[英]Trouble parsing JsonObject - error 'String cannot be converted to JSONObject'
这是我再次尝试的方法,但无济于事。
我将String切换为double,并更改哈希图中的值以容纳double。 仍然遇到相同的错误.....很难找到没有数组就拉jsonObject的示例
这里的问题是什么?
{“ base”:“ EUR”,“ date”:“ 2017-08-25”,“ rates”:{“ AUD”:1.4919,“ BGN”:1.9558,“ BRL”:3.7045,“ CAD”:1.4769, “ CHF”:1.139,“ CNY”:7.8596,“ CZK”:26.084,“ DKK”:7.4391,“ GBP”:0.92083,“ HKD”:9.2372,“ HRK”:7.414,“ HUF”:304.68,“ IDR “:15758.0,” ILS“:4.2453,” INR“:75.598,” JPY“:129.59,” KRW“:1327.0,” MXN“:20.844,” MYR“:5.0456,” NOK“:9.2278,” NZD“: 1.6363,“ PHP”:60.327,“ PLN”:4.2598,“ RON”:4.5983,“ RUB”:69.831,“ SEK”:9.5053,“ SGD”:1.6055,“ THB”:39.332,“ TRY”:4.108, “ USD”:1.1808,“ ZAR”:15.549}}
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
JSONObject jsonObj2 = jsonObj.getJSONObject("rates");
double australia = jsonObj2.getDouble("AUD");
double bulgarian = jsonObj2.getDouble("BDN");
double brazil = jsonObj2.getDouble("BRL");
double canadian = jsonObj2.getDouble("CAD");
double swissfrank = jsonObj2.getDouble("CHF");
double chinnese = jsonObj2.getDouble("CNY");
double Czech = jsonObj2.getDouble("CZK");
double Danish = jsonObj2.getDouble("DKK");
double british = jsonObj2.getDouble("GBP");
double hongkong = jsonObj2.getDouble("HKD");
double croatian = jsonObj2.getDouble("HRK");
double hungarian = jsonObj2.getDouble("HUF");
double indonesian = jsonObj2.getDouble("IDR");
double israeli = jsonObj2.getDouble("ILS");
double indian = jsonObj2.getDouble("INR");
double japan = jsonObj2.getDouble("JPY");
double korean = jsonObj2.getDouble("KRW");
double mexican = jsonObj2.getDouble("MXN");
double malaysian = jsonObj2.getDouble("MYR");
double norwegian = jsonObj2.getDouble("NOK");
double newzealand = jsonObj2.getDouble("NZD");
double philippino = jsonObj2.getDouble("PHP");
double polish = jsonObj2.getDouble("PLN");
double romanian = jsonObj2.getDouble("RON");
double russian = jsonObj2.getDouble("RUB");
double swedish = jsonObj2.getDouble("SEK");
double singapore = jsonObj2.getDouble("SGD");
double thai = jsonObj2.getDouble("THB");
double turkish = jsonObj2.getDouble("TRY");
double usa = jsonObj2.getDouble("USD");
double southafrican = jsonObj2.getDouble("ZAR");
// tmp hash map for single contact
HashMap<String, Double> contact = new HashMap<>();
// adding each child node to HashMap key => value
contact.put("AUD", australia);
contact.put("BDN", bulgarian);
contact.put("BRL", brazil);
contact.put("CAD", canadian);
contact.put("CHF", swissfrank);
contact.put("CNY", chinnese);
contact.put("CZK", Czech);
contact.put("DKK", Danish);
contact.put("GBP", british);
contact.put("HKD", hongkong);
contact.put("HRK", croatian);
contact.put("HUF", hungarian);
contact.put("IDR", indonesian);
contact.put("ILS", israeli);
contact.put("INR", indian);
contact.put("JPY", japan);
contact.put("KRW", korean);
contact.put("MXN", mexican);
contact.put("MYR", malaysian);
contact.put("NOK", norwegian);
contact.put("NZD", newzealand);
contact.put("PHP", philippino);
contact.put("PLN", polish);
contact.put("RON", romanian);
contact.put("RUB", russian);
contact.put("SEK", swedish);
contact.put("SGD", singapore);
contact.put("THB", thai);
contact.put("TRY", turkish);
contact.put("USA", usa);
contact.put("ZAR", southafrican);
// adding contact to contact list
contactList.add(contact);
字符串不能转换为JSONObject
问题
JSONArray array = new JSONArray();
为什么使用JSONArray
"rates": {
"AUD": 1.4919,
"BGN": 1.9558,
Sol-将迭代器与JSONObject#keys
Iterator<String> iteratorObj = jsonObj2.keys();
ArrayList<String> al_getAllKeys=new ArrayList<String>();
while (iteratorObj.hasNext())
{
String key = iteratorObj.next();
..........
System.out.println("Key_VALUE: " + key + "------>" + jsonObj2.getString(key));
}
费耶
为什么选择int australia
? 。 它应该是double australia
。
double australia = ratesObject.getDouble(“ AUD”);
您没有方括号,因此根本不需要与JSONArray
相关的类或方法。
使用jsonObj2.getString("AUD")
如果您确实需要数字,请使用getDouble("AUD")
将字符串转换为Json
JSONObject jsonObj = new JSONObject(cursorUsers.getString("String");
当从JSONObject获取字符串时
String str=jsonObj.getString("parseObjectName"));
您的费率是getString()
double
,但是您正在调用getString()
并将它们存储在int
!
您的JsonArray array
为空,您正在遍历它!
rates
是一个jsonObject。 无需循环,只需调用它并通过提供其密钥即可访问每个速率。
double aud = jsonObject2.getDouble("AUD");
double bnd = jsonObject2.getDouble("BND");
您可以通过简单的步骤使用Google的Gson库进行操作,请尝试以下代码
String jsonString = "Your JSON string";
Gson gson = new Gson();
//Convert Json String to Json Object without a POJO class
JsonObject jsonObj = gson.fromJson (jsonString, JsonElement.class).getAsJsonObject();
//Get rates object and convert it to hashmap (For easy access)
HashMap<String, String> ratesMap = gson.fromJson(jsonObj.get("rates").getAsString(), new TypeToken<HashMap<String, String>>(){}.getType());
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