crashlytics android studio gradle build failed

Question

I have installed crashlytics plugin to android studio 0.9.3; after this I added to my project; It added lines to gradle, first activity and so on...; after this build fails with

Answer 1

This error due to wrong crashlaytics AppKey. Please check your manifest file for confirm it. OR

It is due to use of a string resource instead of Hardcoded AppKey in manifest file.

Use this:

Dont Use this

All the best