo-splash-screen";
import { useEffect, useState } from "react";

import { useColorScheme } from "@/hooks/useColorScheme";
import { Appearance, StyleSheet, Text, Pressable } from "react-native";

const isBrowser = typeof window !== "undefined";

// Prevent the splash screen from auto-hiding before asset loading is complete.
SplashScreen.preventAutoHideAsync();

export default function RootLayout() {
  const colorScheme = useColorScheme();
  const [loaded] = useFonts({
    SpaceMono: require("../assets/fonts/SpaceMono-Regular.ttf"),
  });

  function changeTheme() {
    console.debug("Changing color scheme");
    if (Appearance.getColorScheme() === "dark") {
      Appearance.setColorScheme("light");
    } else {
      Appearance.setColorScheme("dark");
    }
  }

  useEffect(() => {
    if (loaded) {
      SplashScreen.hideAsync();
    }
  }, [loaded]);

  if (!loaded) {
    return null;
  }

  return (
    <ThemeProvider value={colorScheme === "dark" ? DarkTheme : DefaultTheme}>
      <Stack>
        <Stack.Screen name="(tabs)" options={{ headerShown: false }} />
        <Stack.Screen name="+not-found" />
      </Stack>
    </ThemeProvider>
  );
}