How to Troubleshoot Android GCM 401 error?

Question

I\'m getting many 401 Unauthorized errors when trying to connect to Google Cloud Message Server.

Our code was working for some time on

Answer 1

I have solved my problem by creating new API Key under same project. Following this

Go to Google developer console then Select project Credentials -> Create Credentials -> API Key -> Server Key then add your server ip address where your GCM server code hosted.

After creating Api key it may takes 5 minutes to be workable