Error: app:transformClassesWithDexBuilderForDebug

Question

I have a class HillfortStore in this package:

package org.wit.hillforts.models

Messed up the package name in the class (missing the \'s\'):

Answer 1

just do this :

in main project folder ,in terminal type

cd android

then type this

./gradlew clean

then build your app again

Answer 2

I needed to complete a rebuild of the app. This is all it took to fix the issue. It is working now.

Answer 3

I had a similar problem because Lombok plugin didn't work with new gradle. Just removed these lines:

compileOnly 'org.projectlombok:lombok:1.18.4'
annotationProcessor 'org.projectlombok:lombok:1.18.4'

and the problem disappeared.

Maybe you also have some kind of "troubled" plugin that doesn't get along with new gradle)

Answer 4

Delete .gradle file from your project folder then clean the project and Rebuild