防止 Proguard 删除未使用的属性

Prevent Proguard from removing unused Properties

我有一个 class:

public static class Properties {
    public final static Property Id = new Property(0, String.class, "id", true, "ID");
    public final static Property Name = new Property(1, String.class, "name", false, "NAME");
    public final static Property Email = new Property(2, String.class, "email", false, "EMAIL");
    public final static Property ValidatedAt = new Property(3, long.class, "validatedAt", false, "VALIDATED_AT");
};

以及以下混淆器规则:

-keep class **$Properties

但是当我assemble这里的发布版本是输出:

public class UserDao$Properties
{
  public static final f a;
  static
  {
    a = new f(0, String.class, "id", true, "ID");
    new f(1, String.class, "name", false, "NAME");
    new f(2, String.class, "email", false, "EMAIL");
    new f(3, Long.TYPE, "validatedAt", false, "VALIDATED_AT");
  }
}

(来自反编译的APK)

注意只有 Id 字段已设置,其他三个字段尚未设置(即使它们的构造函数存在)。

其他三个字段没有在代码中使用,但被GreenDAO使用反射使用。

如何防止其他三个字段被删除?

我试过了

-keepclassmembers class **$Properties {
    public final static Property *;
}

与上述规则一致,但它不起作用。

试试这个

-keepclassmembers class **$Properties {
    public static <fields>;
}