Android studio使用XStream别名注解xlm中String转类

Question

Android studio使用别名注解xlm中String转类这句会闪退是什么原因啊？
PersonAlias Person= (PersonAlias) xs.fromXML(list[0]);
代码段在这里：

       XStream xs = new XStream();
        xs.autodetectAnnotations(true);
        ClassAliasingMapper classAliasingMapper = new ClassAliasingMapper(xs.getMapper());
        classAliasingMapper.addClassAlias("hobby", String.class);
        xs.registerLocalConverter(PersonAlias.class, "hobbies", new CollectionConverter(classAliasingMapper));
        xs.allowTypes(new Class[] {PersonAlias.class});

        PersonAlias Person= (PersonAlias) xs.fromXML(list[0]);

        String xml=xs.toXML(Person);

闪退debug跳到了这里：

Answer 1

一行一行调试，看看出错的地方是哪一行