PendingIntent.getBroadcast lint warning

Question

There is this new warning about using PendingIntent.getBroadcast as a notification's content intent:

builder.setContentIntent(PendingIntent.getBroadcast(FirebaseNotification.this, newID,
                                                  new Intent(getString(R.string.notif_broadcast))
                                                          .setClass(FirebaseNotification.this, NotificationActions.class)
                                                          .putExtra(getString(R.string.thumbnail), bitmap);

Lint message:

Notifications should only launch a BroadcastReceiver from notification actions (addAction)

Notifications should only launch a BroadcastReceiver from notification actions (addAction) (This BroadcastReceiver intent is launched from a notification; this is discouraged except as notification actions)

I do not see this anywhere yet in the documentation, so why is this now discouraged? Is it for user experience and to provide clear context of what the notification can do?

Answer 1

It wouldn't make much sense to a user if tapping a notification sent a broadcast. The expected behaviour would be to open the actual app that sent the notification originally, so I am not sure that sending another notification (which I presume is what your code achieves) would be good UX.

They do actually mention this is the material design documentation where they say:

When the user taps a notification, they should be taken to a screen in your app that relates directly to that notification and lets them take immediate action.