public void updateNotificationIcons(NotificationData notificationData) {
    final LinearLayout.LayoutParams params =
        new LinearLayout.LayoutParams(
            mIconSize + 2 * mIconHPadding, mPhoneStatusBar.getStatusBarHeight());

    ArrayList<NotificationData.Entry> activeNotifications =
        notificationData.getActiveNotifications();
    final int N = activeNotifications.size();
    ArrayList<StatusBarIconView> toShow = new ArrayList<>(N);

    // Filter out ambient notifications and notification children.
    for (int i = 0; i < N; i++) {
      NotificationData.Entry ent = activeNotifications.get(i);
      if (notificationData.isAmbient(ent.key)
          && !NotificationData.showNotificationEvenIfUnprovisioned(ent.notification)) {
        continue;
      }
      if (!PhoneStatusBar.isTopLevelChild(ent)) {
        continue;
      }
      toShow.add(ent.icon);
    }

    ArrayList<View> toRemove = new ArrayList<>();
    for (int i = 0; i < mNotificationIcons.getChildCount(); i++) {
      View child = mNotificationIcons.getChildAt(i);
      if (!toShow.contains(child)) {
        toRemove.add(child);
      }
    }

    final int toRemoveCount = toRemove.size();
    for (int i = 0; i < toRemoveCount; i++) {
      mNotificationIcons.removeView(toRemove.get(i));
    }

    for (int i = 0; i < toShow.size(); i++) {
      View v = toShow.get(i);
      if (v.getParent() == null) {
        mNotificationIcons.addView(v, i, params);
      }
    }

    // Resort notification icons
    final int childCount = mNotificationIcons.getChildCount();
    for (int i = 0; i < childCount; i++) {
      View actual = mNotificationIcons.getChildAt(i);
      StatusBarIconView expected = toShow.get(i);
      if (actual == expected) {
        continue;
      }
      mNotificationIcons.removeView(expected);
      mNotificationIcons.addView(expected, i);
    }

    applyNotificationIconsTint();
  }
 private void applyNotificationIconsTint() {
   for (int i = 0; i < mNotificationIcons.getChildCount(); i++) {
     StatusBarIconView v = (StatusBarIconView) mNotificationIcons.getChildAt(i);
     boolean isPreL = Boolean.TRUE.equals(v.getTag(R.id.icon_is_pre_L));
     boolean colorize = !isPreL || isGrayscale(v);
     if (colorize) {
       v.setImageTintList(ColorStateList.valueOf(mIconTint));
     }
   }
 }