JSONObject jsonObject = new JSONObject(jsonData);
//通過(guò)迭代器獲取這段json當(dāng)中所有的key值
Iterator keys = jsonObject.keys();
//然后通過(guò)一個(gè)循環(huán)取出所有的key值
while (keys.hasNext()){
String key = String.valueOf(keys.next());
//最后就可以通過(guò)剛剛得到的key值去解析后面的json了
}

/**
   * 獲取匯率
   *
   * @return
   * @throws Exception
   */
  @SuppressWarnings("rawtypes")
  public BigDecimal getRate() throws Exception {
    String m_rateResult = HttpUtil.sendGet("https://x.szsing.com/v2/quote/price/m_rate");
    JSONObject jsonObject = new JSONObject(m_rateResult);
    JSONObject data = jsonObject.getJSONObject("data");
    Iterator keys = data.keys();
    String CNY = "0";
    while (keys.hasNext()) {
      String key = String.valueOf(keys.next());
      JSONObject m_rate = data.getJSONObject(key);
      CNY = m_rate.getString("CNY");
      if (CNY.isEmpty() == false) {
        break;
      }
    }
    return new BigDecimal(CNY);
  }
 
  /**
   * 獲取類別版本
   *
   * @return
   * @throws Exception
   */
  public String getCategoryVersion() throws Exception {
    String m_custom = HttpUtil.sendGet("https://x.szsing.com/v2/quote/price/m_custom");
    JSONObject jsonObject = new JSONObject(m_custom);
    JSONObject data = jsonObject.getJSONObject("data");
    JSONObject category = data.getJSONObject("category");
    return category.getString("version");
  }

{
data: { 
   "姓名": "老王",
  "年齡": "41",
  "性別": "男",
  } 
}

JSONObject jsonObject = new JSONObject(jo.toString);//json數(shù)據(jù)
    JSONObject data= jsonObject.getJSONObject("data");          
   // 動(dòng)態(tài)獲取key值
  Iterator<String> iterator = data.keys();//使用迭代器
  while (iterator.hasNext()) {
  String key = iterator.next();//獲取key
  String value = data.getString(key);//獲取value
  Log.e("key-value","key="+key+" value="+value);
  }