Android 当应用程序处于后台时，颤振通知为空

当应用程序在后台时，不会调用onResume，但我会在托盘中收到某种默认通知，其中有一个空白图标，没有图像

当我单击此通知时，会调用onResume并打开应用程序，但不会导航到正确的路径

当Flatter应用程序位于前台时，Firebase消息的行为与预期一致。 -调用onMessage，通知在托盘中有图标和图像

我想知道通知/消息的设置是否在错误的位置

  class NotificationIcon extends StatefulWidget {
  @override
  NotificationIconState createState() => NotificationIconState();
}

class NotificationIconState extends State<NotificationIcon> {
  FirebaseMessaging firebaseMessaging = new FirebaseMessaging();

  void fcmSubscribe() {
    ...
  }

  void fcmUnSubscribe() {
   ...
  }

  Future showBigPictureNotification(Map<String, dynamic> message) async {
    ...
    var bigPictureStyleInformation = new BigPictureStyleInformation(
        bigPicturePath, BitmapSource.FilePath,
        contentTitle: title, summaryText: messageText);
    var androidPlatformChannelSpecifics = new AndroidNotificationDetails(
        '', topic, messageText,
        style: AndroidNotificationStyle.BigPicture,
        styleInformation: bigPictureStyleInformation);
    var platformChannelSpecifics =
        new NotificationDetails(androidPlatformChannelSpecifics, null);
    await flutterLocalNotificationsPlugin.show(
        0, title, messageText, platformChannelSpecifics);
  }

  @override
  void initState() {
    super.initState();
    firebaseMessaging.configure(
      onMessage: (Map<String, dynamic> message) async {
        print("onMessage: $message");
        currentMessage = message;
        await showBigPictureNotification(currentMessage);
      },
      onLaunch: (Map<String, dynamic> message) async {
        print("onLaunch: $message");
        currentMessage = message;
        await showBigPictureNotification(currentMessage);
      },
      onResume: (Map<String, dynamic> message) async {
        print("onResume: $message");
        currentMessage = message;
        await showBigPictureNotification(currentMessage);
      },
    );

    onSelectNotification(String payload) async {
      await navigatorKey.currentState.push(new MaterialPageRoute(...));
    }

    firebaseMessaging.requestNotificationPermissions();
    flutterLocalNotificationsPlugin = new FlutterLocalNotificationsPlugin();
    var initializationSettingsAndroid =
        new AndroidInitializationSettings('ic_stat_fiber_new');
    var initializationSettings =
        new InitializationSettings(initializationSettingsAndroid, null);
    flutterLocalNotificationsPlugin.initialize(initializationSettings,
        onSelectNotification: onSelectNotification);
  }

  @override
  Widget build(BuildContext context) {
    < widget >
  }
}

由于AndroidX问题，在某些依赖项的旧版本上

应用程序处于前台时的工作通知

应用程序在前台时不工作通知

---

感谢所有像我这样在这个问题上损失了很多时间的人。 我发送的通知有一个父“通知”对象，而它本应是“数据”对象

从这里的答案可以看出：

正如@boformer所指出的，这只适用于“通知”消息。如果您正在发送“数据”消息，则不会创建任何通知，并且消息仅通过onMessage传递。更多详细信息请参见插件自述和firebase文档

---

这就是为什么onMessage使用我的代码创建通知时表现得与预期一样，而onResume使用的是默认通知

您是否确保正确解析了

消息的结构？（如果您从推送通知中读取标题/正文）？Flatter firebase消息中有一个“bug”，导致
onResume
和
onMessage
具有不同的参数结构。顺便说一句，您知道，如果您只想显示标题/消息和图像，您可以从服务器端直接使用firebase消息进行显示，因此，您不必亲自对客户机进行操作。如果你能做到这一点，我强烈建议你走那条路线。。在Flatter中处理后台任务是一个PITA（并且不受支持），同时本地_通知与firebase消息插件的结合也存在问题。谢谢@herbert。你给我指明了正确的方向。整理好了。
flutter doctor -v
[√] Flutter (Channel stable, v1.2.1, on Microsoft Windows [Version 10.0.16299.1004], locale en-IE)
    • Flutter version 1.2.1 at flutter
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    • Engine revision 3757390fa4
    • Dart version 2.1.2 (build 2.1.2-dev.0.0 0a7dcf17eb)

[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
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    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
    • All Android licenses accepted.

[√] Android Studio (version 3.2)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 31.1.1
    • Dart plugin version 181.5656
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[√] VS Code (version 1.32.3)
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    • Flutter extension version 2.24.0

[√] Connected device (1 available)
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• No issues found!

dependencies:
  flutter:
    sdk: flutter
  http:
  url_launcher: 4.2.0+3
  flutter_image: ^1.0.0
  path_provider: 0.4.1
  flutter_downloader: 1.1.3
  fluttertoast: ^2.2.11
  pin_code_view: 0.1.0
  image_picker: 0.4.12+1
  firebase_core: 0.2.5+1
  firebase_storage: 1.1.0+1
  uuid: ^1.0.0
  cupertino_icons: ^0.1.0
  permission_handler: 1.0.1
  transparent_image: 0.1.0
  shared_preferences: 0.4.3
  flutter_launcher_icons: ^0.7.0
  firebase_messaging: 2.1.0
  flutter_local_notifications: 0.4.5