在以下oreo的Android版本上无法接收通知

Question

I used firebase cloud functions to the device to device notifications but notifications not working on versions below oreo.

private void sendNotification1(String notificationTitle, String notificationBody) {
    Intent intent = new Intent(this, MainActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
            PendingIntent.FLAG_ONE_SHOT);
    PendingIntent pendingIntent1 = PendingIntent.getBroadcast(this, 0,new Intent(this, MyReceiver.class), PendingIntent.FLAG_UPDATE_CURRENT);
    RemoteInput remoteInput = new RemoteInput.Builder(NOTIFICATION_REPLY)
            .setLabel("Respond to Message")
            .build();

    NotificationCompat.Action action =
            new NotificationCompat.Action.Builder(android.R.drawable.ic_delete,
                    "Reply Now...", pendingIntent1)
                    .addRemoteInput(remoteInput)
                    .build();

Here I am creating notification channel for oreo

 NotificationChannel notificationChannel = null;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        notificationChannel = new NotificationChannel(CHANNEL_ONE_ID,
                CHANNEL_ONE_NAME, NotificationManager.IMPORTANCE_HIGH );

        notificationChannel.enableLights(true);
        notificationChannel.setLightColor(Color.RED);
        notificationChannel.setShowBadge(true);
        notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
    }

    Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, CHANNEL_ONE_ID)
            .setAutoCancel(true)   //Automatically delete the notification
            .setSmallIcon(R.mipmap.ic_launcher)//Notification icon
            .addAction(action)
            .addAction(R.drawable.accept, "ACCEPT", pendingIntent)
            .addAction(R.drawable.delete, "DECLINE", pendingIntent)
            .setContentIntent(pendingIntent)
            .setContentTitle(notificationTitle)
            .setContentText(notificationBody)
            .setSound(defaultSoundUri);


    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        notificationManager.createNotificationChannel(notificationChannel);
    }
    notificationManager.notify(1, notificationBuilder.build());
}

I also mentioned the entry in Manifest too. And receiving notifications on oreo properly but below oreo version notifications are invisible. please help me out.

Answer 1

In Oreo Notification is showing using chanel id as in your code. But below oreo version chanel id is not required to use.

Check if your getting log while you receive notification from friebase. If you are getting log then notification functionality is working properly, you are not correctly notifying the device.