如何在 Flutter & Firebase 的前台打印 (message.data)

Question

我正在为我的 Android APP 添加 Cloud Messaging 功能，但无法在前台截取 message.data。

例子是

FirebaseMessaging.onMessage.listen((RemoteMessage message) {
  print('Got a message whilst in the foreground!');
  print('Message data: ${message.data}');

  if (message.notification != null) {
    print('Message also contained a notification: ${message.notification}');
  }
});

它应该打印第一行 Got a message whilst in the foreground!..., 但是我得到

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

我是不是漏掉了什么？

Answer 1

 FirebaseMessaging.onMessage.listen((message) async {
      if (message.notification != null) {
      print(
          'Message contained a notification, with the following:\nTitle: ${message.notification?.title}\nBody: ${message.notification?.body}');
    }
    return;
  }).onData((data) {
    print('Got a DATA message whilst in the FOREGROUND!');
    print('data is: ${data.data}');
  });

基本上您需要使用 onData 用于 onMessage 或前台或后台。

Answer 2

从这个 issue 看来，它似乎是最新版本 firebase_messaging 的一个错误，当前的解决方法是在收听消息之前添加一行以获取令牌。

将您的代码更新为：

await FirebaseMessaging.instance.getToken(); // Add this line
FirebaseMessaging.onMessage.listen((RemoteMessage message) {
  print('Got a message whilst in the foreground!');
  print('Message data: ${message.data}');

  if (message.notification != null) {
    print('Message also contained a notification: ${message.notification}');
  }
});

如何在 Flutter & Firebase 的前台打印 (message.data)

How to print(message.data) on foreground at Flutter & Firebase

android

firebase

flutter

firebase-cloud-messaging