I found this the quick and easy way:
Used: org.json.XML
class from java-json.jar
if (statusCode == 200 && inputStream != null) {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
StringBuilder responseStrBuilder = new StringBuilder();
String inputStr;
while ((inputStr = bufferedReader.readLine()) != null) {
responseStrBuilder.append(inputStr);
}
jsonObject = XML.toJSONObject(responseStrBuilder.toString());
}