【发布时间】：2016-03-01 04:12:53
【问题描述】：
所以我的应用程序有一个小错误阻止我进行货币转换。
03-01 03:56:05.810 18853-18870/com.example.justin.currencyconverter20 D/JSON Parser: result: {"base":"SGD","date":"2016-02-29","rates":{"AUD":0.99576,"BGN":1.2762,"BRL":2.8316,"CAD":0.96359,"CHF":0.71217,"CNY":4.6559,"CZK":17.655,"DKK":4.868,"GBP":0.51276,"HKD":5.5237,"HRK":4.9764,"HUF":203.11,"IDR":9500.4,"ILS":2.7769,"INR":48.537,"JPY":80.352,"KRW":879.31,"MXN":12.92,"MYR":2.9931,"NOK":6.2018,"NZD":1.0804,"PHP":33.68,"PLN":2.8413,"RON":2.9205,"RUB":53.927,"SEK":6.0828,"THB":25.336,"TRY":2.1059,"USD":0.71047,"ZAR":11.391,"EUR":0.65253}}
03-01 03:56:05.811 18853-18870/com.example.justin.currencyconverter20 E/JSON Parser: Error parsing data org.json.JSONException: Value {"AUD":0.99576,"BGN":1.2762,"BRL":2.8316,"CAD":0.96359,"CHF":0.71217,"CNY":4.6559,"CZK":17.655,"DKK":4.868,"GBP":0.51276,"HKD":5.5237,"HRK":4.9764,"HUF":203.11,"IDR":9500.4,"ILS":2.7769,"INR":48.537,"JPY":80.352,"KRW":879.31,"MXN":12.92,"MYR":2.9931,"NOK":6.2018,"NZD":1.0804,"PHP":33.68,"PLN":2.8413,"RON":2.9205,"RUB":53.927,"SEK":6.0828,"THB":25.336,"TRY":2.1059,"USD":0.71047,"ZAR":11.391,"EUR":0.65253} at rates of type org.json.JSONObject cannot be converted to JSONArray
这是我的 JSONParser：
package com.example.justin.currencyconverter20;
import android.util.Log;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
public class JSONParser {
String charset = "UTF-8";
HttpURLConnection conn;
DataOutputStream wr;
StringBuilder result;
URL urlObj;
JSONArray Obj = null;
StringBuilder sbParams;
String paramsString;
public JSONArray makeHttpRequest(String url, String method) {
int i = 0;
if(method.equals("GET")){
try {
urlObj = new URL(url);
conn = (HttpURLConnection) urlObj.openConnection();
conn.setDoOutput(false);
conn.setRequestMethod("GET");
conn.setConnectTimeout(15000);
conn.connect();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
//Receive the response from the server
InputStream in = new BufferedInputStream(conn.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
Log.d("JSON Parser", "result: " + result.toString());
} catch (IOException e) {
e.printStackTrace();
}
conn.disconnect();
// try parse the string to a JSON object
try {
JSONObject jObj = new JSONObject(result.toString());
Obj = jObj.getJSONArray("rates");
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON Object
return Obj;
}
}
任何帮助将不胜感激。注意：我对此还很陌生，所以请尽可能简化，非常感谢。
编辑： 好的，我使用的 JSON api 是 http://api.fixer.io/latest?base=SGD，我使用 www.jsonlint.com 将其转换为 JSON 格式，转换为以下 JSON：
{
"base": "SGD",
"date": "2016-02-29",
"rates": {
"AUD": 0.99576,
"BGN": 1.2762,
"BRL": 2.8316,
"CAD": 0.96359,
"CHF": 0.71217,
"CNY": 4.6559,
"CZK": 17.655,
"DKK": 4.868,
"GBP": 0.51276,
"HKD": 5.5237,
"HRK": 4.9764,
"HUF": 203.11,
"IDR": 9500.4,
"ILS": 2.7769,
"INR": 48.537,
"JPY": 80.352,
"KRW": 879.31,
"MXN": 12.92,
"MYR": 2.9931,
"NOK": 6.2018,
"NZD": 1.0804,
"PHP": 33.68,
"PLN": 2.8413,
"RON": 2.9205,
"RUB": 53.927,
"SEK": 6.0828,
"THB": 25.336,
"TRY": 2.1059,
"USD": 0.71047,
"ZAR": 11.391,
"EUR": 0.65253
}
}
【问题讨论】：
-
请发布您从服务器获取的json数据
-
就像错误消息中所说的 json 字符串以
{开头，这意味着它是一个 json 对象而不是数组，您需要将其解析为对象而不是数组，rates 是 json 对象而不是数组 -
已更新 json 数据。
标签： java android android-studio android-json gson