Here is the code. Basically, you have to take care of the version of android as spring android switch between two different implementations to avoid a known bug in network stack. Unfortunately both implementations don't share a common interface whith respect to timeouts.
private void manageTimeOuts(RestTemplate restTemplate) {
// set timeout for requests
ClientHttpRequestFactory factory = restTemplate.getRequestFactory();
if (factory instanceof HttpComponentsClientHttpRequestFactory) {
HttpComponentsClientHttpRequestFactory advancedFactory = (HttpComponentsClientHttpRequestFactory) factory;
advancedFactory.setConnectTimeout(WEBSERVICES_TIMEOUT);
advancedFactory.setReadTimeout(WEBSERVICES_TIMEOUT);
} else if (factory instanceof SimpleClientHttpRequestFactory) {
SimpleClientHttpRequestFactory advancedFactory = (SimpleClientHttpRequestFactory) factory;
advancedFactory.setConnectTimeout(WEBSERVICES_TIMEOUT);
advancedFactory.setReadTimeout(WEBSERVICES_TIMEOUT);
}
}