import org.greenrobot.greendao.annotation.Entity; //导入依赖的package包/类
@Override
public Set<String> getSupportedAnnotationTypes() {
    return Collections.singleton(Entity.class.getCanonicalName());
}
 

import org.greenrobot.greendao.annotation.Entity; //导入依赖的package包/类
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {

    String daoListQualifiedName = "java.util.List<Class<? extends " +
            "org.greenrobot.greendao.AbstractDao<?, ?>>>";
    StringBuilder daoCode = new StringBuilder();
    daoCode.append("\n")
            .append(daoListQualifiedName)
            .append(" daoClasses = new java.util.ArrayList();\n\n");
    for (Element element : roundEnv.getElementsAnnotatedWith(Entity.class)) {
        if (element.getKind() == ElementKind.CLASS) {
            String className = packageName + "." + element.getSimpleName()
                    + "Dao.class";
            daoCode.append("daoClasses.add(")
                    .append(className)
                    .append(");\n");
        }
    }
    daoCode.append("\nreturn daoClasses;\n");

    TypeVariableName typeVariableName = TypeVariableName.get(daoListQualifiedName, List.class);
    MethodSpec createSpec = MethodSpec.methodBuilder("getAllDaos")
            .addModifiers(Modifier.PUBLIC, Modifier.STATIC)
            .returns(typeVariableName)
            .addJavadoc("Returns a List of all the DAOs classes available")
            .addCode(daoCode.toString())
            .build();


    TypeSpec daoSpec = TypeSpec.classBuilder("DaoHelper")
            .addModifiers(Modifier.PUBLIC, Modifier.FINAL)
            .addAnnotation(BaseUtil.getGenerationDetails(DaoAnnotationProcessor.class))
            .addMethod(createSpec)
            .build();


    JavaFile javaFile = JavaFile.builder(packageName, daoSpec)
            .build();

    try {
        javaFile.writeTo(filer);
    } catch (IOException e) {
        e.printStackTrace();
    }
    return true;
}