dart – 如何在flutter中实现推送通知

发布时间：2020-12-14 14:57:57 所属栏目：百科来源：网络整理

导读：嗨,我正在尝试实施推送通知,如何显示为通知可以任何一个帮助,我能听,因为我收到通知但我无法看到消息,它出现作为警报,但我想作为通知可以任何一个帮助,在 Android或iOS中我们应该在清单文件和应用程序委托文件中如何在颤动我的代码看起来像这样 class PushM

嗨,我正在尝试实施推送通知,如何显示为通知可以任何一个帮助,我能听,因为我收到通知但我无法看到消息,它出现作为警报,但我想作为通知可以任何一个帮助,在 Android或iOS中我们应该在清单文件和应用程序委托文件中如何在颤动

我的代码看起来像这样

class PushMessagingExample extends StatefulWidget {
 @override
 _PushMessagingExampleState createState() => new _PushMessagingExampleState();
 }

class _PushMessagingExampleState extends State<PushMessagingExample> {
String _homeScreenText = "Waiting for token...";
bool _topicButtonsDisabled = false;

final FirebaseMessaging _firebaseMessaging = new FirebaseMessaging();
final TextEditingController _topicController =
new TextEditingController(text: 'topic');

Future<Null> _showItemDialog(Map<String,dynamic> message) async {
final Item item = _itemForMessage(message);
showDialog<Null>(
    context: context,child: new AlertDialog(
      content: new Text("Item ${message} has been updated"),actions: <Widget>[
        new FlatButton(
            child: const Text('CLOSE'),onPressed: () {
              Navigator.pop(context,false);
            }),new FlatButton(
            child: const Text('SHOW'),true);
            }),],)).then((bool shouldNavigate) {
  if (shouldNavigate == true) {
    _navigateToItemDetail(message);
  }
});
}

 Future<Null> _navigateToItemDetail(Map<String,dynamic> message) async     {
final Item item = _itemForMessage(message);
// Clear away dialogs
Navigator.popUntil(context,(Route<dynamic> route) => route is PageRoute);
if (!item.route.isCurrent) {
  Navigator.push(context,item.route);
}
}

  @override
 void initState() {
  super.initState();
_firebaseMessaging.configure(
  onMessage: (Map<String,dynamic> message) {
    print("onMessage: $message");
    print(message);
    _showItemDialog(message);
  },onLaunch: (Map<String,dynamic> message) {
    print("onLaunch: $message");
    print(message);
    _navigateToItemDetail(message);
  },onResume: (Map<String,dynamic> message) {
    print("onResume: $message");
    print(message);
    _navigateToItemDetail(message);
  },);
_firebaseMessaging.requestNotificationPermissions(
    const IosNotificationSettings(sound: true,badge: true,alert: true));
_firebaseMessaging.onIosSettingsRegistered
    .listen((IosNotificationSettings settings) {
  print("Settings registered: $settings");
});
_firebaseMessaging.getToken().then((String token) {
  assert(token != null);
  setState(() {
    _homeScreenText = "Push Messaging token: $token";
  });
  print(_homeScreenText);
});
}

@override
Widget build(BuildContext context) {
return new Scaffold(


    body: new Material(
      child: new Column(
        children: <Widget>[
          new Center(
            child: new Text(_homeScreenText),),));
  }

  }

解决方法

如果您尝试将消息放在锁定屏幕上,请确保您发送的是“通知”消息类型,而不是将传递给正在运行的应用程序的“数据”消息.您可以在Firebase开发人员指南中了解有关 different types of Firebase messages的更多信息.

（编辑：李大同）

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