Question

我有一个类，其成员变量类型为ArrayList<>。这两个类都实现了parcelable。我坚持如何完成引用另一个类的类。

这就是我所拥有的：

data class Tab (val name: String, val title: String, val color: String, val sections: ArrayList<Section>) : Parcelable {

    constructor(parcel: Parcel) : this(
            parcel.readString(),
            parcel.readString(),
            parcel.readString(),
            parcel.readTypedList<Section>(sections, Section.CREATOR))

    override fun writeToParcel(dest: Parcel?, flags: Int) {
        dest?.writeString(name)
        dest?.writeString(title)
        dest?.writeString(color)
        dest?.writeTypedList<Section>(sections)
    }

    override fun describeContents(): Int {
        return 0
    }

    companion object CREATOR : Parcelable.Creator<Tab> {
        override fun createFromParcel(parcel: Parcel): Tab {
            return Tab(parcel)
        }

        override fun newArray(size: Int): Array<Tab?> {
            return arrayOfNulls(size)
        }
    }
}

请注意，此类的sections值为ArrayList<Section>。我需要将该变量写入parcelable，但它不起作用。

供参考，这是Section类。我认为这个没关系：

data class Section(val type: String, val text: String, val imageName: String) : Parcelable {

    constructor(parcel: Parcel) : this(
            parcel.readString(),
            parcel.readString(),
            parcel.readString())

    override fun writeToParcel(dest: Parcel?, flags: Int) {
        dest?.writeString(type)
        dest?.writeString(text)
        dest?.writeString(imageName)
    }

    override fun describeContents(): Int {
        return 0
    }

    companion object CREATOR : Parcelable.Creator<Section> {
        override fun createFromParcel(parcel: Parcel): Section {
            return Section(parcel)
        }

        override fun newArray(size: Int): Array<Section?> {
            return arrayOfNulls(size)
        }
    }
}

这是失败的readTypedList和writeTypedList行。

感谢您的帮助。

Answer 1

第一个解决方案

<template>
    <button class="btn btn-md btn-success the-button" @click="makeItHappen()">Sender: {{what}}</button>
</template>

<script>
export default {
    name: "the-button",
  props: ["what"],
  methods: {
    makeItHappen: function(){
        EventBus.$emit("somethingHappened", this.what)
    }
  }

}
</script>

第二个解决方案

@Suppress("UNCHECKED_CAST")
constructor(parcel: Parcel): this(parcel.readString(), parcel.readString(), parcel.readString(), parcel.readArrayList(Tab::class.java.classLoader) as ArrayList<Section>)

使用自定义parcelable对象

1 个答案: