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

I would also like to add that you will receive this error if you're using Build tools v26+:

app/build.grade:

compileSdkVersion 26
buildToolsVersion "26.0.2"

defaultConfig {
    targetSdkVersion 26

Downgrading to lowest version should work fine.