Add emitter so I can now send events to the RN core

App.tsx

@@ -1,19 +1,30 @@
-/**
- * Sample React Native App
- * https://github.com/facebook/react-native
- *
- * @format
- */
+import { NewAppScreen } from '@react-native/new-app-screen'
+import { useEffect, useState } from 'react'
+import { StatusBar, Text, StyleSheet, useColorScheme, View } from 'react-native'
+import { NativeEventEmitter, NativeModules } from 'react-native'
+const { Emitter } = NativeModules;
 
-import { NewAppScreen } from '@react-native/new-app-screen';
-import { StatusBar, StyleSheet, useColorScheme, View } from 'react-native';
+export default function App() {
+  const isDarkMode = useColorScheme() === 'dark'
+  const [message, setMessage] = useState(null)
+  
+  useEffect(() => {
+    const emitter = new NativeEventEmitter(Emitter);
+    const subscription = emitter.addListener('onMessage', (event) => {
+      if (event?.message) {
+        setMessage(event.message)
+      }
+    })
 
-function App() {
-  const isDarkMode = useColorScheme() === 'dark';
+    return () => {
+      subscription.remove()
+    };
+  }, [])
 
   return (
     <View style={styles.container}>
       <StatusBar barStyle={isDarkMode ? 'light-content' : 'dark-content'} />
+      <Text>{message ?? 'Waiting for message...'}</Text>
       <NewAppScreen templateFileName="App.tsx" />
     </View>
   );
@@ -23,6 +34,4 @@ const styles = StyleSheet.create({
   container: {
     flex: 1,
   },
-});
-
-export default App;
+})