我的 Flutter 本地通知出现一些错误

我需要帮助，调用本地通知时出现错误。

对于 initState ：

initState() {
    super.initState();
    flutterLocalNotificationsPlugin = new FlutterLocalNotificationsPlugin();
    // initialise the plugin. app_icon needs to be a added as a drawable resource to the Android head project
    var initializationSettingsAndroid =
        new AndroidInitializationSettings('app_icon');
    var initializationSettingsIOS = new IOSInitializationSettings();
    var initializationSettings = new InitializationSettings(
        initializationSettingsAndroid, initializationSettingsIOS);
    FlutterLocalNotificationsPlugin().initialize(initializationSettings, onSelectNotification: onSelectNotification);
  }

对于函数：

showNotification() async {
    var android = new AndroidNotificationDetails('Channel ID', 'Channel Name', 'channelDescription');
    var iOS = new IOSNotificationDetails();
    var platform = new NotificationDetails(android, iOS);
    await flutterLocalNotificationsPlugin.show(
      0, 'New Notification', 'Flutter Local Notif', platform,payload: 'test notification');
  }

错误是“PlatformException（PlatformException（错误，尝试在空对象引用上调用虚拟方法'int java.lang.Integer.intValue（）'，null））”

我已经尝试过文档和 youtube，但我总是收到此错误消息

我遇到过这个问题，就我而言，这是一个图标问题app_icon
在你的initState函数替换这个

 var initializationSettingsAndroid = new AndroidInitializationSettings('app_icon');

有了这个

 var initializationSettingsAndroid = new AndroidInitializationSettings('@mipmap/ic_launcher');

希望这对您有帮助。