How to serialize a third-party non-serializable final class (e.g. google's LatLng class)?

Question

I'm using Google's LatLng class from the v2 Google Play Services. That particular class is final and doesn't implement java.io.Serializable. Is there any way I can make that LatLng class implement Serializable?

public class MyDummyClass implements java.io.Serializable {
    private com.google.android.gms.maps.model.LatLng mLocation;

    // ...
}

I don't want to declare mLocation transient.

Answer 1

It's not Serializable but it is Parcelable, if that would be an option instead. If not you could handle the serialization yourself:

public class MyDummyClass implements java.io.Serialiazable {
    // mark it transient so defaultReadObject()/defaultWriteObject() ignore it
    private transient com.google.android.gms.maps.model.LatLng mLocation;

    // ...

    private void writeObject(ObjectOutputStream out) throws IOException {
        out.defaultWriteObject();
        out.writeDouble(mLocation.latitude);
        out.writeDouble(mLocation.longitude);
    }

    private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
        in.defaultReadObject();
        mLocation = new LatLng(in.readDouble(), in.readDouble());
    }
}