您可以通过多种方式构建本地通知。对于您的情况，我将建议最简单的方法。只需在将数据添加到 RecyclerView 之前立即调用buildLocalNotification（）函数，然后通知在 RecyclerView 中更改的数据。

  private void buildLocalNotification(String title,String message) {

        Intent intent = new Intent(getApplicationContext(),BaseActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
        PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(),0 /* Request code */,intent,PendingIntent.FLAG_ONE_SHOT);

        String channelId = getString(R.string.default_notification_channel_id);
        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

        NotificationCompat.Builder notificationBuilder =
                new NotificationCompat.Builder(this,channelId)
                        .setSmallIcon(R.drawable.ic_push_notification)
                        .setSound(defaultSoundUri)
                        .setContentTitle(title)
                        .setContentText(message)
                        .setAutoCancel(true)
                        .setContentIntent(pendingIntent);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);


        /**
         * Since Android Oreo
         */

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

            createNotificationChannel(channelId,notificationManager);

        }

        assert notificationManager != null;
        notificationManager.notify((int) System.currentTimeMillis(),notificationBuilder.build());
    }

    @SuppressLint("NewApi")
    public void createNotificationChannel(String channelId,NotificationManager notificationManager) {


        @SuppressLint("WrongConstant")
        NotificationChannel channel = new NotificationChannel(channelId,getString(R.string.app_name),NotificationManager.IMPORTANCE_MAX);
        AudioAttributes att = new AudioAttributes.Builder()
                .setUsage(AudioAttributes.USAGE_NOTIFICATION)
                .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
                .build();
        assert notificationManager != null;
        if (AppConstants.DEFAULT_NOTIFICATION_SOUND_URI != null) {
            channel.setSound(AppConstants.DEFAULT_NOTIFICATION_SOUND_URI,att);
        }
        channel.setLightColor(Color.parseColor("#F1E605"));
        channel.setVibrationPattern(VIBRATE_PATTERN);
        channel.canShowBadge();
        channel.enableVibration(true);
        notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.createNotificationChannel(channel);

    }