这是我最好的解决方案，很高兴听到有人对此有所想法。
public abstract class A implements Parcelable { private int a; protected A(int a) { this.a = a; } public void writeToParcel(Parcel out, int flags) { out.writeInt(a); } protected A(Parcel in) { a = in.readInt(); }}public class B extends A { private int b; public B(int a, int b) { super(a); this.b = b; } public static final Parcelable.Creator<B> CREATOR = new Parcelable.Creator<B>() { public B createFromParcel(Parcel in) { return new B(in); } public B[] newArray(int size) { return new B[size]; } }; public int describeContents() { return 0; } public void writeToParcel(Parcel out, int flags) { super.writeToParcel(out, flags); out.writeInt(b); } private B(Parcel in) { super(in); b = in.readInt(); }}
