@Override
public boolean process(Set<? extends TypeElement> set, RoundEnvironment roundEnvironment) {

//ActivityBinding这个注解作用域：@Retention(RetentionPolicy.CLASS)
 
    try {
        Set<? extends Element> elements = 
roundEnvironment.getElementsAnnotatedWith(ActivityBinding.class);
        for (Element element : elements) {
            if (element.getKind() != ElementKind.CLASS) {
                continue;
            }
            mMessager.printMessage(Diagnostic.Kind.NOTE, "===element: " + element);
            //扫描全部被注解的class           

           createMvpHelperClass((TypeElement) element);
        }
    } catch (Exception e) {
        e.printStackTrace();
        mMessager.printMessage(Diagnostic.Kind.ERROR, "===e: " + e);
    }
    System.out.println("================process end===========================");
    return false;
}

private void createMvpHelperClass(TypeElement typeElement) {
  //在class中查是否存在注解。如果不存在结束
      ActivityBinding annotation = typeElement.getAnnotation(ActivityBinding.class);
      if (annotation == null) {
          return;
      }
//我的注解里面定义了int值放 布局id，这里取出来
      int layoutId = annotation.layout();
  
      // 获取包名
      String packageName = mElementUtils.getPackageOf(typeElement).getQualifiedName().toString();
      // Java类名，到这里，就是你需要的被注解的java的类名了。方法返回的是全路径，这里进行了截取
      String className = typeElement.getQualifiedName().toString().substring(packageName.length() + 1);