How to suppress notification on lock screen in Android 5 (Lollipop) but let it in notification area?

Question

After upgrade to Android 5.0 Lollipop it started showing automatically ongoing notification on lock screen.

Sometimes users don\'t want to see all of them so they a

Answer 1

Seems like VISIBILITY_SECRET does the cleanest approach. As per the documentation:

a notification can be made VISIBILITY_SECRET, which will suppress its icon and ticker until the user has bypassed the lockscreen.

Per the source (NotificationData in the SystemUI AOSP project), VISIBILITY_SECRET is the only way to do it:

boolean shouldFilterOut(StatusBarNotification sbn) {
    if (!(mEnvironment.isDeviceProvisioned() ||
            showNotificationEvenIfUnprovisioned(sbn))) {
        return true;
    }

    if (!mEnvironment.isNotificationForCurrentProfiles(sbn)) {
        return true;
    }

    if (sbn.getNotification().visibility == Notification.VISIBILITY_SECRET &&
            mEnvironment.shouldHideSensitiveContents(sbn.getUserId())) {
        return true;
    }
    return false;
}

The only other type of notifications that appear to be filtered out are child notifications in a group where a summary is present. So unless you have multiple with a valid reason for a summary, VISIBILITY_SECRET is the best that can currently be done.