The soap that I want is like this:
<int:userId>......</int:userId>
This is tested in SoapUI and with this I get the proper response back. What Ksoap makes is this:
<userId i:type="n0:undefined" xmlns:n0="http://namespace.com">.....</userId>
If I where to paste this code into SoapUI I get an error
'<Message>Error in line 5 position 88. Element 'http://namespace.com:
userId'
contains data of the 'http://namespace.com:undefined' data contract.
The deserializer has no knowledge of any type that maps to this contract.
Add the type corresponding to 'undefined' to the list of known types -
for example, by using the KnownTypeAttribute attribute or by
adding it to the list of known types passed to DataContractSerializer.
</Message>
Maybe I am looking in the wrong direction for the solution but I am now asking how can I make ksoap omit the i:type part. If anyone can provide a different sollution, you will have my thank.
KSoap does have a tendancy to insert its own namespaces into each tag, which can give the output you're seeing.
I had a similar such problem, which was easily resolved using the following :
envelope.implicitTypes = true;
Please also have a look at this other question on SO.