Error when building apk - “Multiple dex files define Lcom/google/ads/Ad”

Question

I\'ve been tearing my hair out over this one, for the past 3 hours I\'ve been trying to fix it but have been unable to. I\'ve created an android app and I\'m ready to put it

Answer 1

I had the same or a similar problem. My problem was that my application imported a library which used a different version of AdMob SDK.

Details of my problem:

• Library used AdMob SDK 6.3.0
• Application used AdMob SDK 6.1.0

Fixed it by including the same version.