Android: Abstract Parcelable Object Wrapper

DataParcel.java

public abstract class DataParcel<D> implements IDataParcel<D> {
	protected D data;

	public DataParcel(D data) {
		this.data = data;
	}

	public DataParcel(Parcel in) {
		readFromParcel(in);
	}

	@Override
	public D getData() {
		return this.data;
	}

	public abstract void readFromParcel(Parcel in);

	@Override
	public int describeContents() {
		// TODO Auto-generated method stub
		return 0;
	}
}

IDataParcel.java

public interface IDataParcel<D> extends Parcelable {
    public D getData();
}

UserParcel.java

public class UserParcel extends DataParcel<User> {

    public UserParcel(User user) {
        super(user);
    }

    public UserParcel(Parcel in) {
        super(in);
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(data.getID());
        dest.writeString(data.getDisplayName());
        dest.writeString(data.getEmail());
    }

    @Override
    public void readFromParcel(Parcel in) {
        data = new User();
        data.setID(in.readString());
        data.setDisplayName(in.readString());
        data.setEmail(in.readString());
    }

    public static final Parcelable.Creator<UserParcel> CREATOR = new Parcelable.Creator<UserParcel>() {

        @Override
        public UserParcel createFromParcel(Parcel in) {
            return new UserParcel(in);
        }

        @Override
        public UserParcel[] newArray(int size) {
            return new UserParcel[size];
        }

    };

}

Important Note

Each subclass needs a static final Parcelable.Creator called CREATOR, otherwise Parcelable will not work. See the example UserParcel.java for a basic usage.