我的 Flutter 本地通知有一些错误

Question

我需要帮助，调用本地通知时出错。

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(error, Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference, null))”

我已经尝试过文档和 youtube，但我总是收到此错误消息

Answer 1

我遇到过这个问题，就我而言，这是app_icon
您的initState功能中的图标问题，请替换它

 var initializationSettingsAndroid = new AndroidInitializationSettings('app_icon');

有了这个

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

希望这对你有帮助。

Answer 2

这个对我有用，你可以给一个机会

  @override
  initState() {
    super.initState();
to the Android head project
    var initializationSettingsAndroid =
    AndroidInitializationSettings('app_icon');
    var initializationSettingsIOS = IOSInitializationSettings(
        onDidReceiveLocalNotification: onDidReceiveLocalNotification);
    var initializationSettings = InitializationSettings(
        initializationSettingsAndroid, initializationSettingsIOS);
    flutterLocalNotificationsPlugin.initialize(initializationSettings,
        onSelectNotification: onSelectNotification);
  }



  Future<void> _showNotification() async {
    var androidPlatformChannelSpecifics = AndroidNotificationDetails(
        'your channel id', 'your channel name', 'your channel description',
        importance: Importance.Max, priority: Priority.High, ticker: 'ticker');
    var iOSPlatformChannelSpecifics = IOSNotificationDetails();
    var platformChannelSpecifics = NotificationDetails(
        androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);
    await flutterLocalNotificationsPlugin.show(
        0, 'plain title', 'plain body', platformChannelSpecifics,
        payload: 'item x');
  }



 Future<void> onSelectNotification(String payload) async {
    if (payload != null) {
      debugPrint('notification payload: ' + payload);
    }
}