[core] add reloadAppAsync support

apps/native-component-list/src/navigation/ExpoApisStackNavigator.tsx

@@ -16,6 +16,12 @@ export const Screens = [
     },
     name: 'ExpoModules',
   },
+  {
+    getComponent() {
+      return optionalRequire(() => require('../screens/ExpoCoreModuleScreen'));
+    },
+    name: 'ExpoCoreModule',
+  },
   {
     getComponent() {
       return optionalRequire(() => require('../screens/StatusBarScreen'));

apps/native-component-list/src/screens/ExpoApisScreen.tsx

@@ -49,6 +49,7 @@ const screens = [
   'FileSystem',
   'Font',
   'Errors',
+  'ExpoCoreModule',
   'ExpoModules',
   'Geocoding',
   'Haptics',

apps/native-component-list/src/screens/ExpoCoreModuleScreen.tsx

@@ -0,0 +1,23 @@
+import { reloadAppAsync } from 'expo';
+import { ScrollView, StyleSheet } from 'react-native';
+
+import ListButton from '../components/ListButton';
+
+export default function ExpoCoreModuleScreen() {
+  return (
+    <ScrollView style={styles.scrollView}>
+      <ListButton
+        title="reloadAppAsync"
+        onPress={() => {
+          reloadAppAsync('Reload from ExpoCoreModuleScreen');
+        }}
+      />
+    </ScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  scrollView: {
+    padding: 10,
+  },
+});

packages/expo-modules-core/CHANGELOG.md

@@ -6,6 +6,8 @@
 
 ### 🎉 New features
 
+- Introduced the `reloadAppAsync` to reload the app. ([#28400](https://github.com/expo/expo/pull/28400) by [@kudo](https://github.com/kudo))
+
 ### 🐛 Bug fixes
 
 ### 💡 Others

packages/expo-modules-core/android/src/main/java/expo/modules/kotlin/defaultmodules/CoreModule.kt

@@ -1,5 +1,10 @@
 package expo.modules.kotlin.defaultmodules
 
+import com.facebook.react.ReactActivity
+import com.facebook.react.ReactDelegate
+import com.facebook.react.bridge.UiThreadUtil
+import com.facebook.react.config.ReactFeatureFlags
+import com.facebook.react.devsupport.DisabledDevSupportManager
 import expo.modules.kotlin.events.normalizeEventName
 import expo.modules.kotlin.modules.Module
 import expo.modules.kotlin.modules.ModuleDefinition
@@ -50,5 +55,30 @@ class CoreModule : Module() {
         "directEventTypes" to directEventTypes
       )
     }
+
+    AsyncFunction("reloadAppAsync") { _: String ->
+      val reactActivity = appContext.currentActivity as? ReactActivity ?: return@AsyncFunction
+
+      // TODO(kudo): Use ReactActivity.getReactDelegate() after react-native 0.74.1
+      // reactActivity.getReactDelegate()
+      val reactActivityDelegateField = ReactActivity::class.java.getDeclaredField("mDelegate")
+        .apply { isAccessible = true }
+      val reactActivityDelegate = reactActivityDelegateField[reactActivity]
+      val getReactDelegateMethod = reactActivityDelegate.javaClass.getDeclaredMethod("getReactDelegate")
+        .apply { isAccessible = true }
+      val reactDelegate = getReactDelegateMethod.invoke(reactActivityDelegate) as? ReactDelegate
+        ?: return@AsyncFunction
+      if (!ReactFeatureFlags.enableBridgelessArchitecture) {
+        val reactInstanceManager = reactDelegate.reactInstanceManager
+        if (reactInstanceManager.devSupportManager is DisabledDevSupportManager) {
+          UiThreadUtil.runOnUiThread {
+            reactInstanceManager.recreateReactContextInBackground()
+          }
+          return@AsyncFunction
+        }
+      }
+
+      reactDelegate.reload()
+    }
   }
 }