Android Parcelable - Write and read ArrayList< IA > when IA is a interface

Question

I have a interface IA and class B and C that implement them. Both B and C implement Parcelable as well.

Then I have the tricky part:

Class D has a ArrayList< IA >. I need this too insert both classes B and C in the arraylist. They share the same structure but the "IS-A" relation don't apply.

I need to pass D from one activity to another as a Parcel.

I've tried to write (ArrayList<IA>) in.readSerializable but I got a IOException. I know that if IA was not a interface the problem was easy, but I can't seem to find an easy solution for this.

Any ideas?

@SuppressWarnings("unchecked") public D (Parcel in) {     list = new ArrayList<IA>();     (...)         list = (ArrayList<IA>) in.readSerializable      }  @SuppressWarnings("rawtypes") public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {     public D createFromParcel(Parcel in) {         return new D(in);     }      public D[] newArray(int size) {         return new D[size];     } };  public int describeContents() {     return 0; }  public void writeToParcel(Parcel dest, int flags) {     (...)     dest.writeList(list); } 

Answer 1

    @SuppressWarnings("unchecked") public D (Parcel in) {     list = new ArrayList<IA>();     (...)         //ERROR -> list = (ArrayList<IA>) in.readSerializable      list = in.readArrayList(IA.class.getClassLoader()); }  @SuppressWarnings("rawtypes") public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {     public D createFromParcel(Parcel in) {         return new D(in);     }      public D[] newArray(int size) {         return new D[size];     } };  public int describeContents() {     return 0; }  public void writeToParcel(Parcel dest, int flags) {     (...)     dest.writeList(list); } 

Answer 2

I recommend you to install "Android Parcelable code generator" plugin. After this you can generate writeToParcel function, constructor which reads from parcel and creator class only whith clicking Alt+Insert buttons.