解析xml kotlin android [英] Parsing xml kotlin android

问题描述

我有这样的xml：

<horo>
<aries>
<today>
Сегодня вас могут здорово огорчить. Если от расстройства все начнет валится из рук, просто спокойно сядьте и тихонько подождите хорошей новости.
</today>
</aries>
<taurus>
<today>
Сегодня у вас могут возникнуть проблемы на личном фронте. Спасти вас от перспективы оказаться не у дел может сухой, рациональный и в высшей степени объективный подход к проблеме.
</today>
</taurus>
</horo>

现在我学习kotlin whith改装。我包含解析xml的库，而不是我不能理解如何解析这个xml的create对象。我有对象：

And now i learning kotlin whith retrofit. I include libraries for parse xml, and not i cant understand how create object for parsing this xml. I have object:

@Root(name = "horo", strict = false)
open class DailyHoroscope{
    @get : Element(name = "aries") var aries : Aries? = null
}

@Root(name = "aries", strict = false)
open class Aries{
    @get : Element(name = "today") var today : String? = null
}

但我有错误：

rg.simpleframework.xml.core.ConstructorException：默认构造函数
不能接受只读@ org.simpleframework.xml.Element（data = false，
name = aries，required = true，type = void）类
ac.kotlintest.model中方法'aries'。

rg.simpleframework.xml.core.ConstructorException: Default constructor can not accept read only @org.simpleframework.xml.Element(data=false, name=aries, required=true, type=void) on method 'aries' in class ac.kotlintest.model.

更新

我在java中写了代码：

i writed code in java:

@Root(name = "horo", strict = false)
public class DailyHoroscopeJ {
    @Element(name = "aries")
    public Aries aries;

    public Aries getAries() {
        return aries;
    }

    public void setAries(Aries aries) {
        this.aries = aries;
    }
}

@Root(name = "aries", strict = false)
 class Aries{
    @Element(name = "today")
    public String today;

    public String getToday() {
        return today;
    }

    public void setToday(String today) {
        this.today = today;
    }
}

它工作正常，然后我转换为kotlin

and it work fine, then i convert to kotlin

@Root(name = "horo", strict = false)
class DailyHoroscope {
    @get:Element(name = "aries")
    var aries:Aries? = null
}
@Root(name = "aries", strict = false) class Aries {
    @get:Element(name = "today")
    var today:String? = null
}

但我有同样的问题（（（

but i have same problem((((

推荐答案

@ daementus的答案几乎是完美的。如果你想使用默认参数的构造函数注入，你必须强制Kotlin生成构造函数重载：

The answer of @daementus is almost perfect. If you want to use constructor injection with default parameters, you have to force Kotlin to generate constructor overloads:

data class Section @JvmOverloads constructor(

    @field:Element(name = "id")
    @param:Element(name = "id")
    val id: Long,

    @field:Attribute(name = "title", required = false)
    @param:Attribute(name = "title", required = false)
    val title: String = ""
)

如果没有它，你将得到构造函数与类Section 不匹配。
默认情况下，Kotlin会生成一个包含所有参数和特殊构造函数的构造函数。

Without it you will get Constructor not matched for class Section. By default Kotlin generates a constructor with all parameters and a special constructor.

注意：我更愿意在评论中回答，但我没有足够的积分。

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