项目场景：
最近在使用AndroidStudio3.X的版本维护之前的项目的时候，发现项目的butter knife报错：
问题描述：
` 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-7.0.1.jar
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.
`
解决方案：
javaCompileOptions { annotationProcessorOptions { includeCompileClasspath = true } }
仅记录问题勿喷