報錯！

Error:Execution failed for task ':app:javaPreCompileDebug'.
> 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-6.0.0.jar (com.jakewharton:butterknife:6.0.0)

  See https://developer.android.com/r/tools/annotation-processor-error-message.html for more details.

       ( 在defaultConfig中新增如下程式碼 :)

javaCompileOptions { 
    annotationProcessorOptions { 
        includeCompileClasspath = true 
} 
}

}

例如：