Can't use okhttp combine with otto?

[jompon]

My Gradle compile 'com.squareup.okhttp:okhttp:2.6.0' compile 'com.squareup:otto:1.3.8'

public final class BusProvider {
  private static final Bus BUS = new Bus(); <--------Error on this line

  public static Bus getInstance() {
    return BUS;
  }

  private BusProvider() {
    // No instances.
  }
}

java.lang.NoClassDefFoundError: com.squareup.otto.ThreadEnforcer

[JakeWharton]

These libraries do not interact. Try a clean build or disable/update your ProGuard config as it might be erroneously stripping classes.

As this is a usage question and not a bug or feature request, StackOverflow is a better place for these types of general questions.