Android Media Notifications not being sent

[professorkester]

I have an app that's trying to listen for the media notifications broadcasted by my Spotify app (playback change, metadata change), but it doesn't seem to be working. I've been debugging and it doesn't even go inside my BroadcastReceiver. I just followed the instructions in this link https://developer.spotify.com/technologies/spotify-android-sdk/android-media-notifications/ 

Any ideas of what might be going wrong?