单击通知时，Android 上的 Flutter 应用程序不会打开应用程序

Question

按照https://pub.dev/packages/firebase_messaging 上的说明，我已经实现了 FCM。 虽然我已经设置了click_action: FLUTTER_NOTIFICATION_CLICK ，但当我点击通知托盘项目时，它并没有打开应用程序。 flutter app从云函数接收到的数据如下。 我如何至少在点击通知时打开应用程序？

onMessage: {notification: {title: pi, body: text message.}, 
          data: {USER_NAME: pi, click_action: FLUTTER_NOTIFICATION_CLICK, }}

云函数有效载荷

 const payload = {
        notification: {
            title: sender,
            body: content,
            clickAction: 'ChatActivity',
        },
        data: {
            "click_action": 'FLUTTER_NOTIFICATION_CLICK',
            "USER_NAME": sender,
        }
    };

我还创建了通知渠道，并且 AndroidManifest 已正确配置。

private void createNotificationChannel() {
        // Create the NotificationChannel, but only on API 26+ because
        // the NotificationChannel class is new and not in the support library
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            CharSequence name = getString(R.string.app_name);
            String description = getString(R.string.notification_channel_description);
            int importance = NotificationManager.IMPORTANCE_HIGH;
            NotificationChannel channel = new NotificationChannel(getString(R.string.default_notification_channel_id), name, importance);
            channel.setDescription(description);
            // Register the channel with the system; you can't change the importance
            // or other notification behaviors after this
            NotificationManager notificationManager = getSystemService(NotificationManager.class);
            notificationManager.createNotificationChannel(channel);
        }
    }

Answer 1

我已将单击操作置于通知 json 中，它对我有用。

notification: {
  title: sender,
  body: content,
  click_action: 'FLUTTER_NOTIFICATION_CLICK'
}

只有onResume和onLaunch回调才需要单击操作，因此请务必按照 pub.dev 文档中的说明实现它：

 _firebaseMessaging.configure(
       onMessage: (Map<String, dynamic> message) async {
         print("onMessage: $message");
         _showItemDialog(message);
       },
       onBackgroundMessage: myBackgroundMessageHandler,
       onLaunch: (Map<String, dynamic> message) async {
         print("onLaunch: $message");
         _navigateToItemDetail(message);
       },
       onResume: (Map<String, dynamic> message) async {
         print("onResume: $message");
         _navigateToItemDetail(message);
       },
     );