Execution failed for task ':app:dexDebug' Android Studio

Question

The application was able to execute before updating my android studio,this is the error I am getting:

Error:Execution failed for task \':app:dexDebug\'.
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Answer 1

in my case, the

compile 'com.google.android.gms:play-services:+'

in my build.gradle exceeded the 65k method limit.

i changed it to

compile 'com.google.android.gms:play-services-maps:6.5.87'

to fix it (i only need maps in my application)

hope that helps