{"user_main": {
              "password": "hello1@H",
              "email":"hartk1@walla.com"},
 "accaunts": {
              "gmail":{
                       "max78@gmail.com":"max123"},
              "facebook":{
                       "max456@gmail.com":"max3234"},
              "twitter":{
                       "max456@gmail.com":"maxpass12"}
             }
}

Iterator<String> iter = null;
try {
     iter = jObject.optJSONObject("u'accaunts'").keys();
     while (iter.hasNext()) {
          String key = iter.next();
          mylist.add(jObject.get(key).toString());
     }
    }catch (JSONException e) {
        e.printStackTrace();
    }

{"u'twitter'":{"u'max456@gmail.com'":"u'maxpass12'"},"u'facebook'":{"u'max456@gmail.com'":"u'max3234'"},"u'gmail'":{"u'max78@gmail.com'":"u'max123'"}}