当应用程序在后台或关闭时，本机推送通知不显示横幅（在屏幕上弹出）

Question

我正在使用react-native-push-notification并遵循其文档。当应用程序位于前台时，它工作正常，但是当应用程序位于后台时，我尝试从Firebase控制台发送通知，只是在状态栏中显示了该应用程序的一个小图标，但未显示横幅

我试图添加一个新频道，但仍然无法正常工作

componentDidMount() {

        NetInfo.isConnected.addEventListener('connectionChange', this.handleConnectivityChange);

        PushNotification.configure({

            // (optional) Called when Token is generated (iOS and Android)
            onRegister: function(token) {
                console.log( 'TOKEN:', token );
            },

            // (required) Called when a remote or local notification is opened or received
            onNotification: function(notification) {
                console.log( 'NOTIFICATION:', notification );

                Platform.OS === 'ios' ? notification.finish(PushNotificationIOS.FetchResult.NoData) : null;
            },

            // ANDROID ONLY: GCM or FCM Sender ID (product_number) (optional - not required for local notifications, but is need to receive remote push notifications)
            senderID: Variables.GCM_SENDER_ID,

            // IOS ONLY (optional): default: all - Permissions to register.
            permissions: {
                alert: true,
                badge: true,
                sound: true
            },

            visibility: 'public',

            popInitialNotification: true,

            requestPermissions: true,
        });
    }

Answer 1

您必须创建一个 android 通知通道并设置您希望它具有的配置，例如，

{
channelId: "general-or-something",
channelName: "General or Something",
channelDescription: "Description for general or something",
playSound: true,
importance: "High",
vibrate: true,
}

既然你已经安装了react-native-push-notification，你可以使用该方法PushNotification.createChannel()来创建频道，它看起来像这样，

PushNotification.createChannel(
 {
  channelId: Channels.GENERAL.channelId,
  channelName: Channels.GENERAL.channelName,
  channelDescription: Channels.GENERAL.channelDescription,
  playSound: true,
  importance: Importance.HIGH,
  vibrate: true,
 },
 () => null,
);

并在您的firebase.json文件中添加一个新的道具，messaging_android_notification_channel_id将 Channels.GENERAL.channelId 分配给它，这将帮助您覆盖 firebase 创建的默认频道，并让您在其之上使用您的配置。