Android O reporting notification not posted to channel - but it is

Question

Couple Android O notification questions:

1) I have created a Notification Channel (see below), am calling the builder with .setChannelId() (passing in the name of th

Answer 1

create a notification using following code :

    Notification notification = new Notification.Builder(MainActivity.this)
              .setContentTitle("New Message")
                        .setContentText("You've received new messages.")
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setChannelId(channelId)
                        .build();

not using :

Notification notification = new NotificationCompat.Builder(MainActivity.this)
                    .setContentTitle("Some Message")
                    .setContentText("You've received new messages!")
                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setChannel(channelId)
                    .build();