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);
}
@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);
}
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.
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