如何在Android kotlin,Moshi和Retrofit中使用动态键解析嵌套JSON?

时间:2019-11-19 14:50:37

标签: android kotlin retrofit2 kotlin-android-extensions moshi

如何在Android kotlin,Moshi和Retrofit中使用 NESTED 动态键解析嵌套JSON?

我从alpha-vantage获取此JSON。

格式示例:

{
    "Meta Data": {
        "1. Information": "Intraday (15min) open, high, low, close prices and volume",
        "2. Symbol": "AAME",
        "3. Last Refreshed": "2019-11-18 16:00:00",
        "4. Interval": "15min",
        "5. Output Size": "Compact",
        "6. Time Zone": "US/Eastern"
     },
    "Time Series (15min)": {//Dynamic - > Time Series (5min) / Time Series (30min)
        "2019-11-18 16:00:00": {//Dynamic
            "1. open": "1.6700",
            "2. high": "1.6700",
            "3. low": "1.5700",
            "4. close": "1.5700",
            "5. volume": "1521"
        },
        "2019-11-18 15:45:00": {//Dynamic
            "1. open": "1.6600",
            "2. high": "1.7400",
            "3. low": "1.6600",
            "4. close": "1.7400",
            "5. volume": "355"
        }
    }
}

我尝试使用自定义适配器,但是找不到用它解析双嵌套动态键的方法。 现在,我使用手动解析:

fun convertJsonToItemDetails(jso: JSONObject) {
    val meta: JSONObject? = jso.optJSONObject("Meta Data")
    var metaData: ItemMetaData? = null
    meta?.apply {
        val information = optString("1. Information")
        val symbol = optString("2. Symbol")
        val lastRefreshed = optString("3. Last Refreshed")
        val interval = optString("4. Interval")
        val outputSize = optString("5. Output Size")
        val timeZone = optString("6. Time Zone")
        metaData =
            ItemMetaData(information, symbol, lastRefreshed, interval, outputSize, timeZone)
    }
    if (metaData == null) {
        //TODO return error object
        return
    }

    val timeSeriesJSON = jso.optJSONObject("Time Series (${metaData?.interval})")
    val timeSeires = HashMap<String, IntervalOutput>()
    if (timeSeriesJSON == null) {
        //TODO return error object
        return
    }
    for (key in timeSeriesJSON.keys()) {
        val intervalOutPutJSON = timeSeriesJSON.getJSONObject(key)
        val open = intervalOutPutJSON.getString("1. open")
        val high = intervalOutPutJSON.getString("2. high")
        val low = intervalOutPutJSON.getString("3. low")
        val close = intervalOutPutJSON.getString("4. close")
        val volume = intervalOutPutJSON.getString("5. volume")
        timeSeires[key] = IntervalOutput(open, high, low, close, volume)
    }
    val itemDetails = ItemDetails(metaData, timeSeires)
    _itemDetails.value = itemDetails
}

2 个答案:

答案 0 :(得分:1)

只需将您的json字符串传递给此方法,便可以正常使用。

private void parseJson(String jsonString) {
    try {
        //  pass your response json string here
        JSONObject object = new JSONObject(jsonString);

        Iterator<String> it = object.keys();
        while (it.hasNext()) {
            String key = it.next();
            try {
                if (object.get(key) instanceof JSONObject) {
                    Log.e("Main OBJ", key);
                    JSONObject object2 = object.getJSONObject(key);
                    Iterator<String> it2 = object2.keys();
                    while (it2.hasNext()) {
                        String key2 = it2.next();
                        if (object2.get(key2) instanceof JSONObject) {
                            Log.e("Sub OBJ", key2);
                            JSONObject object3 = object2.getJSONObject(key2);
                            Iterator<String> it3 = object3.keys();
                            while (it3.hasNext()) {
                                String key4 = it3.next();
                                Log.e("Values", key4);
                            }
                        } else {
                            Log.e("Values", object2.getString(key2));
                        }
                    }

