Android：无法从 json 检索数据

我从上一个活动到此活动获取某个事件的一个 id，并将该 id 传递到当前活动中的 url，以获取该 url 中存在的城市名称。我的代码是..

String s = getIntent().getStringExtra("ar");

try{          
    HttpPost hpost = new HttpPost("xxxxxxxxxxxxxxxxx/id");
    HttpResponse response = login.client.execute(hpost);
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
    nameValuePairs.add(new BasicNameValuePair("id", s));
    hpost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
    String re = EntityUtils.toString(response.getEntity());
    System.out.print(re);

    JSONObject root = new JSONObject(re);  
    eveState.setText(root.getString("cityname"));  
}
catch(Exception e){
    Log.e("exvcx", "error getting data" +e.toString());
}

我得到的例外是没有价值cityname。我想我无法将 id 传递到此 url..请告知这是正确的方法吗？如果是，请提供问题的解决方案，否则请纠正我做错的地方。谢谢。

{"status":1,"response":[{"id":"73","name":"Dangerous","address":"Rydgggh","location":"Entry try","phnumber":"2467568","createdate":"2012-07-11 06:24:31","image":"4ffd626f021487.45227344.jpg","block":"n","deleted":"n","cityname":"Juneau","statename":"Alaska","interestname":"Comedy","username":"princeb","eventdate":"2012-07-13 15:45:29","formatteddate":"July 13, 2012"}],"imageWidth":1024,"imageHeight":1024}

请参考我在下面的问题中给出的答案

https://stackoverflow.com/a/11260845/1441666 https://stackoverflow.com/a/11260845/1441666

我有这个数组

{
"result": "success",
"countryCodeList":
[
  {"countryCode":"00","countryName":"World Wide"},
  {"countryCode":"kr","countryName":"Korea"}
] 
}

下面我正在获取国家详细信息

JSONObject json = new JSONObject(jsonstring);
JSONArray nameArray = json.names();
JSONArray valArray = json.toJSONArray(nameArray);

JSONArray valArray1 = valArray.getJSONArray(1);

valArray1.toString().replace("[", "");
valArray1.toString().replace("]", "");

int len = valArray1.length();

for (int i = 0; i < valArray1.length(); i++) {

 Country country = new Country();
 JSONObject arr = valArray1.getJSONObject(i);
 country.setCountryCode(arr.getString("countryCode"));                        
 country.setCountryName(arr.getString("countryName"));
 arrCountries.add(country);
}