How to send an Arraylist<Object> to Webservice SOAP

Question

Good Afternoon

Assuming I have the following Java Order and Item classes:

public class Pedido implements KvmSerializable, Serializable {

private String numero;
private ArrayList<Item> itens;

public String getNumero(){
    return numero;
}

public void setNumero(String numero){
    this.numero = numero;
}

public ArrayList<Item> getItens(){
    return itens;
}

public void setItens(ArrayList<Item> itens){
    this.itens = itens;
}

public Pedido(){

}
}

---

public class Item implements KvmSerializable, Serializable {

private String codigo;
private double valor;

public String getCodigo(){
    return codigo;
}

public void setCodigo(String codigo){
    this.codigo = codigo;
}


public double getValor(){
    return valor;
}

public void setValor(double valor){
    this.valor = valor;
}

public Item(){

}
}

What is the procedure for sending a Request object with multiple items to a Webservice using SOAP technology, using the KSOAP2 library via Android?

I can make the request normally with objects that do not involve Arrays, but when this happens I get the following error message:

W/System.err: java.lang.Runtimeexception: Cannot serialize:

From now on, thank you.

Answer 1

change public class Pedido { for public class Pedido implements Serializable {

and

public class Item { for public class Item implements Serializable {

If your classes are not serialized they cannot be sent to the backend, this should already solve the problem :D

Answer 2

Good Afternoon

I managed to solve my problem. I’m not sure why the KSOAP2 library acts this way, but there’s no way I could serialize an array automatically as I do with primitive type attributes.

The solution I found was to pass the list as a separate parameter and add to the object when mounting the request. Following the example of the above class, the solution would be:

private final String NAMESPACE = "SEU_NAMESPACE";    

public void SeuMetodo(Pedido pedido, ArrayList<Item> itens) {
    SoapObject request = new SoapObject(NAMESPACE, "SeuMetodo");
    SoapObject ped = new SoapObject(NAMESPACE, "pedido");
    SoapObject arrayItens = new SoapObject(NAMESPACE, "Itens");

    for (Item item : itens){
        arrayItens.addProperty("Item", item);
    }

    ped.addProperty("numero", pedido.getNumero());
    ped.addProperty("Itens", arrayItens);

    request.addProperty("pedido", ped);

    try {
        //PROCEDIMENTOS DE ENVIO DA REQUISIÇÃO E RECEBIMENTO DA RESPOSTA
    } catch (Exception e) {
        e.printStackTrace();
    }
}

I hope I’ve been able to be clear, if anyone else has that problem and needs help I’m available.