使用 proguard 保留特定注释

2022-01-13 00:00:00 annotations android java proguard

我的项目中有两种类型的注解:Annotation1 和 Annotation2.两者都是运行时注释.所以，我的问题是如何只保留 Annotation1 并剥离 Annotation2?

I have two types of annotation in my project: Annotation1 and Annotation2. Both are runtime annotations. So, my question is how to keep only Annotation1 and strip Annotation2?

例子:

class Test {
    @Annotation1
    @Annotation2
    String name;
}

我希望从所有字段中删除 Annotation2 并在任何地方保留 Annotation1.

I want Annotation2 to be removed from all fields and Annotation1 to be kept everywhere.

我找不到这是否可能.我只知道如何使用以下方法保留所有注释:

I can't find whether this is possible. I only know how to keep all annotations using:

-keepattributes *Annotation*

这可能吗?如果不是，为什么?

Is this possible? If not, why?

推荐答案

如果相应的注解类没有在其他地方使用(检索、转换、调用...)，ProGuard 会自动从类/字段/方法中删除注解.您不能强制 ProGuard 删除注释，但可以告诉它保留看似未使用的注释:

ProGuard automatically removes annotations from the classes/fields/methods if the corresponding annotation classes are not used (retrieved, cast, invoked,...) elsewhere. You can't force ProGuard to remove annotations, but you can tell it to keep seemingly unused annotations:

-keep @interface com.example.MyAnnotation

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