Android GCM SENDER_ID, how to get it?

Question

I try to migrate to GCM and I have an issue with the SENDER_ID I need to provide. I use the demo project from google. In this project I need, if I

Answer 1

Maybe you haven't activated Google Cloud Messaging for Android in API COnsole. Here is the instructions:

http://developer.android.com/google/gcm/gs.html