Making data class with ArrayList inside Parcelable

Question

I added Parcelable implementation for my class and get this code:

data class Category (val name:String, var factors:ArrayList<String>):Parcelable {
    constructor(parcel: Parcel) : this(
            parcel.readString(),
            TODO("factors")) {
    }

    override fun writeToParcel(parcel: Parcel, flags: Int) {
        parcel.writeString(name)
    }

    override fun describeContents(): Int {
        return 0
    }

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

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

As far as I understand I should write method for reading data from ArrayList. I've tried to use

parcel.readArrayList()

but can not understand, how to insert String as ClassLoader. Please help me to understand, how to make this object Parcelable.

dipdipdip · Accepted Answer · 2018-03-01 09:07:47Z

1

Use the following within your Constructor:

parcel.createStringArrayList()

and within writeToParcel:

parcel.writeStringList(this.mTest)

Just a side node: If you're using Android Studio, just let it generate the Parcelable with the Parcelable code generator Plugin.

answered Mar 1, 2018 at 9:07

dipdipdip

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Comments

Akshay · Accepted Answer · 2018-03-01 09:25:02Z

0

Read Parcelable

    segments=new ArrayList<>();
    in.readTypedList(segments,Segments.CREATOR);
    Multi = in.readString();

And for writing

 dest.writeTypedList(segments);
 dest.writeString(Multi);

And it works like a charm

answered Mar 1, 2018 at 9:25

Akshay

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