Duplicate class com.google.common.util.concurrent.ListenableFuture found in modules guava-20.0.jar (com.google.guava:guava:20.0)

Question

When I use implementation \'com.google.firebase:firebase-inappmessaging-display:17.2.0\' in my app/build.gradle, I get this error:

Answer 1

2020 Solution

Google knows about this error so they made a special package to fix the conflict.

Add this to your build.gradle

implementation 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'