expo-app-background-image.tsx

import React, { useState, useEffect } from 'react';
import { View, Text, Image, AppState } from 'react-native';

const App = () => {
  const [appState, setAppState] = useState(AppState.currentState);
  const [isAppBackgrounded, setIsAppBackgrounded] = useState(false);

  useEffect(() => {
    const subscription = AppState.addEventListener("change", nextAppState => {
      setAppState(nextAppState);
      setIsAppBackgrounded(nextAppState === 'background');
    });

    return () => {
      subscription.remove();
    };
  }, []);

  const renderContent = () => {
    if (isAppBackgrounded) {
      // Render a placeholder or branding image when the app is in the background
      return <Image source={require('./path-to-your-placeholder-image.png')} />;
    } else {
      // Render the normal app content when it is in the foreground
      return (
        <View>
          <Text>Welcome to the app!</Text>
          {/* Rest of your app UI */}
        </View>
      );
    }
  };

  return (
    <View style={{ flex: 1 }}>
      {renderContent()}
    </View>
  );
};

export default App;