Java 无键解析Json数组

我想从服务器解析数组，但无法获取数组 以下是成功获取的jsonString：

{
    "status":"OK",
    "message":"this is your start and end coordinates",
    "data":"{\"start\":[\"35.778763\",\"51.427360\"],\"end\":[\"35.768779, 51.415002\"]}"
}

我希望从data arraylist获得双值：

//try/catch
Log.d(TAG, "Passes here");          
JSONObject jObject = new JSONObject(jsonString);

JSONArray jData = jObject.getJSONArray("data");
Log.d(TAG, "Not PAASING HERE !!! ");

JSONArray jArrayStart = (JSONArray) jData.get(0);
JSONArray jArrayEnd =  (JSONArray) jData.get(1);

latitudeStart =  (Double) jArrayStart.get(0);
longtitudeStart = (Double) jArrayEnd.get(1);
latitudeEnd = (Double) jArrayEnd.get(0);
longtitudeEnd = (Double) jArrayEnd.get(1);

---

data

的值不是

JSONArray

its

JSONObject

解释

JSONObject

将被

{}

---

JSONArray

将被

[]

包围

数据的值
不是
JSONArray
其
JSONObject

解释
JSONObject
将被
{}

JSONArray
将被
[]
包围。数据不是数组，它是一个json对象，因此您无法以当前方式访问它。
如果您想从json对象“数据”中提取起始数组，请使用以下命令
jObject.optJSONObject（“数据”）.optJSONArray（“开始”）

同样的东西也可以用于检索“end”json数组

然后使用optJSONObject（）和/或optString（）API从json数组中检索所需的值。
数据不是数组，而是json对象，因此您无法以当前方式访问它。
如果您想从json对象“数据”中提取起始数组，请使用以下命令
jObject.optJSONObject（“数据”）.optJSONArray（“开始”）

同样的东西也可以用于检索“end”json数组

然后使用optJSONObject（）和/或optString（）API从json数组中检索所需的值。
您试图解析的是一个
字符串

{
    "status": "OK",
    "message": "this is your start and end coordinates",
    "data": "{\"start\":[\"35.778763\",\"51.427360\"],\"end\":[\"35.768779, 51.415002\"]}"
}

所以它是这样工作的：

//first, retrieve the data from the response JSON Object from the server
JSONObject response = new JSONObject(jsonString);
String status = response.getString("status");
String message = response.getString("message");
//Note this: "data" is a string as well, but we'll have to parse that later.
String data = response.getString("data");

//get the doubles from the arrays from the "data" component.
JSONObject dataObject = new JSONObject(data);
JSONArray start = dataObject.getJSONArray("start");
JSONArray end = dataObject.getJSONArray("end");

for (int i = 0; i < start.length(); i++) {
    String value = start.getString(i);
    //do something with the start String (parse to double first)
}
for (int i = 0; i < end.length(); i++) {
    String value = end.getString(i);
    //do something with end String (parse to double first)
}

{
    "status": "OK",
    "message": "this is your start and end coordinates",
    "data": {
        "start": [
            "35.778763",
            "51.427360"
        ],
        "end": [
            "35.768779", //note that in your example, this quote is missing (first quote on next line too)
            "51.415002"
        ]
    }
}

您试图解析的是一个
字符串

{
    "status": "OK",
    "message": "this is your start and end coordinates",
    "data": "{\"start\":[\"35.778763\",\"51.427360\"],\"end\":[\"35.768779, 51.415002\"]}"
}

所以它是这样工作的：

//first, retrieve the data from the response JSON Object from the server
JSONObject response = new JSONObject(jsonString);
String status = response.getString("status");
String message = response.getString("message");
//Note this: "data" is a string as well, but we'll have to parse that later.
String data = response.getString("data");

//get the doubles from the arrays from the "data" component.
JSONObject dataObject = new JSONObject(data);
JSONArray start = dataObject.getJSONArray("start");
JSONArray end = dataObject.getJSONArray("end");

for (int i = 0; i < start.length(); i++) {
    String value = start.getString(i);
    //do something with the start String (parse to double first)
}
for (int i = 0; i < end.length(); i++) {
    String value = end.getString(i);
    //do something with end String (parse to double first)
}

{
    "status": "OK",
    "message": "this is your start and end coordinates",
    "data": {
        "start": [
            "35.778763",
            "51.427360"
        ],
        "end": [
            "35.768779", //note that in your example, this quote is missing (first quote on next line too)
            "51.415002"
        ]
    }
}

以下代码仍然没有成功：“JSONObject jObject=newjsonobject（jsonString）；JSONObject jData=jObject.getJSONObject（“数据”）；JSONArray jArrayStart=jData.getJSONArray（“start”）；JSONArray jArrayEnd=jData.getJSONArray（“end”）；latitudeStart=（双精度）jArrayStart.get（0）；LongtudityStart=（双精度）jArrayEnd.get（1）；latitudeEnd=（双精度）jArrayEnd.get（0）；LongtudentEnd=（双）jArrayEnd.get（1）；'以下代码仍然没有成功：“JSONObject jObject=newjsonobject（jsonString）；JSONObject jData=jObject.getJSONObject（“数据”）；JSONArray jArrayStart=jData.getJSONArray（“start”）；JSONArray jArrayEnd=jData.getJSONArray（“end”）；latitudeStart=（双精度）jArrayStart.get（0）；LongtudityStart=（双精度）jArrayEnd.get（1）；latitudeEnd=（双精度）jArrayEnd.get（0）；LongtudentEnd=（双）jArrayEnd.get（1）；'谢谢，问题是提到的结尾缺少QOUTING和条目的字符串类型谢谢，问题是提到的结尾缺少QOUTING和条目的字符串类型