after upgrading the android gradle plugin from 3.0.0-alpha1 to 3.0.0-alpha2 my application does not start anymore: part of the stacktrace:
I think this is a temporarily bug. Proparbly Proguard removes this class because of some reason, therefore this exception occurs. For now the easiest solution might be to disable Proguard in the build.gradle file. If you still want to keep it, you will have to change your proguard settings.
This is what I did and what worked for me:
-dontwarn android.support.v7.**
-keep class android.support.v7.widget.** { *; }
As I also had issues with constraint and design libray I added this:
-dontwarn android.support.constraint.**
-keep class android.support.constraint.** { *; }
-dontwarn android.support.design.**
-keep class android.support.design.** { *; }
I hope it helps you:)