there are three day I'm trying to have a clear solution to start for each platform. Unfortunately, I'm very frustrating because I can't have that. Now in droid project there is a new kind of error:
java.lang.IllegalArgumentException: already added : Landroid/support/v4/view/VelocityTrackerCompat;
To resolve this issue, I removed all references from the Droid project and then I reinstalled all references.
Now it's working fine.