                } else {
                    System.out.println(key + ":" + object.getString(key));
                }
            } catch (Throwable e) {
                try {
                    System.out.println(key + ":" + object.getString(key));
                } catch (Exception ee) {
                    ee.printStackTrace();
                }
                e.printStackTrace();
            }
        }

    } catch (JSONException e) {
        e.printStackTrace();
    }
}

输出:

Main OBJ: Meta Data
Values: Intraday (15min) open, high, low, close prices and volume
Values: AAME
Values: 2019-11-18 16:00:00
Values: 15min
Values: Compact
Values: US/Eastern
Main OBJ: Time Series (15min)
Sub OBJ: 2019-11-18 16:00:00
Values: 1. open
Values: 2. high
Values: 3. low
Values: 4. close
Values: 5. volume
Sub OBJ: 2019-11-18 15:45:00
Values: 1. open
Values: 2. high
Values: 3. low
Values: 4. close
Values: 5. volume

答案 1 :(得分:0)

使用JSONObject keys()获取Dynamic Keys,然后使用Iterate每个特定键获取动态值。

打印第一层的所有JSONObject的时间很短,如下所示。

var dynamicJSON: String = {
    "Meta Data": {
        "1. Information": "Intraday (15min) open, high, low, close prices and volume",
        "2. Symbol": "AAME",
        "3. Last Refreshed": "2019-11-18 16:00:00",
        "4. Interval": "15min",
        "5. Output Size": "Compact",
        "6. Time Zone": "US/Eastern"
     },
    "Time Series (15min)": {//Dynamic - > Time Series (5min) / Time Series (30min)
        "2019-11-18 16:00:00": {//Dynamic
            "1. open": "1.6700",
            "2. high": "1.6700",
            "3. low": "1.5700",
            "4. close": "1.5700",
            "5. volume": "1521"
        },
        "2019-11-18 15:45:00": {//Dynamic
            "1. open": "1.6600",
            "2. high": "1.7400",
            "3. low": "1.6600",
            "4. close": "1.7400",
            "5. volume": "355"
        }
    }
}  

然后,您必须开始将其解析为JSONObject,然后对JSONObject "Meta Data""Time Series (15min)"进一步执行相同的过程

val dynamicjson: JSONObject = JSONObject(dynamicJSON)
val keys: Iterator<*> = dynamicjson.keys()

while (keys.hasNext()) { // loop to get the dynamic key
   val currentDynamicKey = keys.next() as String
   // get the value of the dynamic key
   val currentDynamicValue: JSONObject = dynamicjson.getJSONObject(currentDynamicKey)
   // do something here with the value... or either make another while loop to Iterate further

   Log.e("JSON Value", currentDynamicValue.toString())
}

当我执行代码时,输​​出看起来像这样:

  

2019-12-12 15:21:08.399 19798-19798 / com.animusabhi.dynamicjsonparsing E / JSON值:{“ 1.信息”:“当日(15分钟)开盘,高,低,收盘价and volume“,” 2。Symbol“:” AAME“,” 3。Last Refreshed“:” 2019-11-18 16:00:00“,” 4。Interval“:” 15min“,” 5。Output Size“ :“紧凑”,“ 6。时区”:“美国/东部”}

     

2019-12-12 15:21:09.158 19798-19798 / com.animusabhi.dynamicjsonparsing E / JSON值{“ 2019-11-18 16:00:00”:{“ 1。open”: “ 1.6700”,“ 2。高”:“ 1.6700”,“ 3。低”:“ 1.5700”,“ 4。收盘”:“ 1.5700”,“ 5。交易量”:“ 1521”},“ 2019-11-11 18 15:45:00“:{” 1。打开“:” 1.6600“,” 2。高“:” 1.7400“,” 3。低“:” 1.6600“,” 4。关闭“:” 1.7400“,” 5.卷“:” 355“}}

检查一下,让我知道它是否无效。