Java 如何使用Firebase云消息在前台显示多个通知

我在Android中有一个应用程序，它接收来自firebase的通知，但当它在前台时，新的通知将取代以前的通知。我怎样才能把一切都展示出来？ 这是我的课

公共类FirebaseNotifications扩展了FirebaseMessagingService { 私有静态最终字符串TAG=“MyFirebaseMsgService”

}我决定

private final static AtomicInteger c = new AtomicInteger(0);

    public static int getID() {
        return c.incrementAndGet();
    }


private void sendNotification(String messageBody, String icon)
{

    String channelId = "General";
    Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

    NotificationCompat.Builder notificationBuilder =
            new NotificationCompat.Builder(this, channelId)
                    .setLargeIcon(getBitmapFromURL(icon))
                    .setContentTitle("Chapur")
                    .setSmallIcon(R.drawable.icon_agenda)
                    .setContentText(messageBody)
                    .setAutoCancel(true)
                    .setSound(defaultSoundUri);

    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(getID(), notificationBuilder.build());
}

---

您的问题是，您总是在行中使用“0”作为notif ID

notificationManager.notify（0，notificationBuilder.build（））

如果你每次都给它一个新的id，你就不会有这个问题：）

private final static AtomicInteger c = new AtomicInteger(0);

    public static int getID() {
        return c.incrementAndGet();
    }


private void sendNotification(String messageBody, String icon)
{

    String channelId = "General";
    Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

    NotificationCompat.Builder notificationBuilder =
            new NotificationCompat.Builder(this, channelId)
                    .setLargeIcon(getBitmapFromURL(icon))
                    .setContentTitle("Chapur")
                    .setSmallIcon(R.drawable.icon_agenda)
                    .setContentText(messageBody)
                    .setAutoCancel(true)
                    .setSound(defaultSoundUri);

    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(getID(), notificationBuilder.build());
}