收到来自 FirebaseMessaging 的通知，但 OnMessage() 内的打印功能不起作用

Question

我正在 AndroidStudio 中处理 flutter 项目，在接收来自 firebase 消息传递的通知时无法打印通知内容。这是我的 main.dart 和 homePage 的代码

main.dart代码：

void main()async
{
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}
class MyApp extends StatelessWidget
{

  const ConnectionPage({Key key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return
     MaterialApp
            (
              title: "HomeHero",
              theme: ThemeData
                (
                primaryColor: Colors.white,
                backgroundColor: Colors.white,
              ),
          home: homePage(),
    );
   );
  }
}

首页代码：

 class homePage extends StatefulWidget {

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

class _homePage extends State<homePage> 
{
  void iniState() {
    super.initState();
    FirebaseMessaging.instance.getInitialMessage();
    FirebaseMessaging.onMessage.listen((message) {
      print(message.notification.body);
      print(message.notification.title);
    });

}

输出：

D/FLTFireMsgReceiver(23787): broadcast received for message
W/e.providers_ap(23787): Accessing hidden method Landroid/os/WorkSource;->add(I)Z (unsupported,test-api, reflection, allowed)
W/e.providers_ap(23787): Accessing hidden method Landroid/os/WorkSource;->add(ILjava/lang/String;)Z (unsupported,test-api, reflection, allowed)
W/e.providers_ap(23787): Accessing hidden method Landroid/os/WorkSource;->get(I)I (unsupported, reflection, allowed)
W/e.providers_ap(23787): Accessing hidden method Landroid/os/WorkSource;->getName(I)Ljava/lang/String; (unsupported, reflection, allowed)

日志猫：

2022-03-22 14:14:20.150 23787-23787/com.example.providers_app D/FLTFireMsgReceiver: broadcast received for message
2022-03-22 14:14:20.193 23787-23920/com.example.providers_app W/e.providers_ap: Accessing hidden method Landroid/os/WorkSource;->add(I)Z (unsupported,test-api, reflection, allowed)
2022-03-22 14:14:20.193 23787-23920/com.example.providers_app W/e.providers_ap: Accessing hidden method Landroid/os/WorkSource;->add(ILjava/lang/String;)Z (unsupported,test-api, reflection, allowed)
2022-03-22 14:14:20.193 23787-23920/com.example.providers_app W/e.providers_ap: Accessing hidden method Landroid/os/WorkSource;->get(I)I (unsupported, reflection, allowed)
2022-03-22 14:14:20.194 23787-23920/com.example.providers_app W/e.providers_ap: Accessing hidden method Landroid/os/WorkSource;->getName(I)Ljava/lang/String; (unsupported, reflection, allowed)

另一件事要提的是，当我创建一个新项目只是为了在接收通知时测试打印功能时，它可以工作（重写所有代码）。但是当我从项目中复制所有无法运行打印功能的lib文件并将其粘贴到新创建的项目的lib中时，它再次失败。

我重写项目的代码：

void main()async
{
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();

  runApp(ConnectionPage());
}

class ConnectionPage extends StatelessWidget
{
  const ConnectionPage({Key key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return
      MaterialApp
          (
          title: "HomeHero",
          theme: ThemeData
            (
            primaryColor: Colors.white,
            backgroundColor: Colors.white,
          ),
        home: MyHomePage(),

        );

  }

我的主页代码：

class MyHomePage extends StatefulWidget {
  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    FirebaseMessaging.instance.getInitialMessage();
    FirebaseMessaging.onMessage.listen((message) {
      print(message.notification.body);
      print(message.notification.title);
    });
  }
}

