Add manual activate app

android/src/main/kotlin/id/oddbit/flutter/facebook_app_events/FacebookAppEventsPlugin.kt

@@ -2,6 +2,7 @@ package id.oddbit.flutter.facebook_app_events
 
 import androidx.annotation.NonNull
 
+import android.app.Application
 import android.os.Bundle
 import android.util.Log
 import com.facebook.FacebookSdk
@@ -28,19 +29,25 @@ class FacebookAppEventsPlugin: FlutterPlugin, MethodCallHandler {
 
   private val logTag = "FacebookAppEvents"
 
+  private var application: Application? = null
+
   override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
     channel = MethodChannel(flutterPluginBinding.binaryMessenger, "flutter.oddbit.id/facebook_app_events")
     channel.setMethodCallHandler(this)
+
+    application = flutterPluginBinding.applicationContext.applicationContext as? Application
     appEventsLogger = AppEventsLogger.newLogger(flutterPluginBinding.applicationContext)
     anonymousId = AppEventsLogger.getAnonymousAppDeviceGUID(flutterPluginBinding.applicationContext)
   }
 
   override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
+    application = null
     channel.setMethodCallHandler(null)
   }
 
   override fun onMethodCall(call: MethodCall, result: Result) {
     when (call.method) {
+      "activateApp" -> handleActivateApp(call, result)
       "clearUserData" -> handleClearUserData(call, result)
       "setUserData" -> handleSetUserData(call, result)
       "clearUserID" -> handleClearUserId(call, result)
@@ -59,6 +66,21 @@ class FacebookAppEventsPlugin: FlutterPlugin, MethodCallHandler {
     }
   }
 
+  private fun handleActivateApp(call: MethodCall, result: Result) {
+      val application = this.application
+
+      if (application == null) {
+          result.error("missing_application", "could not activate app: Android application is missing", null)
+          return
+      }
+
+      val applicationId = call.argument("applicationId") as? String
+
+      AppEventsLogger.activateApp(application, applicationId)
+
+      result.success(null)
+  }
+
   private fun handleClearUserData(call: MethodCall, result: Result) {
     AppEventsLogger.clearUserData()
     result.success(null)

ios/facebook_app_events/Sources/facebook_app_events/FacebookAppEventsPlugin.swift

@@ -32,6 +32,8 @@ public class FacebookAppEventsPlugin: NSObject, FlutterPlugin {
 
     public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
         switch call.method {
+        case "activateApp":
+            handleActivateApp(call, result: result)
         case "clearUserData":
             handleClearUserData(call, result: result)
         case "setUserData":
@@ -63,6 +65,17 @@ public class FacebookAppEventsPlugin: NSObject, FlutterPlugin {
         }
     }
 
+    private func handleActivateApp(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+        let arguments = call.arguments as? [String: Any] ?? [:]
+
+        if let applicationId = arguments["applicationId"] as? String, !applicationId.isEmpty {
+            AppEvents.shared.loggingOverrideAppID = applicationId
+        }
+
+        AppEvents.shared.activateApp()
+        result(nil)
+    }
+
     private func handleClearUserData(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
         AppEvents.shared.clearUserData()
         result(nil)

lib/facebook_app_events.dart

@@ -45,6 +45,29 @@ class FacebookAppEvents {
   /// This could be an EAN, article identifier, etc., depending on the nature of the app.
   static const paramNameContentId = "fb_content_id";
 
+  /// Notifies the Facebook SDK that the app has launched ("activate app").
+  ///
+  /// In the default configuration, App Install/App Launch events are logged
+  /// automatically by the native Facebook SDK.
+  ///
+  /// Call this method only if you have disabled or delayed automatic app event
+  /// logging (for example to obtain user consent) and want to log activation
+  /// manually after enabling/initializing the SDK.
+  ///
+  /// If `FacebookAutoLogAppEventsEnabled` (iOS) or
+  /// `com.facebook.sdk.AutoLogAppEventsEnabled` (Android) is set to `false`,
+  /// call this method to log activation and install events manually.
+  ///
+  /// Providing an [applicationId] overrides the application ID used by the
+  /// Facebook SDK on both Android and iOS (with platform-specific behavior).
+  Future<void> activateApp({String? applicationId}) {
+    final args = <String, dynamic>{
+      'applicationId': applicationId,
+    };
+
+    return _channel.invokeMethod<void>('activateApp', _filterOutNulls(args));
+  }
+
   /// Clears the current user data
   Future<void> clearUserData() {
     return _channel.invokeMethod<void>('clearUserData');

test/facebook_app_events_test.dart

@@ -137,4 +137,30 @@ void main() {
       expect(args!.values.any((v) => v == null), isFalse);
     });
   });
+
+  group('Activation', () {
+    test('activateApp sends empty args when null', () async {
+      await facebookAppEvents.activateApp();
+
+      expect(
+        methodCall,
+        isMethodCall(
+          'activateApp',
+          arguments: <String, dynamic>{},
+        ),
+      );
+    });
+
+    test('activateApp forwards applicationId when provided', () async {
+      await facebookAppEvents.activateApp(applicationId: '123');
+
+      expect(
+        methodCall,
+        isMethodCall(
+          'activateApp',
+          arguments: <String, dynamic>{'applicationId': '123'},
+        ),
+      );
+    });
+  });
 }