AS编译报错:Annotation processors must be explicitly declared now

报错:

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.
  - xxx-1.2.1.jar (com.xxx:1.2.1)
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.

解决方案

在build.gradle文件android->defaultConfig下增加如下配置

javaCompileOptions {
    // 显式声明支持注解
    annotationProcessorOptions {
        includeCompileClasspath false
    }
}

完整代码样例:

android {
    ...
    defaultConfig {
        ...
        javaCompileOptions {
            // 显式声明支持注解
            annotationProcessorOptions {
                includeCompileClasspath false
            }
        }
    }
}