当应用在Flutter-Android中处于前台时，UI在接收到推送通知时崩溃

Question

我正在使用FCM。我正在尝试在我的应用程序处于前台时显示通知。 我已成功收到通知，但应用程序在收到通知后崩溃。

void initState() {

//TODO: Local notifications configuration.
var initializationSettingsAndroid = AndroidInitializationSettings('notification_icon');
var initializationSettingsIOS = IOSInitializationSettings();
var initializationSettings = InitializationSettings(initializationSettingsAndroid,initializationSettingsIOS);

Future selectNotification(String payload) async {
  print('Showing alert');
  showDialog(context: context,builder: (_)=>AlertDialog(title: Text("Title"),));
}



FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();

flutterLocalNotificationsPlugin.initialize（initializationSettings，onSelectNotification：selectNotification）;

Future showNotifications() async {
  print('show');
  var androidPlatformSpecifics = AndroidNotificationDetails('123','Channel Name','Description about the channel',importance: Importance.Max,priority: Priority.Default);
  var iOSPlatformSpecifics = IOSNotificationDetails();
  var platformChannelSpecifics = NotificationDetails(androidPlatformSpecifics,iOSPlatformSpecifics);
  await flutterLocalNotificationsPlugin.show(0, 'New Post', 'Notification', platformChannelSpecifics);
  print('show');


}

//TODO:Configuration of firebase
_firebaseMessaging.configure(
  onMessage: (Map<String,dynamic> message){
    debugPrint('on');
    showNotifications();
    print(message);
  },
  onResume: (Map<String,dynamic> message){
    debugPrint('resume');
    print(message);
  },
  onLaunch: (Map<String,dynamic> message){
    debugPrint('Launch');
    print(message);
  },

);

_firebaseMessaging.getToken().then((token){
  print(token);
});

推送通知后，我不断收到“系统用户界面已停止”