Android Studio 3.0 Unable to merge dex

Question

Just Updated android studio from 2.3.3 to 3.0 now I am having the error

Error:Execution failed for task \':app:transformDexArchiveWithExternalLibsDexMergerFo         


        

Answer 1

In your file build.gradle (Project: XXX), there is this snippet

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'                
    }
}

Previously, that is 2.3.3, then became 3.0.0 when you updated your Android Studio. Try reverting it to 2.3.3 then Resync, then wait for your Android Studio to ask to update your Gradle and gradle plugin to 3.0.0. By this time, no build issues should appear related to Merge Dex.