feat: Add native module and package for custom functionality

App.tsx

@@ -5,7 +5,7 @@ import {
   StyleSheet,
   Text,
   TouchableOpacity,
-  Alert,
+  Alert, NativeModules
 } from 'react-native';
 import { SafeAreaProvider } from 'react-native-safe-area-context';
 import { useState, useEffect } from 'react';
@@ -14,6 +14,7 @@ import Register from './src/components/Register';
 import { authAPI } from './src/services/authAPI';
 import { networkService } from './src/services/networkService';
 type Screen = 'login' | 'register' | 'home';
+const { MyNativeModule } = NativeModules;
 
 function App() {
   const isDarkMode = useColorScheme() === 'dark';
@@ -25,6 +26,10 @@ function App() {
   // Initialize app
   useEffect(() => {
     initializeApp();
+    console.log("MyNativeModule", MyNativeModule);
+    MyNativeModule.greet("John").then((msg: any) => {
+      console.log(msg);
+    });
 
     // Listen for network changes
     const unsubscribe = networkService.addListener((networkState) => {

android/app/src/main/java/com/lynkeduppro/MainApplication.kt

@@ -10,13 +10,15 @@ import com.facebook.react.defaults.DefaultReactHost.getDefaultReactHost
 class MainApplication : Application(), ReactApplication {
 
   override val reactHost: ReactHost by lazy {
+
+    val packages = PackageList(this).packages.toMutableList()
+
+    // ✅ Add your custom package HERE (Kotlin syntax)
+    packages.add(NativeModulesPackage())
+
     getDefaultReactHost(
       context = applicationContext,
-      packageList =
-        PackageList(this).packages.apply {
-          // Packages that cannot be autolinked yet can be added manually here, for example:
-          // add(MyReactNativePackage())
-        },
+      packageList = packages,
     )
   }
 

android/app/src/main/java/com/lynkeduppro/MyNativeModule.kt

@@ -0,0 +1,19 @@
+package com.lynkeduppro
+
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridge.ReactContextBaseJavaModule
+import com.facebook.react.bridge.ReactMethod
+import com.facebook.react.bridge.Promise
+
+class MyNativeModule(private val reactContext: ReactApplicationContext)
+    : ReactContextBaseJavaModule(reactContext) {
+
+    override fun getName(): String {
+        return "MyNativeModule"   // JS module name
+    }
+
+    @ReactMethod
+    fun greet(name: String, promise: Promise) {
+        promise.resolve("Hello $name from Android(Kotlin)!")
+    }
+}

android/app/src/main/java/com/lynkeduppro/MyNativePackage.kt

@@ -0,0 +1,19 @@
+package com.lynkeduppro
+
+import com.facebook.react.ReactPackage
+import com.facebook.react.bridge.NativeModule
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.uimanager.ViewManager
+
+class NativeModulesPackage : ReactPackage {
+
+    override fun createNativeModules(reactContext: ReactApplicationContext): List<NativeModule> {
+        return listOf(
+            MyNativeModule(reactContext)
+        )
+    }
+
+    override fun createViewManagers(reactContext: ReactApplicationContext): List<ViewManager<*, *>> {
+        return emptyList()
+    }
+}