new firebase with awesome features was just announced, but according to documentation (https://firebase.google.com/docs/android/setup#prerequisites) android studio (as well as gradle) is required now. For now in my cocos2d-x apps I have to use ADT/Eclipse to build apps, because gradle isn't supported yet (however cocos2d-x team is working on it). I'm now using an older version of the sdk, which is just a jar file. Is there a way to use new firebase in eclipse? What worries me the most is that plugin:
apply plugin: 'com.google.gms.google-services'