java.util.zip.ZipException: duplicate entry during packageAllDebugClassesForMultiDex

Question

I am not sure what this error means.

Execution failed for task \':excelSior:packageAllDebugClassesForMultiDex\'.
> java.util.zip.ZipException: duplicate          


        

Answer 1

This problem cost me one whole day. I finally downgraded the firebase-ui library version from 2.0.0 to 1.2.0 and added the following code inside Project level build.gradle file:

allprojects {
    repositories {
        jcenter()

        // Add the following code to your project level build.gradle
        maven {
            url 'https://maven.fabric.io/public'
        }
    }
}