android - Firebase 推送通知未在屏幕上弹出 [Flutter]

Question

我正在尝试为 flutter 应用程序实现 Firebase 推送通知。

但它只是在状态栏中显示为一个图标。我怎样才能让它弹出？



我想在收到通知时在屏幕上弹出。

这是我的代码的样子:

 Future<bool> sendNotification(var userToken, String bodyMessage) async {
 final data = {
  "notification": {
    "body": bodyMessage,
    "title": "Leave Application",
  },
  "priority": "high",
  "data": {
    "click_action": "FLUTTER_NOTIFICATION_CLICK",
    "id": "1",
    "status": "done"
  },
  "registration_ids": userToken,
 };

 final headers = {
  'content-type': 'application/json',
  'Authorization':
  'key=<Firebase web key>',
 };

 final response = await http.post(postUrl,
    body: json.encode(data),
    encoding: Encoding.getByName('utf-8'),
    headers: headers);

 if (response.statusCode == 200) {
  print(response.statusCode.toString());
  print("Working");
  return true;
 } else {
  print(postUrl.toString());
  print(response.statusCode.toString());
  print("Not Working");
  return false;
 }
}

Answer 1

所有通知将发送至杂项 channel if android_channel_id FCM HTTP API 中未指定。 杂项 channel 带有默认的重要性级别，只有声音但不会在屏幕上弹出。
要在屏幕上弹出通知，您需要 创建一个重要性为 max/high 的通知 channel .关于如何创建通知 channel 的详细步骤，您可以引用Notification Channel Documentation by FlutterFire .
创建通知 channel 后，您可以将 channel id(例如:high_importance_channel)添加到 FCM HTTP API 请求正文中，当您的应用处于后台时，发送到该 channel 的通知应该开始在屏幕上弹出。

{
  "notification": {
    "android_channel_id": "high_importance_channel",
    "title": "Notification Title",
    "body": "Notification body ...",
    "sound": "default",
    "priority": "high",
    "time_to_live": 86400,
    "click_action": "FLUTTER_NOTIFICATION_CLICK",
  },
  "data": {
    "post_id": 10000012,
    "type": "NEWS",
  },
  "condition": "'dogs' in topics"
}