当 flutter android app 处于终止状态时，点击通知调用哪个函数，后台通知点击 FCM

flutter_local_notifications将处理通知中的传入消息。因为无论设置了什么通知通道，都会阻止显示任何 FCM 通知。foregroundFirebase Android SDK

详情请阅读此处：https://firebase.flutter.dev/docs/messaging/notifications#application-in-foreground

在状态下，无需使用本地通知。如果仍使用 To Handle 状态，则会同时收到 2 条通知。teminatedflutter_local_notificationbackground

要处理收到的消息，请阅读以下文档：https://firebase.google.com/docs/cloud-messaging/flutter/receive

• invoke 方法 每次 revice 通知

你可以在这里调用你的方法，如果通知处于终止状态，它将自动调用

@pragma('vm:entry-point')
Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  // If you're going to use other Firebase services in the background, such as Firestore,
  // make sure you call `initializeApp` before using other Firebase services.
  await Firebase.initializeApp();
 /// call you method here <<<<<<<<<<<<<<<<<<<<<<

  print("Handling a background message: ${message.messageId}");
}

void main() {
  FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);
  runApp(MyApp());
}

但是，如果您需要交互，例如，当用户单击处于“已终止”状态的通知时，您希望在特定屏幕中导航，然后阅读以下内容：

• 互动

默认情况下，当我们单击通知时，它将触发打开应用程序。 根据我的项目，我在导航到主屏幕之前使用调用我的方法。splash screen

splash_screen.dart

class SplashScreen extends StatefulWidget {
  const SplashScreen({Key? key}) : super(key: key);

  @override
  _SplashScreenState createState() => _SplashScreenState();
}

class _SplashScreenState extends State<SplashScreen> {

 @override
  void initState() {
    super.initState();
    setupInteractedMessage();
  }


 Future<void> setupInteractedMessage() async {
    // Get any messages which caused the application to open from
    // a terminated state.
    RemoteMessage? initialMessage =
        await FirebaseMessaging.instance.getInitialMessage();

    // If the message also contains a data property with a "type" of "chat",
    // navigate to a chat screen
    if (initialMessage != null) {
      _handleMessage(initialMessage);
    }

    // Also handle any interaction when the app is in the background via a
    // Stream listener
    FirebaseMessaging.onMessageOpenedApp.listen(_handleMessage);
  }

 void _handleMessage(RemoteMessage message) {
    /// Navigate to detail
    String notifType = message.data['type'] ?? '';
      if (notifType == "chatiii"){
          // navigate to specific screen
          Navigator.of(context).pushAndRemoveUntil(
            MaterialPageRoute(
                builder: (context) => const ChatScreen()),
            (Route<dynamic> route) => true);
   }
 }
...

}