class Person : Serializable {
    var name = ""
    var age = 0
}
//傳遞
OneActivity {
    val person = Person().apply {
        name = "張三"
        age = 18
    }
    Intent(this, TwoActivity::class.java).also {
        it.putExtra("person", person)
        startActivity(it)
    }
}
//獲取
TwoActivity {
    val person = intent.getSerializableExtra("person") as Person    //反序列化成對象
}

class Person() : Parcelable {
    var name = ""
    var age = 0
    constructor(parcel: Parcel) : this() {
        //讀出
        name = parcel.readString() ?: ""
        age = parcel.readInt()
    }
    //寫入
    override fun writeToParcel(parcel: Parcel, flags: Int) {
        parcel.writeString(name)
        parcel.writeInt(age)
    }
    //返回0就行
    override fun describeContents(): Int {
        return 0
    }
    //伴生對象實現接口
    companion object CREATOR : Parcelable.Creator<Person> {
        //返回對象
        override fun createFromParcel(parcel: Parcel): Person {
            return Person(parcel)
        }
        //返回一個數組，形參 size 作為數組大小
        override fun newArray(size: Int): Array<Person?> {
            return arrayOfNulls(size)
        }
    }
}
//傳遞方式和 Serializable 一樣，使用如下：
TwoActivity {
    val person = intent.getParcelableExtra("person")
}

//Module Gradle 引入插件
plugins {
    id 'kotlin-parcelize'
}
//使用
@Parcelize
class Person(val name: String, var age: Int) : Parcelable