I'm trying to list all active notifications on an Android device, by going through their textual fields and extras. For most notifications, that works fine - but for some apps, all these fields (such as title, subtext and so on) are all empty/null. These problematic notifications show empty even on Android's notifications log screen, and in apps like Notification Saver.
For example, see this custom-made notification by ES File Explorer app:
I've come to the conclusion that the reason might be that these specific notifications are probably using a custom RemoteView for their contentView (as explained here), without setting the other textual fields. My notification listener could access fields that might be relevant, such as statusBarNotification.getNotification().contentView and statusBarNotification.getNotification().bigContentView, but couldn't find any read/get functions there.
So my question is - can I somehow read the contents of these custom/remote views of a given notification? Perhaps inspect it during runtime? Or if I know a specific viewId that I'm looking for within that view?