Question

我正在尝试通过以下网址（插入“我的API密钥”的地方）从google maps API访问一些JSON信息。

Month_name       CASH/TPA   Total

April            CASH       2184074.0

August           CASH       1780238.0

December         CASH       1176889.0

但是，每当我尝试访问数据时，我都会收到一些JSON错误。

数据采用以下格式：

https://maps.googleapis.com/maps/api/distancematrix/json?units=metric&origins=-37.8136,144.9631&destinations=-37.811363%2c144.936967&key=MY_API_KEY

我专门尝试使用以下代码访问持续时间的“值”区域：

{
   "destination_addresses" : [ "123 Swanston St, Melbourne VIC 3000, Australia" ],
   "origin_addresses" : [ "350 Bourke St, Melbourne VIC 3000, Australia" ],
   "rows" : [
      {
         "elements" : [
            {
               "distance" : {
                  "text" : "1.1 km",
                  "value" : 1051
               },
               "duration" : {
                  "text" : "7 mins",
                  "value" : 399
               },
               "status" : "OK"
            }
         ]
      }
   ],
   "status" : "OK"
}

代码进入“获取传递的元素”，然后使用以下stackTrace引发JSON异常：

    try {
        URL url = new URL("https://maps.googleapis.com/maps/api/distancematrix/json?units=metric&origins=-37.8136,144.9631&destinations=-37.811363%2c144.936967&key=MY_API_KEY");
        HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
        InputStream inputStream = httpURLConnection.getInputStream();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
        String line = "";
        while(line != null){
            line = bufferedReader.readLine();
            data = data + line;
        }
        JSONObject alldata = new JSONObject(data);
        JSONArray rows = alldata.getJSONArray("rows");
        Log.v("Log","Gets passed rows");
        JSONObject elements = rows.getJSONObject(0);
        Log.v("Log","Gets passed elements");
        JSONObject duration = elements.getJSONObject("duration");
        Log.v("Log","Gets passed duration");
        JSONObject value = duration.getJSONObject("value");

我也不可能将elemenmts作为JSONArray获得，因为每当执行此操作时，它就会告诉我数组超出范围。

我如何访问持续时间的值？

尝试浏览JSON数据android java时发生JSONException

0 个答案: