Android Studio3.0报错：Annotation processors must be explicitly declared now

偶尔在GitHub上搞点代码瞅瞅，AS升级3.0之后带入经常吃点这样那样的错误：

Annotation processors must be explicitly declared now.  The following dependencies on the compile classpath are found to contain annotation processor.  Please add them to the annotationProcessor configuration.
  - butterknife-7.0.1.jar (com.jakewharton:butterknife:7.0.1)
Alternatively, set android.defaultConfig.javaCompileOptions.annotationProcessorOptions.includeCompileClasspath = true to continue with previous behavior.  Note that this option is deprecated and will be removed in the future.
See https://developer.android.com/r/tools/annotation-processor-error-message.html for more details.

大概意思是：

注释处理器现在必须显式声明。发现编译类路径的下列依赖关系包含注释处理器。请将它们添加到注释处理器配置中。

处理：

在app的build中 android {
    ...
    defaultConfig {
        ...
        //添加如下配置

       javaCompileOptions { annotationProcessorOptions { includeCompileClasspath = true } }
    }
}