Retrofit 2 - null response body

Question

I am trying to convert following response with Retrofit 2

{
    \"errorNumber\":4,
    \"status\":0,
    \"message\":\"G\\u00f6nderilen de\\u011         


        

Answer 1

I have solved the problem. When I make a bad request (HTTP 400) Retrofit doesn't convert the response. In this case you can access the raw response with response.errorBody.string(). After that you can create a new Gson and convert it manually:

if (response.code() == 400 ) {
    Log.d(TAG, "onResponse - Status : " + response.code());
    Gson gson = new Gson();
    TypeAdapter<RegisterResponse> adapter = gson.getAdapter(RegisterResponse.class);
    try {
        if (response.errorBody() != null)
            registerResponse = 
                adapter.fromJson(
                    response.errorBody().string());
    } catch (IOException e) {
        e.printStackTrace();
    }
}