1 ) Create Web Field Class public class Webfields { public static final String API_TEST_API = "TESTAPI" ; public static final int intFlagShow = 1 ; public static final String BASE_URL = "http://pratikbutani.x10.mx/" ; public final static class TESTAPI { public final static String MODE = "json_data.json" ; public final static String RESPONSE_ARR_MAIN_CHILD_TAG = "contacts" ; public final static String RESPONSE_USER_ID = "id" ; public final static String RESPONSE_NAME = "name" ; public final static String RESPONSE_EMAIL = "email" ; public final static String RESPONSE_ADDRESS = "address" ; public final static String RESPONSE_GENDER = "gender" ; public final static String RESPONSE_PROFILE_PIC = "profile_pic" ; public final static String RESPONSE_PHONE = "phone" ; ...