fetchIconAndShow(context, iconUrl, new Callback<Bitmap>() {
            @Override
            public void run(Bitmap bitmap) {
                OpLog.d("gongzelong", "run notify");
                NewsNotificationHandler.notify(context, article, bitmap, contentIntent);
            }
        });
}

private static void fetchIconAndShow(Context context, @Nullable String iconUrl,
                                         final Callback<Bitmap> callback) {
        if (TextUtils.isEmpty(iconUrl)) {
            // Display with the default icon.
            OpLog.d("gongzelong", "iconUrl isEmpty");
            callback.run(null);
        } else {
            // Load icon first.
            NetworkManager.getPicasso()
                    .load(iconUrl)
                    .memoryPolicy(MemoryPolicy.NO_CACHE)
                    .networkPolicy(NetworkPolicy.NO_CACHE)
                    .into(new Target() {
                        @Override
                        public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
                            OpLog.d("gongzelong", "onBitmapLoaded");
                            callback.run(bitmap);
                        }

                        @Override
                        public void onPrepareLoad(Drawable placeHolderDrawable) {
                            OpLog.d("gongzelong", "onPrepareLoad");
                        }

                        @Override
                        public void onBitmapFailed(Drawable errorDrawable) {
                            OpLog.d("gongzelong", "onBitmapFailed");
                            callback.run(null);
                        }
                    });
        }
    }

private static void notify(Context context, Bundle extras, @Nullable Bitmap icon) {
        // Send back to the appboy receiver and handle the subsequent opened
        // action(APPBOY_NOTIFICATION_OPENED) in AppboyBroadcastReceiver.
        Intent pushOpenedIntent = new Intent(
                Constants.APPBOY_PUSH_CLICKED_ACTION).setClass(context,
                AppboyNotificationUtils.getNotificationReceiverClass());
        pushOpenedIntent.putExtras(extras);
        PendingIntent pushOpenedPendingIntent =
                PendingIntent.getBroadcast(context,
                        IntentUtils.getRequestCode(), pushOpenedIntent,
                        PendingIntent.FLAG_ONE_SHOT);

        Bundle pushExtras = extras.getBundle(Constants.APPBOY_PUSH_EXTRAS_KEY);
        int defaults = 0;
        int priority = Notification.PRIORITY_DEFAULT;
        int flags = getFlags(pushExtras);
        if ((flags & FLAG_SOUND) != 0) {
            defaults |= Notification.DEFAULT_SOUND;
        }
        if ((flags & FLAG_VIBRATE) != 0) {
            defaults |= Notification.DEFAULT_VIBRATE;
        }
        if ((flags & FLAG_LIGHTS) != 0) {
            defaults |= Notification.DEFAULT_LIGHTS;
        }
        if ((flags & FLAG_HEADS_UP) != 0) {
            // These below make system UI choose to display a heads-up notification
            defaults |= Notification.DEFAULT_VIBRATE;
            priority = Notification.PRIORITY_MAX;
        }
        String notificationId = getNotificationId(pushExtras);
        showNotification(context,
                pushExtras.getString(TITLE_KEY), pushExtras.getString(TEXT_KEY), icon,
                pushOpenedPendingIntent, defaults, priority,
                null, notificationId.hashCode());

        onOperationEnd(context, notificationId);
    }

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
    private static void showNotification(Context context,
                                         String title, @Nullable String text, @Nullable Bitmap icon,
                                         PendingIntent contentIntent, int defaults, int priority,
                                         @Nullable String notificationTag, int notificationId) {
        OpLog.d("gongzelong", "showNotification");
        RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
                R.layout.feed_notification);

        if (icon != null) {
            remoteViews.setImageViewBitmap(R.id.icon, icon);
        } else {
            // Fallback to the default icon
            remoteViews.setImageViewResource(R.id.icon, R.drawable.icon);
            // Also hide the small icon
            remoteViews.setViewVisibility(R.id.small_icon, View.GONE);
        }
        remoteViews.setTextViewText(R.id.title, title);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M) {
            builder.setSmallIcon(R.drawable.push_icon)
                    .setContentIntent(contentIntent)
                    .setCustomContentView(remoteViews)
                    .setVisibility(Notification.VISIBILITY_PUBLIC)
                    .setAutoCancel(true)
                    .setDefaults(defaults)
                    .setPriority(priority);
            NotificationManager notificationMgr = (NotificationManager) context
                    .getSystemService(Context.NOTIFICATION_SERVICE);
            Notification n  = builder.build();
            notificationMgr.notify(notificationTag, notificationId, n);
        } else {
            builder.setSmallIcon(R.drawable.push_icon)
                    .setContentIntent(contentIntent)
                    .setContent(remoteViews)
                    .setVisibility(Notification.VISIBILITY_PUBLIC)
                    .setAutoCancel(true)
                    .setDefaults(defaults)
                    .setPriority(priority);
            NotificationManager notificationMgr = (NotificationManager) context
                    .getSystemService(Context.NOTIFICATION_SERVICE);
            notificationMgr.notify(notificationTag, notificationId, builder.build());
        }
    }