这是重写项目的输出：

D/FLTFireMsgReceiver(24304): broadcast received for message
W/ication_testin(24304): Accessing hidden method Landroid/os/WorkSource;->add(I)Z (unsupported,test-api, reflection, allowed)
W/ication_testin(24304): Accessing hidden method Landroid/os/WorkSource;->add(ILjava/lang/String;)Z (unsupported,test-api, reflection, allowed)
W/ication_testin(24304): Accessing hidden method Landroid/os/WorkSource;->get(I)I (unsupported, reflection, allowed)
W/ication_testin(24304): Accessing hidden method Landroid/os/WorkSource;->getName(I)Ljava/lang/String; (unsupported, reflection, allowed)
I/flutter (24304): Notification Testing
I/flutter (24304): Testing

日志猫：

2022-03-22 14:45:04.205 24304-24304/com.example.notification_testing D/FLTFireMsgReceiver: broadcast received for message
2022-03-22 14:45:04.263 24304-24400/com.example.notification_testing W/ication_testin: Accessing hidden method Landroid/os/WorkSource;->add(I)Z (unsupported,test-api, reflection, allowed)
2022-03-22 14:45:04.263 24304-24400/com.example.notification_testing W/ication_testin: Accessing hidden method Landroid/os/WorkSource;->add(ILjava/lang/String;)Z (unsupported,test-api, reflection, allowed)
2022-03-22 14:45:04.263 24304-24400/com.example.notification_testing W/ication_testin: Accessing hidden method Landroid/os/WorkSource;->get(I)I (unsupported, reflection, allowed)
2022-03-22 14:45:04.263 24304-24400/com.example.notification_testing W/ication_testin: Accessing hidden method Landroid/os/WorkSource;->getName(I)Ljava/lang/String; (unsupported, reflection, allowed)
2022-03-22 14:45:04.276 24304-24351/com.example.notification_testing I/flutter: Notification Testing
2022-03-22 14:45:04.278 24304-24351/com.example.notification_testing I/flutter: Testing

Answer 1

FCM 主体

{
    "to": "<DEVICE ID>",
    "notification": {
        "body": "Body of Your Notification",
        "title": "Title of Your Notification A",
        "sound": "default",
        "alert": "New"
    },
    "priority": "high",
    "contentAvailable": true,
    "data": {
        "body": "Body of Your Notification in Data",
        "title": "Title of Your Notification in Title B",
        "key_1": "Value for key_1",
        "key_2": "Value for key_2"
    }
}


FirebaseMessaging.onMessage.listen((message) {
print(' FCM on message  : ${message.data}');
})

使用数据字段显示通知

Answer 2

同样的挑战困扰了我好几天。 我使用由

overlay_support: ^2.1.0

包提供支持的应用内通知小部件解决了这个问题。这是该包的链接https://pub.dev/packages/overlay_support

此软件包使人们能够通过应用程序显示通知。在可自定义的持续时间后将其关闭。

用这个小部件包装你的MaterialApp()之后，

...

return OverlaySupport(
  child: MaterialApp(
    title: 'App Title',
    scaffoldMessengerKey: scaffoldMessengerKey ,
    routes:<String, WidgetBuilder> {
       
    },
  ),
);

您可以通过调用

onMessage

对象上的

FirebaseMessaging

从任何屏幕启动通知。

FirebaseMessaging.onMessage.listen((RemoteMessage message) async {
  print("onMessage: $message");
  
  showOverlayNotification((context) {
    
      return Card(
        color: Colors.white,
        margin: const EdgeInsets.symmetric(vertical: 50, horizontal: 15),
        child: ListTile(
          minVerticalPadding: 0,
          contentPadding: const EdgeInsets.symmetric(horizontal: 10, vertical: 10),
          leading: SizedBox.fromSize(
              size: const Size(40, 40),
              child: ClipOval( child: Image.asset('assets/images/icon.png'))
            ),
          // title: Text(message.notification!.title??""),
          subtitle: Text(message.notification!.body??""),
          trailing: IconButton(
              icon: Icon(Icons.close),
              onPressed: () {
                OverlaySupportEntry.of(context)!.dismiss();
              }),
        ),
      );
    }, duration: Duration(milliseconds: 4000));
});