今天更新了AS 版本，執行事提示如下錯誤

Error:Unable to find method ‘com.android.build.gradle.api.BaseVariant.getOutputs()Ljava/util/List;’.
Possible causes for this unexpected error include:

• Gradle’s dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
  Re-download dependencies and sync project (requires network)
• The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.
  Stop Gradle build processes (requires restart)
• Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.

In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.

查閱了很久發現其實是Android Studio3.0與butterknife的衝突，github上面已經有了這個問題issue，JakeWharton大神也給了相關解釋，暫時的解決方法是降至8.4的版本。

  classpath 'com.jakewharton:butterknife-gradle-plugin:8.4.0'
    -------------------------------------------
  compile 'com.jakewharton:butterknife:8.4.0'
  annotationProcessor 'com.jakewharton:butterknife-compiler:8.4.0'
 

stackoverflow上還有其他衝突版本的相應修改